CVE-2024-57579
📋 TL;DR
This CVE describes a stack overflow vulnerability in Tenda AC18 routers that allows remote code execution. Attackers can exploit the limitSpeedUp parameter in the formSetClientState function to execute arbitrary code with root privileges. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- Tenda AC18
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing persistent backdoor installation, network traffic interception, lateral movement to connected devices, and bricking of the device.
Likely Case
Remote code execution leading to router compromise, credential theft, DNS hijacking, and botnet recruitment.
If Mitigated
Limited impact if the router is not internet-facing and has strict network segmentation, though local network attacks remain possible.
🎯 Exploit Status
The GitHub reference contains proof-of-concept code demonstrating exploitation. The vulnerability requires no authentication and has a simple exploitation path.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check Tenda's official website for firmware updates. If available, download the latest firmware, log into the router's admin interface, navigate to System Tools > Firmware Upgrade, upload the new firmware file, and follow the upgrade process.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to the router's web interface
Network Segmentation
allIsolate the router on a separate VLAN to limit lateral movement
🧯 If You Can't Patch
- Replace the router with a different model that receives security updates
- Implement strict firewall rules to block all inbound traffic to the router's management interface
🔍 How to Verify
Check if Vulnerable:
Check the firmware version in the router's web interface under System Status or System Tools. If the version is V15.03.05.19, the device is vulnerable.Check Version:
Connect to the router's web interface and navigate to System Status page, or use curl: curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
After updating firmware, verify the version number has changed from V15.03.05.19 to a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to /goform/setClientState with large limitSpeedUp parameter values
- Multiple failed exploitation attempts showing buffer overflow patterns
Network Indicators:
- Unusual outbound connections from the router to unknown IP addresses
- DNS queries to suspicious domains from the router itself
SIEM Query:
source="router_logs" AND (uri_path="/goform/setClientState" AND http_method="POST" AND content_length>1000)