CVE-2023-43202
📋 TL;DR
This CVE describes a critical command injection vulnerability in D-LINK DWL-6610 access points running firmware version 4.3.0.8B003C. Attackers can execute arbitrary commands on the device by manipulating the TFTP filename parameter during packet capture downloads. Organizations using these specific D-Link access points are affected.
💻 Affected Systems
- D-LINK DWL-6610
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise leading to network pivot, data exfiltration, or deployment of persistent malware on the access point.
Likely Case
Unauthorized command execution allowing attackers to modify device configuration, intercept network traffic, or disrupt network services.
If Mitigated
Limited impact if device is isolated from sensitive networks and proper network segmentation is in place.
🎯 Exploit Status
Exploitation requires access to the web management interface, but the vulnerability is well-documented in public repositories.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check D-Link security advisories for firmware updates. 2. Download latest firmware from official D-Link support site. 3. Upload firmware via web interface. 4. Reboot device after update.
🔧 Temporary Workarounds
Disable remote management
allPrevent external access to the vulnerable web interface
Access web interface > Administration > Remote Management > Disable
Network segmentation
allIsolate DWL-6610 devices from sensitive networks
🧯 If You Can't Patch
- Implement strict firewall rules to limit access to the device management interface
- Monitor network traffic to/from the device for suspicious TFTP requests
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface: System > Firmware InformationCheck Version:
Not applicable - check via web interfaceVerify Fix Applied:
Verify firmware version is newer than 4.3.0.8B003C📡 Detection & Monitoring
Log Indicators:
- Unusual TFTP requests in device logs
- Unexpected command execution entries
Network Indicators:
- TFTP traffic to device management interface with unusual filenames
- Outbound connections from device to unexpected destinations
SIEM Query:
source_ip="DWL-6610_IP" AND (protocol="TFTP" OR command_execution="true")