CVE-2024-25398
📋 TL;DR
Srelay v0.4.8p3 contains a vulnerability where specially crafted network payloads can trigger a denial of service condition, causing the SOCKS proxy service to crash or become unresponsive. This affects anyone running the vulnerable version of Srelay as a SOCKS proxy or relay service. The vulnerability allows attackers to disrupt proxy services without authentication.
💻 Affected Systems
- Srelay (SOCKS proxy and Relay)
📦 What is this software?
Srelay by Srelay Project
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption of the SOCKS proxy, affecting all clients relying on the proxy for network connectivity, potentially causing cascading failures in dependent systems.
Likely Case
Service crashes requiring manual restart, causing temporary loss of proxy functionality for connected clients until service is restored.
If Mitigated
Minimal impact if service is behind network filtering or rate limiting that blocks malicious payloads before they reach the vulnerable service.
🎯 Exploit Status
The exploit writeup demonstrates a working proof-of-concept. The attack requires sending specially crafted network packets to the vulnerable service.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch is available. Consider upgrading to a newer version if available, or implement workarounds and monitoring.
🔧 Temporary Workarounds
Network Filtering
linuxImplement network filtering to block malicious payloads before they reach Srelay
iptables -A INPUT -p tcp --dport [srelay_port] -m string --string "malicious_pattern" --algo bm -j DROP
Rate Limiting
linuxApply rate limiting to reduce impact of DoS attempts
iptables -A INPUT -p tcp --dport [srelay_port] -m limit --limit 10/min --limit-burst 20 -j ACCEPT
🧯 If You Can't Patch
- Implement network segmentation to isolate Srelay from untrusted networks
- Deploy intrusion detection/prevention systems to monitor for exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check Srelay version: srelay -v or examine installed package versionCheck Version:
srelay -v 2>&1 | grep -i versionVerify Fix Applied:
Since no patch is available, verify workarounds are in place and monitor for service stability📡 Detection & Monitoring
Log Indicators:
- Srelay service crashes
- Unexpected termination logs
- Connection resets from specific sources
Network Indicators:
- Unusual traffic patterns to Srelay port
- Multiple connection attempts with malformed packets
SIEM Query:
source="srelay.log" AND ("crash" OR "segmentation fault" OR "terminated unexpectedly")