CVE-2025-67158
📋 TL;DR
This authentication bypass vulnerability in Revotech I6032W-FHW devices allows attackers to access sensitive information and escalate privileges without valid credentials. Attackers can exploit the /cgi-bin/jvsweb.cgi endpoint via crafted HTTP requests. Organizations using affected Revotech I6032W-FHW devices are at risk.
💻 Affected Systems
- Revotech I6032W-FHW
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with administrative access, data exfiltration, and potential use as pivot point into internal networks
Likely Case
Unauthorized access to sensitive device information and configuration data, privilege escalation to administrative functions
If Mitigated
Limited impact if device is isolated, access controlled, and monitored for suspicious authentication attempts
🎯 Exploit Status
Public GitHub repository contains exploit details and likely proof-of-concept
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://revotech.com
Restart Required: No
Instructions:
Check vendor website for firmware updates. If available, download latest firmware and follow vendor's update procedure.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices from untrusted networks and restrict access to management interfaces
Access Control Lists
linuxImplement firewall rules to restrict access to /cgi-bin/jvsweb.cgi endpoint
iptables -A INPUT -p tcp --dport 80 -m string --string "/cgi-bin/jvsweb.cgi" --algo bm -j DROP
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Monitor network traffic for suspicious requests to /cgi-bin/jvsweb.cgi endpoint
🔍 How to Verify
Check if Vulnerable:
Send crafted HTTP request to http://device-ip/cgi-bin/jvsweb.cgi and check for unauthorized accessCheck Version:
Check device web interface or use vendor-specific CLI commands to verify firmware versionVerify Fix Applied:
Test the same exploit after applying vendor patch or workarounds to confirm access is blocked📡 Detection & Monitoring
Log Indicators:
- Unusual access to /cgi-bin/jvsweb.cgi endpoint
- Authentication bypass attempts
- Privilege escalation events
Network Indicators:
- HTTP requests to /cgi-bin/jvsweb.cgi with crafted parameters
- Unauthorized access patterns to device management interface
SIEM Query:
source="web_logs" AND uri="/cgi-bin/jvsweb.cgi" AND (status=200 OR status=302) AND NOT user_agent="normal_user_agent"