CVE-2024-32303
📋 TL;DR
This CVE describes a stack overflow vulnerability in Tenda AC15 router firmware versions v15.03.20_multi, v15.03.05.19, and v15.03.05.18. The vulnerability exists in the fromWizardHandle function via the PPW parameter, potentially allowing remote code execution. Users of affected Tenda AC15 router firmware versions are at risk.
💻 Affected Systems
- Tenda AC15
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full control of the router, enabling persistent access, network traffic interception, lateral movement to internal devices, and firmware modification.
Likely Case
Router compromise leading to denial of service, credential theft from network traffic, or use as a botnet node.
If Mitigated
Limited impact with proper network segmentation and firewall rules preventing external access to router admin interface.
🎯 Exploit Status
Public GitHub repository contains detailed vulnerability analysis and proof-of-concept code. Exploitation appears straightforward via crafted HTTP requests to the web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check Tenda official website for firmware updates. If available, download latest firmware for AC15 model and apply through router web interface under System Tools > Firmware Upgrade.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Network Segmentation
allIsolate router management interface to separate VLAN
🧯 If You Can't Patch
- Replace affected router with different model or vendor
- Implement strict firewall rules blocking all inbound traffic to router IP except from trusted management stations
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface under System Status > Firmware Version. If version matches affected list, device is vulnerable.Check Version:
curl -s http://router-ip/goform/getStatus | grep versionVerify Fix Applied:
After firmware update, verify version no longer matches affected versions. Test by attempting to access fromWizardHandle endpoint with malformed PPW parameter.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts to router web interface
- Unusual HTTP POST requests to /goform/fromWizardHandle with long PPW parameter
Network Indicators:
- Unusual outbound connections from router IP
- HTTP traffic to router on non-standard ports
SIEM Query:
source="router-logs" AND (uri="/goform/fromWizardHandle" AND ppw_length>100)