CVE-2024-10193
📋 TL;DR
This critical vulnerability allows remote attackers to execute arbitrary commands on affected WAVLINK routers by injecting malicious input into the DDNS parameter of the ping_ddns function. Attackers can gain full control of the device without authentication. All users of affected WAVLINK router models with firmware up to October 28, 2022 are vulnerable.
💻 Affected Systems
- WAVLINK WN530H4
- WAVLINK WN530HG4
- WAVLINK WN572HG3
📦 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 the device for botnet activities.
Likely Case
Remote code execution leading to device takeover, credential theft, DNS hijacking, or participation in DDoS attacks.
If Mitigated
Limited impact if devices are behind firewalls with strict inbound filtering and network segmentation.
🎯 Exploit Status
Exploit details are publicly available in Google Docs and vuldb.com. The vulnerability requires minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available - vendor did not respond to disclosure
Restart Required: No
Instructions:
No official patch available. Consider workarounds or replacement.
🔧 Temporary Workarounds
Disable WAN access to administration interface
linuxBlock external access to router web interface on WAN interface
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable DDNS functionality
allTurn off Dynamic DNS feature if not required
🧯 If You Can't Patch
- Isolate affected routers in separate VLAN with strict firewall rules
- Implement network monitoring for unusual outbound connections from routers
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface at System Status > Firmware Version. If date is 20221028 or earlier, device is vulnerable.Check Version:
curl -s http://router-ip/cgi-bin/internet.cgi | grep -i versionVerify Fix Applied:
No official fix available to verify. Workarounds can be tested by attempting to access administration interface from external networks.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /cgi-bin/internet.cgi with DDNS parameter containing shell metacharacters
- Unexpected process execution from web server context
Network Indicators:
- Outbound connections from router to unusual IPs/ports
- DNS queries to suspicious domains from router
SIEM Query:
source="router-logs" AND uri="/cgi-bin/internet.cgi" AND (param="DDNS" AND value MATCHES "[;|&`$()]+")