CVE-2023-53974
📋 TL;DR
D-Link DSL-124 routers running ME_1.00 firmware contain an unauthenticated configuration file disclosure vulnerability. Attackers can retrieve complete backup files containing sensitive network credentials and system configurations via a specific POST request. This affects all users of vulnerable D-Link DSL-124 routers with the affected firmware.
💻 Affected Systems
- D-Link DSL-124
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full network access, steal credentials, reconfigure router for malicious purposes, or use as pivot point for internal attacks.
Likely Case
Attackers steal Wi-Fi passwords, admin credentials, and network configuration details for unauthorized access or reconnaissance.
If Mitigated
Limited to information disclosure without ability to modify configurations or execute code.
🎯 Exploit Status
Exploit requires sending a single POST request to the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://dlinkmea.com/index.php/product/details?det=dU1iNFc4cWRsdUpjWEpETFlSeFlZdz09
Restart Required: No
Instructions:
No official patch available. Check vendor website for firmware updates.
🔧 Temporary Workarounds
Disable remote management
allDisable remote administration/management features to prevent external exploitation
Network segmentation
allPlace router in isolated network segment with strict firewall rules
🧯 If You Can't Patch
- Replace affected hardware with supported, patched alternatives
- Implement network monitoring for suspicious POST requests to router configuration endpoints
🔍 How to Verify
Check if Vulnerable:
Send POST request to router's configuration endpoint and check if backup file is returned without authenticationCheck Version:
Check router web interface or use nmap/router scanning tools to identify firmware versionVerify Fix Applied:
Attempt the exploit after applying workarounds to confirm access is blocked📡 Detection & Monitoring
Log Indicators:
- Unauthenticated POST requests to configuration/backup endpoints
- Large file downloads from router management interface
Network Indicators:
- POST requests to router IP on port 80/443 with specific backup-related parameters
- Unusual outbound traffic from router
SIEM Query:
source_ip=router_ip AND http_method=POST AND (uri_contains='backup' OR uri_contains='config') AND auth_status='failed'🔗 References
- https://dlinkmea.com/index.php/product/details?det=dU1iNFc4cWRsdUpjWEpETFlSeFlZdz09
- https://www.dlink.com
- https://www.exploit-db.com/exploits/51129
- https://www.vulncheck.com/advisories/d-link-dsl-me-backup-configuration-file-disclosure-via-unauthenticated-request
- https://www.exploit-db.com/exploits/51129
