CVE-2024-29366
📋 TL;DR
A command injection vulnerability in the cgibin binary of DIR-845L router firmware allows attackers to execute arbitrary commands with root privileges. This affects all DIR-845L routers running firmware version 1.01KRb03 or earlier. Attackers can potentially take full control of affected routers.
💻 Affected Systems
- D-Link DIR-845L Wireless Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete router compromise allowing attackers to intercept all network traffic, install persistent malware, pivot to internal networks, and use the router as part of a botnet.
Likely Case
Router takeover enabling traffic interception, DNS hijacking, credential theft, and lateral movement into connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access, though internal attackers could still exploit.
🎯 Exploit Status
Public exploit details available on GitHub. Exploitation requires sending crafted HTTP requests to the router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None available
Vendor Advisory: https://www.dlink.com/en/security-bulletin/
Restart Required: No
Instructions:
No official patch available. Check D-Link security bulletin for updates. Consider replacing affected hardware.
🔧 Temporary Workarounds
Disable Remote Management
allDisable remote administration/management features to prevent WAN-side exploitation
Access router admin interface -> Advanced -> Remote Management -> Disable
Network Segmentation
allIsolate router management interface from untrusted networks
Configure firewall rules to restrict access to router admin interface (typically port 80/443)
🧯 If You Can't Patch
- Replace affected DIR-845L routers with supported models from D-Link or other vendors
- Implement strict network access controls to limit who can reach the router's management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via admin interface: Status -> Device Info -> Firmware VersionCheck Version:
Check via web interface or SSH if enabled: cat /etc/versionVerify Fix Applied:
No fix available to verify. Monitor D-Link security bulletins for patch announcements.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP POST requests to cgibin endpoints
- Suspicious command execution in router logs
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Unexpected port scans originating from router
SIEM Query:
source="router_logs" AND (uri="*cgi-bin*" AND method="POST" AND (user_agent="*curl*" OR user_agent="*wget*" OR params="*;*" OR params="*|*" OR params="*`*"))