CVE-2024-2898
📋 TL;DR
This critical vulnerability in Tenda AC7 routers allows remote attackers to execute arbitrary code via a stack-based buffer overflow in the fromSetRouteStatic function. Attackers can exploit this without authentication to potentially take full control of affected devices. All users running vulnerable firmware versions are at risk.
💻 Affected Systems
- Tenda AC7
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise leading to persistent backdoor installation, network traffic interception, lateral movement to other devices, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept traffic, or use the device as a pivot point for further attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering, though internal network compromise remains possible.
🎯 Exploit Status
Public exploit details are available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ 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 and monitor their security advisories.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Tenda AC7 routers in a separate VLAN with strict firewall rules limiting inbound access.
Access Control
allDisable remote administration and restrict management interface access to trusted internal IPs only.
🧯 If You Can't Patch
- Replace affected Tenda AC7 routers with devices from vendors that provide timely security updates
- Implement network monitoring and intrusion detection specifically for buffer overflow attempts targeting the /goform/SetStaticRouteCfg endpoint
🔍 How to Verify
Check if Vulnerable:
Check router web interface or CLI for firmware version. If version is 15.03.06.44, the device is vulnerable.Check Version:
Check router web interface at http://[router-ip]/ or use telnet/ssh if enabled: show versionVerify Fix Applied:
Verify firmware version has been updated to a version later than 15.03.06.44 (when available).📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/SetStaticRouteCfg
- Router crash/reboot logs
- Buffer overflow error messages in system logs
Network Indicators:
- HTTP POST requests to router IP on port 80/443 with large payloads to /goform/SetStaticRouteCfg
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND (uri="/goform/SetStaticRouteCfg" OR message="*buffer overflow*" OR message="*segmentation fault*")🔗 References
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/AC7/v1/fromSetRouteStatic.md
- https://vuldb.com/?ctiid.257941
- https://vuldb.com/?id.257941
- https://vuldb.com/?submit.300361
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/AC7/v1/fromSetRouteStatic.md
- https://vuldb.com/?ctiid.257941
- https://vuldb.com/?id.257941
- https://vuldb.com/?submit.300361
