Account Takeover Methodology
Application Level DoS
Authentication Bypass
Broken-Link Hijacking
Broken Auth And Session Management
Finding CVEs
Web Page Source Code Review
EXIF Geo Data Not Stripped
File Upload Bypass
Find Origin IP
GraphQL
HTTP Desync Attack
Host-Header Attack
HTML-Injection
IDOR
JWT ATTACK
OAuth
SSTI
Sign Up Functionality
Tabnabbing
Weak Password Policy
HTTP_Desync
  • Basics:
    "HTTP request smuggling is a technique for interfering with the way a web site processes sequences of HTTP requests that are received from one or more users. Request smuggling vulnerabilities are often critical in nature, allowing an attacker to bypass security controls, gain unauthorized access to sensitive data, and directly compromise other application users. " -Portswigger

Where ?:

  • Any Endpoint might be Vulnerable to HTTP Desync attack.
  • You can Find the Vulnerability on Non-endpoints as well, But impact is always much higher on Sensitive Endpoints ;)

Step 1:

  • Go To Repeater tab, and try various Timing based payloads to confirm the bug. More Explaination here:

Step 2:

  • Once you have successfully discovored the bug, you can chain it with various bugs eg. Account Takeover by stealing session IDs, Cross side Scripting Attacks in User-Agent Header,etc. More Description here:

Tools:

Usage:
  • Smuggler.py :
    cat alive_urls.txt | python3 smuggler.py -m GET/POST #either GET or POST
    OR
    python3 smuggler.py -u https://example.com -m GET/POST
  • ​Burp_smuggler (also available in BApp store)

More Info:

Topics

​https://paper.seebug.org/1049/ (Recommended !)
​Portswigger Topic​
​Portswigger Lab​

Reports (Hackerone):

​Report 1​
​Report 2​
​Report 3​
​Report 4​
​Report 5​
​Report 6​
​Report 7​
​Report 8​

Writeups (Medium.com):

​Article 1​
​Article 2​
​Article 3​
​Article 4​

Extra:

Author:

​Neutron__​

If you think something was missed, feel free to add/modify/delete it :)