CVE-2024-44334
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on affected D-Link routers due to insufficient input filtering in the upgrade_filter.asp CGI handler. Attackers can exploit this to gain full control of the device. Organizations using the listed D-Link router models with vulnerable firmware versions are affected.
💻 Affected Systems
- D-Link DI-7003GV2
- D-Link DI-7100G+V2
- D-Link DI-7100GV2
- D-Link DI-7200GV2
- D-Link DI-7300G+V2
- D-Link DI-7400G+V2
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router with persistent backdoor installation, credential theft, network pivoting to internal systems, and disruption of network services.
Likely Case
Router takeover leading to network traffic interception, DNS manipulation, credential harvesting, and lateral movement within the network.
If Mitigated
Limited impact if routers are behind firewalls with strict inbound filtering and network segmentation prevents lateral movement.
🎯 Exploit Status
Public proof-of-concept code exists in the referenced GitHub gist. The vulnerability requires no authentication and has straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check D-Link security bulletin for latest patched versions
Vendor Advisory: https://www.dlink.com/en/security-bulletin/
Restart Required: Yes
Instructions:
1. Visit D-Link security bulletin for affected models. 2. Download latest firmware for your specific model. 3. Log into router admin interface. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot router after upgrade completes.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to router web interface from untrusted networks
Firewall Rules
linuxBlock external access to router management ports (typically 80, 443, 8080)
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
iptables -A INPUT -p tcp --dport 8080 -j DROP
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict access controls
- Implement network monitoring for suspicious traffic to/from router management interface
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under System Status or Firmware Upgrade sectionCheck Version:
curl -k https://[router-ip]/cgi-bin/upgrade_filter.asp (do not run on production systems)Verify Fix Applied:
Verify firmware version has been updated to a version newer than v24.04.18D1/E1📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cgi-bin/upgrade_filter.asp
- Multiple failed login attempts followed by successful access
- Commands like 'wget', 'curl', or 'nc' in system logs
Network Indicators:
- HTTP POST requests to router IP on port 80/443 with command injection patterns
- Outbound connections from router to suspicious IPs
SIEM Query:
source="router_logs" AND (uri="/cgi-bin/upgrade_filter.asp" OR cmd="*;*" OR cmd="*|*")