CVE-2025-14196
📋 TL;DR
A buffer overflow vulnerability in H3C Magic B1 routers allows remote attackers to execute arbitrary code by manipulating the 'param' argument in the sub_44de0 function of /goform/aspForm. This affects H3C Magic B1 routers up to version 100R004. The vulnerability is remotely exploitable and a public proof-of-concept exists.
💻 Affected Systems
- H3C Magic B1
⚠️ 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 device compromise, network infiltration, and persistent backdoor installation.
Likely Case
Remote code execution allowing attackers to intercept network traffic, modify router settings, or launch attacks against internal devices.
If Mitigated
Limited impact if network segmentation isolates the router and external access is restricted.
🎯 Exploit Status
Public proof-of-concept code is available on GitHub. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: Yes
Instructions:
No official patch available. Consider replacing affected devices or implementing workarounds.
🔧 Temporary Workarounds
Disable web management interface
allDisable the router's web management interface to prevent access to the vulnerable endpoint.
Check router documentation for disabling web interface commands
Network segmentation and access control
allIsolate the router from untrusted networks and restrict access to management interfaces.
Configure firewall rules to block external access to router management ports (typically 80, 443, 8080)
🧯 If You Can't Patch
- Replace affected H3C Magic B1 routers with supported, patched alternatives
- Implement strict network segmentation to isolate vulnerable routers from critical assets
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at http://[router-ip]/ or via SSH/Telnet if enabled. Version should be displayed in management interface.Check Version:
Check web interface or use: curl http://[router-ip]/ (look for version information in response)Verify Fix Applied:
No official fix available to verify. Verify workarounds by testing that /goform/aspForm endpoint is inaccessible.📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /goform/aspForm with long parameter values
- Multiple failed buffer overflow attempts in router logs
- Unexpected process crashes or restarts
Network Indicators:
- Unusual traffic patterns to router management ports
- Suspicious POST requests to /goform/aspForm with crafted parameters
SIEM Query:
source="router_logs" AND (uri="/goform/aspForm" AND param_length>1000) OR (event="buffer_overflow" OR event="crash")