CVE-2022-48164
📋 TL;DR
This vulnerability allows unauthenticated attackers to access the ExportLogs.sh script on Wavlink WL-WN533A8 routers, enabling them to download configuration files and log data containing admin credentials. It affects Wavlink WL-WN533A8 routers running vulnerable firmware versions. Attackers can exploit this without any authentication.
💻 Affected Systems
- Wavlink WL-WN533A8
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to the router, allowing them to reconfigure network settings, intercept traffic, install malware, or use the device as a pivot point into internal networks.
Likely Case
Attackers steal admin credentials and configuration data, potentially gaining full control over the router and compromising network security.
If Mitigated
With proper network segmentation and access controls, the impact is limited to the router itself, though credentials could still be compromised.
🎯 Exploit Status
Exploitation requires only HTTP requests to the vulnerable endpoint with no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None found
Restart Required: No
Instructions:
No official patch available. Check Wavlink website for firmware updates.
🔧 Temporary Workarounds
Block access to ExportLogs.sh
linuxUse firewall rules or web server configuration to block access to /cgi-bin/ExportLogs.sh
iptables -A INPUT -p tcp --dport 80 -m string --string "/cgi-bin/ExportLogs.sh" --algo bm -j DROP
iptables -A INPUT -p tcp --dport 443 -m string --string "/cgi-bin/ExportLogs.sh" --algo bm -j DROP
Disable CGI script execution
linuxRemove execute permissions from ExportLogs.sh or disable CGI functionality
chmod -x /www/cgi-bin/ExportLogs.sh
🧯 If You Can't Patch
- Isolate affected routers in separate network segments with strict firewall rules
- Change admin credentials regularly and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Attempt to access http://[router-ip]/cgi-bin/ExportLogs.sh without authentication. If it returns configuration/log data, the device is vulnerable.Check Version:
Check router web interface or use command: cat /proc/version (if shell access available)Verify Fix Applied:
After applying workarounds, verify the ExportLogs.sh endpoint returns access denied or connection refused.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to /cgi-bin/ExportLogs.sh from unauthorized IPs
- Multiple failed login attempts followed by ExportLogs.sh access
Network Indicators:
- Unusual outbound connections from router after ExportLogs.sh access
- HTTP GET requests to ExportLogs.sh from external IPs
SIEM Query:
source="router_logs" AND (uri_path="/cgi-bin/ExportLogs.sh" OR user_agent="*curl*" OR user_agent="*wget*")🔗 References
- https://docs.google.com/document/d/1JgqpBYRxyU0WKDSqkvi4Yo0723k7mrIUeuH9i1eEs8U/edit?usp=sharing
- https://github.com/strik3r0x1/Vulns/blob/main/WAVLINK_WN533A8.md
- https://docs.google.com/document/d/1JgqpBYRxyU0WKDSqkvi4Yo0723k7mrIUeuH9i1eEs8U/edit?usp=sharing
- https://github.com/strik3r0x1/Vulns/blob/main/WAVLINK_WN533A8.md
