ssrf-ip-filter-bypass

Bypass SSRF IP filters by applying address encoding techniques like hex, octal, decimal, and IPv6 formats, plus URL obfuscation methods, to evade string-based validation checks blocking internal and cloud metadata IPs.

SSRF IP filter bypass exploits naive string validation by transforming blocked IP addresses into alternative valid text representations such as hexadecimal or octal formats, tricking the filter into allowing requests to internal services.

Test SSRF vulnerabilities by sending requests to the target endpoint using precomputed IP address variants and URL parsing bypasses, attempting to access blocked internal services and cloud instance metadata like 169.254.169.254.

URL obfuscation techniques for SSRF bypass include userinfo confusion, backslash path tricks, and scheme obfuscation to bypass filters that validate URL structure instead of resolving the actual IP address.

Yes, you can use IPv6 formats and other valid text representations like hex, octal, and decimal to bypass string-based IP validation filters that block standard IPv4 addresses like 127.0.0.1 during security testing.

String-based IP validation for SSRF protection is limited because it fails to account for alternative IP address encodings and URL parsing inconsistencies, allowing testers to bypass filters using hex, octal, and userinfo confusion techniques.