CVE-2024-2815
📋 TL;DR
A critical stack-based buffer overflow vulnerability in Tenda AC15 routers allows remote attackers to execute arbitrary code by manipulating the password parameter in the Cookie Handler. This affects Tenda AC15 routers running firmware version 15.03.20_multi. Attackers can exploit this without authentication to potentially take full control of affected devices.
💻 Affected Systems
- Tenda AC15
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, creation of persistent backdoors, lateral movement to internal networks, and botnet recruitment.
Likely Case
Remote code execution allowing attackers to modify router settings, intercept network 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 attacks remain 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 - vendor did not respond to disclosure
Restart Required: Yes
Instructions:
No official patch available. Consider replacing affected devices with supported models from vendors that provide security updates.
🔧 Temporary Workarounds
Disable Remote Management
allDisable web management interface access from WAN/Internet to prevent remote exploitation
Access router admin interface > Advanced Settings > System Tools > Remote Management > Disable
Network Segmentation
allIsolate affected routers in separate VLANs with strict firewall rules
🧯 If You Can't Patch
- Replace affected Tenda AC15 routers with devices from vendors that provide regular security updates
- Implement strict network segmentation and firewall rules to limit access to router management interfaces
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface: Login > Advanced Settings > System Status > Firmware VersionCheck Version:
Check web interface or use: curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
No official fix available to verify. Workarounds can be verified by testing remote access to management interface.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/execCommand with manipulated password parameter
- Multiple failed authentication attempts followed by buffer overflow patterns
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- Traffic patterns suggesting command and control communication
SIEM Query:
source="router_logs" AND (url="/goform/execCommand" AND (password="*" OR data_size>normal))🔗 References
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/AC15/V15.03.05.18/R7WebsSecurityHandler.md
- https://vuldb.com/?ctiid.257670
- https://vuldb.com/?id.257670
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/AC15/V15.03.05.18/R7WebsSecurityHandler.md
- https://vuldb.com/?ctiid.257670
- https://vuldb.com/?id.257670
