CVE-2017-8864
📋 TL;DR
CVE-2017-8864 is a client-side security bypass vulnerability in Cohu 3960HD cameras where JavaScript-based security checks can be manipulated by attackers. This allows bypassing authentication and potentially executing arbitrary code on the camera system. Organizations using Cohu 3960HD cameras are affected.
💻 Affected Systems
- Cohu 3960HD IP Camera
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete camera compromise, unauthorized access to video feeds, and potential pivot to internal networks.
Likely Case
Authentication bypass allowing unauthorized access to camera controls and video streams, with potential for camera malfunction or denial of service.
If Mitigated
Limited impact if cameras are isolated on separate network segments with strict access controls and monitoring.
🎯 Exploit Status
Exploitation involves manipulating JavaScript validation in the web interface, which requires minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Contact Cohu for specific patched firmware version
Vendor Advisory: https://www.cohu.com/security-advisories
Restart Required: Yes
Instructions:
1. Contact Cohu support for latest firmware
2. Download firmware update
3. Upload firmware via camera web interface
4. Reboot camera after update
🔧 Temporary Workarounds
Network Segmentation
allIsolate cameras on separate VLAN with strict firewall rules
Access Control Lists
allImplement IP-based restrictions to camera web interface
🧯 If You Can't Patch
- Disable camera web interface if not required for operations
- Implement network monitoring for unusual camera access patterns
🔍 How to Verify
Check if Vulnerable:
Test if client-side JavaScript validation can be bypassed in the camera web interface password/security functionsCheck Version:
Check firmware version in camera web interface under System > InformationVerify Fix Applied:
Verify firmware version matches patched release from Cohu and test that client-side validation cannot be bypassed📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful access
- Unusual access patterns to camera web interface
Network Indicators:
- HTTP requests manipulating JavaScript validation parameters
- Unusual traffic to camera web interface from unauthorized IPs
SIEM Query:
source_ip=* AND dest_ip=camera_ip AND (http_method=POST OR http_method=GET) AND (uri_contains="password" OR uri_contains="auth") AND status_code=200