CVE-2024-2902
📋 TL;DR
This is a critical stack-based buffer overflow vulnerability in Tenda AC7 routers that allows remote attackers to execute arbitrary code by manipulating the shareSpeed parameter. It affects Tenda AC7 firmware version 15.03.06.44. Attackers can exploit this without authentication to potentially take full control of affected devices.
💻 Affected Systems
- Tenda AC7
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, persistent backdoor installation, and lateral movement to other network devices.
Likely Case
Device takeover enabling traffic interception, credential theft, and participation in botnets.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Exploit details are publicly available on GitHub. The vulnerability requires no authentication and has a straightforward exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: Yes
Instructions:
1. Check Tenda's official website for firmware updates. 2. If an update is available, download the firmware file. 3. Log into the router's web interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install the new firmware. 6. Reboot the router.
🔧 Temporary Workarounds
Disable Guest WiFi
allDisable the guest WiFi feature to prevent access to the vulnerable function.
Restrict Management Interface Access
allConfigure firewall rules to restrict access to the router's web management interface (typically port 80/443).
🧯 If You Can't Patch
- Segment affected routers on isolated VLANs to limit lateral movement
- Implement strict network monitoring for unusual traffic patterns from routers
🔍 How to Verify
Check if Vulnerable:
Check the router's firmware version via the web interface at System Status > Firmware Version. If it shows 15.03.06.44, the device is vulnerable.Check Version:
Not applicable - check via web interface or router admin panelVerify Fix Applied:
After updating, verify the firmware version has changed from 15.03.06.44 to a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /goform/WifiGuestSet with manipulated shareSpeed parameter
- Router crash/reboot logs
Network Indicators:
- Unusual outbound connections from router to unknown IPs
- Traffic spikes from router
SIEM Query:
source="router_logs" AND (url="/goform/WifiGuestSet" OR message="buffer overflow")🔗 References
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/AC7/v1/fromSetWifiGusetBasic.md
- https://vuldb.com/?ctiid.257945
- https://vuldb.com/?id.257945
- https://vuldb.com/?submit.300449
- https://github.com/abcdefg-png/IoT-vulnerable/blob/main/Tenda/AC7/v1/fromSetWifiGusetBasic.md
- https://vuldb.com/?ctiid.257945
- https://vuldb.com/?id.257945
- https://vuldb.com/?submit.300449
