CVE-2024-40516
📋 TL;DR
A remote code execution vulnerability in H3C Magic RC3000 routers allows attackers to execute arbitrary code via the routing functionality. This affects H3C Magic RC3000 devices running vulnerable firmware versions. Attackers can potentially take full control of affected routers.
💻 Affected Systems
- H3C Magic RC3000
⚠️ 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
Complete compromise of router with attacker gaining persistent access, intercepting all network traffic, pivoting to internal networks, and using router as attack platform.
Likely Case
Router compromise leading to network traffic interception, credential theft, and potential lateral movement to connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public proof-of-concept available in GitHub gist; exploit appears straightforward based on routing functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check H3C official website for firmware updates. 2. Download latest firmware. 3. Access router admin interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Disable remote management
allDisable WAN access to router administration interface
Network segmentation
allPlace router in isolated network segment with strict firewall rules
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Implement strict network monitoring and anomaly detection for router traffic
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is RC3000V100R009, device is vulnerable.Check Version:
Check via router web interface or SSH: show version (if SSH enabled)Verify Fix Applied:
Verify firmware version has been updated to a version later than RC3000V100R009.📡 Detection & Monitoring
Log Indicators:
- Unusual routing configuration changes
- Unexpected firmware modification attempts
- Suspicious admin access patterns
Network Indicators:
- Unusual outbound connections from router
- Traffic redirection anomalies
- Port scanning originating from router
SIEM Query:
source_ip=router_ip AND (event_type="configuration_change" OR event_type="firmware_update")