CVE-2025-14015
📋 TL;DR
A buffer overflow vulnerability in H3C Magic B0 routers allows remote attackers to execute arbitrary code by manipulating the param argument in the EditWlanMacList function. This affects H3C Magic B0 routers up to version 100R002. The vulnerability is remotely exploitable and a public exploit exists.
💻 Affected Systems
- H3C Magic B0
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, network infiltration, and potential lateral movement to connected systems.
Likely Case
Remote code execution allowing attackers to install malware, create backdoors, or disrupt network services.
If Mitigated
Limited impact if network segmentation prevents access to vulnerable interfaces and proper monitoring detects exploitation attempts.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easily weaponizable by attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
1. Contact H3C support for patch availability
2. If patch is available, download from official H3C portal
3. Upload firmware to router via web interface
4. Reboot router after installation
🔧 Temporary Workarounds
Block Access to Vulnerable Endpoint
linuxUse firewall rules to block external access to /goform/aspForm endpoint
iptables -A INPUT -p tcp --dport 80 -m string --string "/goform/aspForm" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/goform/aspForm" --algo bm -j DROP
Disable Remote Management
allTurn off remote administration features in router settings
🧯 If You Can't Patch
- Isolate vulnerable routers in separate VLAN with strict access controls
- Implement network monitoring for exploitation attempts targeting /goform/aspForm
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at System Status > Firmware VersionCheck Version:
curl -s http://router-ip/status.cgi | grep -i firmwareVerify Fix Applied:
Verify firmware version is above 100R002 after applying any available patch📡 Detection & Monitoring
Log Indicators:
- HTTP POST requests to /goform/aspForm with large param values
- Unusual process creation or memory errors in router logs
Network Indicators:
- HTTP traffic to router IP on port 80/443 containing EditWlanMacList function calls
- Unusual outbound connections from router after exploitation
SIEM Query:
source="router_logs" AND (url="/goform/aspForm" OR message="*buffer overflow*")