CVE-2023-41186
📋 TL;DR
This vulnerability allows network-adjacent attackers to access D-Link DAP-1325 router functionality without authentication via the CGI interface. Attackers can exploit this to disclose stored credentials and potentially gain further access. Only D-Link DAP-1325 router users are affected.
💻 Affected Systems
- D-Link DAP-1325
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full administrative control of the router, steal all stored credentials, pivot to internal networks, and deploy persistent malware.
Likely Case
Attackers access router configuration, obtain Wi-Fi credentials, and potentially modify network settings.
If Mitigated
If isolated from untrusted networks, impact is limited to credential disclosure within the local network segment.
🎯 Exploit Status
Exploitation requires network access but no authentication. Simple HTTP requests to CGI endpoints can trigger the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware version 1.11B02
Vendor Advisory: https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10351
Restart Required: Yes
Instructions:
1. Download firmware 1.11B02 from D-Link support site. 2. Log into router admin interface. 3. Navigate to firmware update section. 4. Upload and apply the new firmware. 5. Wait for router to restart automatically.
🔧 Temporary Workarounds
Network segmentation
allIsolate DAP-1325 routers on separate VLANs from untrusted devices
Access control lists
allImplement firewall rules to restrict access to router management interface
🧯 If You Can't Patch
- Replace vulnerable DAP-1325 routers with updated models or different vendors
- Disable remote management and ensure physical security of router location
🔍 How to Verify
Check if Vulnerable:
Check firmware version via router web interface. If version is earlier than 1.11B02, device is vulnerable.Check Version:
Connect to router web interface and navigate to System Status or Firmware Information pageVerify Fix Applied:
After updating, verify firmware version shows 1.11B02 in admin interface.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access to CGI endpoints in router logs
- Multiple failed authentication attempts followed by successful CGI access
Network Indicators:
- HTTP requests to router CGI endpoints from unauthorized IP addresses
- Unusual traffic patterns to router management interface
SIEM Query:
source="router_logs" AND (uri="*.cgi" OR uri="*/cgi-bin/*") AND auth_status="failed"