CVE-2024-5295
📋 TL;DR
This vulnerability allows network-adjacent attackers to execute arbitrary commands as root on D-Link G416 wireless routers without authentication. Attackers can exploit the HTTP service on port 80 by injecting malicious commands into user-supplied input that gets executed by the system. All users of affected D-Link G416 routers are at risk.
💻 Affected Systems
- D-Link G416 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 brick the device.
Likely Case
Router takeover leading to DNS hijacking, credential theft from network traffic, and creation of botnet nodes.
If Mitigated
Limited impact if router is isolated from critical networks and has strict firewall rules blocking internal access.
🎯 Exploit Status
ZDI has published advisory with technical details. No public exploit code observed yet, but vulnerability is trivial to weaponize.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check D-Link security advisory for specific firmware version
Vendor Advisory: https://support.dlink.com/security/
Restart Required: Yes
Instructions:
1. Log into router admin interface. 2. Navigate to firmware update section. 3. Download latest firmware from D-Link support site. 4. Upload and apply firmware update. 5. Reboot router.
🔧 Temporary Workarounds
Disable HTTP management interface
allDisable the vulnerable HTTP service on port 80 and use HTTPS or local console management only
Router-specific: Disable HTTP in admin interface under Management > Remote Management
Network segmentation
linuxIsolate router management interface from general network access
iptables -A INPUT -p tcp --dport 80 -j DROP (on router if possible)
Configure firewall to block port 80 access to router from internal networks
🧯 If You Can't Patch
- Replace affected router with different model
- Place router behind dedicated firewall with strict access controls to port 80
🔍 How to Verify
Check if Vulnerable:
Check router firmware version against D-Link security advisory. If unable to patch, test with controlled command injection payload (e.g., ping to controlled server).Check Version:
Router-specific: Check via admin interface under Maintenance > Firmware or via CLI if availableVerify Fix Applied:
Verify firmware version matches patched version from D-Link advisory. Test that command injection attempts no longer execute.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to router management interface with shell metacharacters
- Unexpected system command execution in router logs
- Multiple failed exploit attempts
Network Indicators:
- HTTP requests to router port 80 containing command injection patterns (;, |, &, $, etc.)
- Outbound connections from router to unexpected destinations
SIEM Query:
source="router_logs" AND (http_request="*;*" OR http_request="*|*" OR http_request="*`*" OR http_request="*$(*")