CVE-2024-42743
📋 TL;DR
This CVE describes an OS command injection vulnerability in TOTOLINK X5000r routers that allows authenticated attackers to execute arbitrary commands on the device. The vulnerability exists in the setSyslogCfg function within the cgi-bin/cstecgi.cgi file. Organizations using affected TOTOLINK X5000r routers with the vulnerable firmware version are at risk.
💻 Affected Systems
- TOTOLINK X5000r
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router allowing attackers to establish persistence, pivot to internal networks, intercept/modify traffic, or use the device as part of a botnet.
Likely Case
Attackers gain shell access to the router, enabling them to modify configurations, steal credentials, or launch attacks against internal systems.
If Mitigated
Limited impact due to network segmentation, strong authentication controls, and monitoring that detects exploitation attempts.
🎯 Exploit Status
Exploit details are publicly available in GitHub repository. Requires authenticated access to the router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check TOTOLINK official website for firmware updates. If available, download and apply the latest firmware through the router's web interface.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to the router's web interface
Network segmentation
allIsolate the router from critical internal networks
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the router's management interface
- Monitor for suspicious activity and command execution attempts on the router
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface. If version matches v9.1.0cu.2350_b20230313, device is vulnerable.Check Version:
Check router web interface under System Status or Firmware Update sectionVerify Fix Applied:
Verify firmware has been updated to a version newer than v9.1.0cu.2350_b20230313📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Multiple failed authentication attempts followed by successful login
- Suspicious entries in syslog configuration
Network Indicators:
- Unusual outbound connections from router
- Traffic to unexpected destinations
- Port scanning originating from router
SIEM Query:
source="router" AND (event="command_injection" OR event="syslog_config_change" OR cmd="*" AND user="admin")