CVE-2023-42406
📋 TL;DR
This CVE describes a critical SQL injection vulnerability in D-Link DAR-7000 Online Behavior Audit Gateway. Attackers can exploit the editrole.php component to execute arbitrary SQL commands, potentially leading to data theft, system compromise, and remote code execution. Organizations using D-Link DAR-7000 gateways are affected.
💻 Affected Systems
- D-Link DAR-7000 Online Behavior Audit Gateway
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative access, sensitive data exfiltration, and persistent backdoor installation leading to network-wide compromise.
Likely Case
Unauthorized access to sensitive audit logs and user data, privilege escalation, and potential lateral movement within the network.
If Mitigated
Limited impact with proper network segmentation, WAF protection, and input validation preventing successful exploitation.
🎯 Exploit Status
Multiple public GitHub repositories contain proof-of-concept exploit code. The SQL injection appears to be straightforward with minimal technical barriers to exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch is currently available. Monitor D-Link security advisories for updates. Consider workarounds or replacement if patching is not possible.
🔧 Temporary Workarounds
Network Access Control
linuxRestrict access to the DAR-7000 management interface to trusted IP addresses only
iptables -A INPUT -p tcp --dport 80 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Web Application Firewall
allDeploy a WAF with SQL injection protection rules in front of the DAR-7000
🧯 If You Can't Patch
- Isolate the DAR-7000 on a separate VLAN with strict firewall rules limiting outbound connections
- Disable the web management interface if not required and use alternative management methods
🔍 How to Verify
Check if Vulnerable:
Check if the device responds to SQL injection payloads at /sysmanage/editrole.php endpoint. Use tools like sqlmap with caution: sqlmap -u 'http://target/sysmanage/editrole.php' --data='parameter=value'Check Version:
Check web interface login page or system information page for firmware version V31R02B1413CVerify Fix Applied:
Test the editrole.php endpoint with SQL injection payloads to confirm they are properly sanitized or blocked📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in web server logs
- Multiple failed login attempts followed by successful access
- Requests to editrole.php with SQL keywords (SELECT, UNION, etc.)
Network Indicators:
- Unusual outbound connections from DAR-7000 to external IPs
- Large data transfers from the device outside normal patterns
SIEM Query:
source="DAR-7000-logs" AND (url="*editrole.php*" AND (message="*SQL*" OR message="*syntax*" OR message="*union*"))🔗 References
- https://github.com/1dreamGN/CVE/blob/main/CVE-2023-42406.md
- https://github.com/flyyue2001/cve/blob/main/D-LINK%20-DAR-7000_sql_:sysmanage:editrole.php.md
- https://github.com/1dreamGN/CVE/blob/main/CVE-2023-42406.md
- https://github.com/flyyue2001/cve/blob/main/D-LINK%20-DAR-7000_sql_:sysmanage:editrole.php.md
