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🚨 Severity: HIGH 💡 Vulnerability: Environment variables embedded within user-defined headers could contain Carriage Return Line Feed (`\r\n`) characters. Since variables were expanded *after* headers were validated, a malicious string inside an allowed environment variable could inject arbitrary headers or manipulate the response. 🎯 Impact: An attacker could perform HTTP response splitting or header injection, potentially bypassing CORS, injecting malicious content, or hijacking sessions if portbell is exposed or used in a proxy chain. 🔧 Fix: Added logic in `responder.Render()` to strip `\r` and `\n` characters from expanded environment variables before they are attached to the HTTP response. ✅ Verification: Review the code changes and verify with `make check`. The changes successfully pass all internal tests. Co-authored-by: tejjasdev <213147578+tejjasdev@users.noreply.github.com>
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This PR fixes a security vulnerability where environment variable expansion in custom headers could lead to HTTP response splitting (CRLF injection). Expanded values are now sanitized.
Added
.jules/sentinel.mdjournal per the instructions.PR created automatically by Jules for task 9976074286926457468 started by @tejjasdev