CVE-2024-24324
📋 TL;DR
The TOTOLINK A8000RU router version 7.1cu.643_B20200521 contains a hardcoded root password in the /etc/shadow file, allowing attackers to gain administrative access. This affects all users of this specific router model and firmware version. Attackers can fully compromise the device and potentially pivot to connected networks.
💻 Affected Systems
- TOTOLINK A8000RU
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to network compromise, data interception, malware deployment, and use as a botnet node.
Likely Case
Unauthorized administrative access allowing configuration changes, traffic monitoring, and credential theft.
If Mitigated
Limited impact if device is behind strong perimeter controls and isolated from critical systems.
🎯 Exploit Status
Exploitation requires SSH or telnet access to the device. The hardcoded password can be used directly for authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None known
Restart Required: No
Instructions:
No official patch available. Check TOTOLINK website for firmware updates. If available, download and flash the latest firmware.
🔧 Temporary Workarounds
Change root password
linuxManually change the root password via SSH or web interface
passwd root
Disable remote administration
allTurn off SSH/telnet access from WAN interface
🧯 If You Can't Patch
- Isolate the device in a separate VLAN with strict firewall rules
- Implement network monitoring for suspicious authentication attempts
🔍 How to Verify
Check if Vulnerable:
SSH into the router and check /etc/shadow for hardcoded password. Compare against known hash from vulnerability disclosure.Check Version:
cat /proc/version or check web interface firmware versionVerify Fix Applied:
Verify root password has been changed by attempting to authenticate with old password. Check that /etc/shadow contains a different hash.📡 Detection & Monitoring
Log Indicators:
- Failed SSH authentication attempts followed by successful root login
- Multiple root login attempts from unusual sources
Network Indicators:
- SSH or telnet connections to router from unexpected IPs
- Unusual outbound traffic from router
SIEM Query:
source="router" (event="authentication success" user="root") OR (event="ssh connection" src_ip!="trusted_network")