CVE-2023-46565
📋 TL;DR
A buffer overflow vulnerability in GoBGP's handlingError function allows remote attackers to cause denial of service by sending specially crafted packets. This affects systems running vulnerable versions of GoBGP that process BGP messages from untrusted sources. Network administrators using GoBGP for BGP routing are primarily affected.
💻 Affected Systems
- GoBGP
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, though buffer overflow typically results in DoS in this context.
Likely Case
Denial of service causing GoBGP process crash and network routing disruption.
If Mitigated
Limited impact with proper network segmentation and input validation controls.
🎯 Exploit Status
Buffer overflow in BGP message handling requires sending malformed packets to vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit 419c50dfac578daa4d11256904d0dc182f1a9b22 and later
Vendor Advisory: https://github.com/osrg/gobgp/issues/2725
Restart Required: Yes
Instructions:
1. Update GoBGP to latest version using 'go get -u github.com/osrg/gobgp' 2. Rebuild and redeploy GoBGP 3. Restart GoBGP service
🔧 Temporary Workarounds
Network Segmentation
linuxRestrict BGP peer connections to trusted sources only using firewall rules.
iptables -A INPUT -p tcp --dport 179 -s trusted_peer_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 179 -j DROP
🧯 If You Can't Patch
- Implement strict network access controls to limit BGP peer connections
- Deploy intrusion detection systems to monitor for malformed BGP packets
🔍 How to Verify
Check if Vulnerable:
Check GoBGP version: 'gobgpd --version' and compare with vulnerable commit hashCheck Version:
gobgpd --versionVerify Fix Applied:
Verify running version is commit 419c50dfac578daa4d11256904d0dc182f1a9b22 or later📡 Detection & Monitoring
Log Indicators:
- GoBGP process crashes
- Segmentation fault errors in logs
- Unexpected BGP session resets
Network Indicators:
- Malformed BGP packets to port 179
- Unusual BGP update messages
SIEM Query:
source="gobgp.log" AND ("segmentation fault" OR "panic" OR "crash")