CVE-2025-4446
📋 TL;DR
A critical buffer overflow vulnerability in H3C GR-5400AX routers allows attackers to execute arbitrary code by manipulating the param argument in the Edit_List_SSID function. This affects all users of H3C GR-5400AX routers up to version 100R008. Attackers must be on the same local network to exploit this vulnerability.
💻 Affected Systems
- H3C GR-5400AX
⚠️ 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 system compromise leading to router takeover, credential theft, network traffic interception, and lateral movement to other devices on the network.
Likely Case
Router compromise allowing attackers to modify network settings, intercept traffic, and potentially install persistent backdoors.
If Mitigated
Limited impact with proper network segmentation and access controls preventing local network attackers from reaching vulnerable interfaces.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repository. Exploitation requires local network access but no authentication. Buffer overflow manipulation is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check H3C official website for security advisories
2. If patch is released, download firmware update
3. Backup router configuration
4. Upload and apply firmware update
5. Reboot router
6. Verify firmware version is above 100R008
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface to separate VLAN with strict access controls
Access Control Lists
allImplement strict ACLs to limit access to router management interface
🧯 If You Can't Patch
- Replace affected routers with updated models or different vendors
- Implement network monitoring and intrusion detection for suspicious router access attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or CLI. If version is 100R008 or lower, the device is vulnerable.Check Version:
Login to router CLI and use 'display version' commandVerify Fix Applied:
Verify firmware version is above 100R008. Test Edit_List_SSID function with various param inputs to ensure no buffer overflow occurs.📡 Detection & Monitoring
Log Indicators:
- Multiple failed attempts to access /goform/aspForm
- Unusual param values in Edit_List_SSID requests
- Router crash or reboot events
Network Indicators:
- Unusual HTTP POST requests to router management interface
- Traffic patterns suggesting buffer overflow attempts
SIEM Query:
source="router_logs" AND (uri="/goform/aspForm" OR function="Edit_List_SSID") AND param_length>normal_threshold