CVE-2024-22651
📋 TL;DR
A command injection vulnerability in the ssdpcgi_main function of the cgibin binary in D-Link DIR-815 router firmware allows remote attackers to execute arbitrary commands with root privileges. This affects all users running vulnerable firmware versions of the DIR-815 router. The vulnerability is remotely exploitable without authentication.
💻 Affected Systems
- D-Link DIR-815
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to install persistent backdoors, intercept all network traffic, pivot to internal networks, and use the router for botnet activities.
Likely Case
Router takeover leading to DNS hijacking, credential theft from network traffic, and installation of malware on connected devices.
If Mitigated
Limited impact if router is behind firewall with restricted WAN access, though internal network attacks remain possible.
🎯 Exploit Status
Proof of concept available in GitHub repository. Exploitation requires sending crafted HTTP requests to the router's web interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check D-Link support website for firmware updates. If no update exists, consider workarounds or replacement.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router web interface
Login to router admin panel -> Advanced -> Remote Management -> Disable
Change Default Admin Credentials
allUse strong unique credentials for router administration
Login to router admin panel -> Tools -> Admin -> Set strong password
🧯 If You Can't Patch
- Replace router with supported model
- Place router behind dedicated firewall with strict inbound rules
🔍 How to Verify
Check if Vulnerable:
Check firmware version in router admin panel (typically under Status or Tools section). If version is 1.04, device is vulnerable.Check Version:
curl -s http://router-ip/status.cgi | grep firmware or check web interface manuallyVerify Fix Applied:
Verify firmware version is updated to a version later than 1.04. No known patched version exists as of current information.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /ssdpcgi or /cgi-bin endpoints
- Commands containing shell metacharacters in HTTP parameters
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unusual outbound connections from router
- DNS queries to suspicious domains
- Unexpected SSH/Telnet connections originating from router
SIEM Query:
source="router_logs" AND (uri="/ssdpcgi" OR uri="/cgi-bin") AND (param="*;*" OR param="*|*" OR param="*`*" OR param="*$(*")