CVE-2022-24995
📋 TL;DR
This vulnerability is a stack overflow in Tenda AX3 routers running firmware version 16.03.12.10_CN. Attackers can send specially crafted time parameters to cause a Denial of Service (DoS), potentially crashing the router. This affects users of Tenda AX3 routers with the vulnerable firmware version.
💻 Affected Systems
- Tenda AX3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router crash requiring physical reboot, potentially allowing remote code execution if the overflow can be controlled to execute arbitrary code.
Likely Case
Router becomes unresponsive, requiring reboot to restore functionality, disrupting network connectivity for all connected devices.
If Mitigated
Limited to temporary service disruption if proper network segmentation and access controls prevent exploitation attempts.
🎯 Exploit Status
Exploit code is publicly available in GitHub repositories, making this easily weaponizable.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates
2. Download latest firmware for AX3
3. Access router admin interface
4. Navigate to firmware update section
5. Upload and apply new firmware
6. Reboot router
🔧 Temporary Workarounds
Network Segmentation
allIsolate router management interface from untrusted networks
Access Control Lists
allRestrict access to router management interface to trusted IPs only
🧯 If You Can't Patch
- Replace vulnerable router with updated model or different vendor
- Implement network monitoring for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface; if version is 16.03.12.10_CN, device is vulnerable.Check Version:
Login to router admin interface and check System Status or Firmware Information pageVerify Fix Applied:
Verify firmware version has been updated to a version later than 16.03.12.10_CN.📡 Detection & Monitoring
Log Indicators:
- Router crash logs
- Unexpected reboots
- Failed authentication attempts to management interface
Network Indicators:
- Unusual traffic to router management port (typically 80/443)
- Malformed HTTP requests with time parameters
SIEM Query:
source="router.log" AND ("crash" OR "reboot" OR "fromSetSysTime")