pentester.land· Jun 17, 2023· by Rafael da Costa Santos (@rafabyte_)

Exploiting HTTP Parsers Inconsistencies

Target Program: Nginx, AWS, Spring Boot, Flask, PHP

🎯 Vulnerability: Server-Side Request Forgery (SSRF)

💡 Defense Fix: Enforce URL whitelisting, block private IP ranges (10.0.0.0/8, 169.254.169.254), and mandate AWS IMDSv2 headers.

#Parsing issue#WAF bypass#SSRF#Desync attack#Cache poisoning attack