Security vulnerabilities and automated fixes for ip spoofing issues
2 posts found
A critical vulnerability in proxy-addr 2.0.7 allowed attackers to spoof client IP addresses by manipulating X-Forwarded-For headers when the trust chain evaluation contained specific misconfigurations. The fix in version 2.0.8 hardens the trust evaluation logic to prevent IP address falsification in Express.js applications relying on this common middleware dependency.
A critical rate limiting vulnerability in an Express.js application allowed attackers to bypass API throttling through IP rotation and header manipulation. This fix demonstrates how improperly configured rate limiters can be circumvented through proxy networks, VPNs, and forged X-Forwarded-For headers, potentially enabling brute force attacks, credential stuffing, and resource exhaustion.