CVE-2024-23624
📋 TL;DR
An unauthenticated command injection vulnerability in the gena.cgi module of D-Link DAP-1650 devices allows remote attackers to execute arbitrary commands as root. This affects all D-Link DAP-1650 devices with vulnerable firmware versions. Attackers can gain complete control over affected devices without authentication.
💻 Affected Systems
- D-Link DAP-1650
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent backdoors, pivot to internal networks, intercept traffic, or use device as botnet node.
Likely Case
Remote code execution leading to device takeover, credential theft, network reconnaissance, and potential lateral movement.
If Mitigated
Limited impact if device is behind firewall with strict inbound rules and network segmentation.
🎯 Exploit Status
Detailed technical analysis and exploitation details published in Exodus Intelligence blog. Simple HTTP request with crafted parameters can trigger command injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown - Check D-Link security advisories
Vendor Advisory: Not provided in references
Restart Required: Yes
Instructions:
1. Check D-Link security portal for firmware updates. 2. Download latest firmware for DAP-1650. 3. Log into device web interface. 4. Navigate to firmware update section. 5. Upload and apply new firmware. 6. Reboot device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate DAP-1650 devices from internet and restrict access to management interface
Firewall Rules
linuxBlock external access to device web interface (typically port 80/443)
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Replace vulnerable devices with supported models
- Implement strict network access controls and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check if device responds to crafted HTTP POST requests to /gena.cgi with command injection payloads. Monitor for unexpected command execution.Check Version:
Log into web interface and check firmware version in System Status or Administration sectionVerify Fix Applied:
Test with same exploitation method after firmware update - should no longer execute injected commands.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /gena.cgi
- Unexpected command execution in system logs
- Multiple failed login attempts followed by successful command execution
Network Indicators:
- HTTP POST requests to /gena.cgi with shell metacharacters in parameters
- Outbound connections from device to unknown IPs
SIEM Query:
source="firewall" AND dest_port=80 AND uri_path="/gena.cgi" AND (http_method="POST" AND (param="*;*" OR param="*|*" OR param="*`*"))