CVE-2024-4120
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Tenda W15E routers allows remote attackers to execute arbitrary code by sending specially crafted requests to the formIPMacBindModify function. This affects all users of Tenda W15E routers running version 15.11.0.14. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- Tenda W15E
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network traffic interception, and lateral movement into connected devices.
Likely Case
Router compromise leading to denial of service, DNS hijacking, or credential harvesting from connected devices.
If Mitigated
Limited impact if device is behind firewall with restricted WAN access and proper network segmentation.
🎯 Exploit Status
Public exploit code is available, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
No official patch available. Contact Tenda support for firmware updates or replace affected devices.
🔧 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 Tenda W15E routers with different models or brands
- Implement strict network monitoring and intrusion detection for suspicious traffic to router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface at 192.168.0.1 or 192.168.1.1, login and navigate to System Status or About page.Check Version:
No CLI command available. Must use web interface.Verify Fix Applied:
Verify firmware version has been updated to a version newer than 15.11.0.14 (if available).📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /goform/modifyIpMacBind with long parameter values
- Router crash/reboot logs
- Unusual process execution
Network Indicators:
- HTTP POST requests to router IP on port 80 targeting /goform/modifyIpMacBind with unusually long parameters
SIEM Query:
http.method:POST AND http.uri:"/goform/modifyIpMacBind" AND (http.param_length > 100 OR http.request_size > 500)🔗 References
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/W15Ev1.0/formIPMacBindModify.md
- https://vuldb.com/?ctiid.261863
- https://vuldb.com/?id.261863
- https://vuldb.com/?submit.317825
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/W15Ev1.0/formIPMacBindModify.md
- https://vuldb.com/?ctiid.261863
- https://vuldb.com/?id.261863
- https://vuldb.com/?submit.317825
