How the CVE Works
CVE-2025-1234 exploits improper input validation in Pitchfork (< v0.11.0) when processing HTTP headers via Rack 3. Attackers inject malicious newline (\r\n) sequences into crafted HTTP requests, leading to response splitting. This allows header injection, cache poisoning, or cross-site scripting (XSS) by manipulating server responses. The vulnerability occurs due to insufficient sanitization of user-supplied header values before they are written into HTTP responses.
DailyCVE Form
Platform: Pitchfork
Version: < 0.11.0
Vulnerability: HTTP Response Splitting
Severity: Critical
Date: Mar 27, 2025
What Undercode Say:
Exploitation
1. Craft a malicious request with `\r\n` sequences:
curl -H "User-Agent: EvilAgent\r\nX-Injected: true" http://target/
2. Use Burp Suite to manipulate headers:
GET / HTTP/1.1 Host: target User-Agent: Mozilla\r\nLocation: javascript:alert(1)
Protection
1. Upgrade Pitchfork:
gem update pitchfork --version ">=0.11.0"
2. Implement input sanitization:
headers.each { |k, v| v.gsub!(/[bash]/, "") }
3. Use WAF rules to block malicious patterns:
if ($http_user_agent ~ (\r|\n)) { return 403; }
Detection
1. Scan with Nmap:
nmap --script http-headers -p 80,443 target
2. Log analysis for suspicious patterns:
grep -E "\r|\n" /var/log/pitchfork.log
Mitigation
1. Apply strict CSP headers:
Content-Security-Policy: default-src 'self'
2. Disable vulnerable Rack middleware if unused.
3. Monitor for unusual header modifications.
References
References:
Reported By: https://github.com/advisories/GHSA-pfqj-w6r6-g86v
Extra Source Hub:
Undercode
