CVE-2020-6091
📋 TL;DR
CVE-2020-6091 is an authentication bypass vulnerability in Epson EB-1470Ui projector web control functionality. Attackers can send specially crafted HTTP requests to bypass authentication and access sensitive information. Organizations using affected Epson projectors with web control enabled are vulnerable.
💻 Affected Systems
- Epson EB-1470Ui projector
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of projector settings, unauthorized access to connected networks, and potential pivot point for further attacks on internal systems.
Likely Case
Unauthorized access to projector configuration, exposure of network settings, and potential disruption of projector functionality.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external access to projector web interface.
🎯 Exploit Status
Exploitation requires sending crafted HTTP requests to the web interface. No authentication needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware update available from Epson support
Vendor Advisory: https://epson.com/support/wa00907
Restart Required: Yes
Instructions:
1. Download firmware update from Epson support site. 2. Transfer to projector via USB or network. 3. Apply update through projector menu. 4. Restart projector.
🔧 Temporary Workarounds
Disable web control interface
allTurn off web control functionality to prevent HTTP access
Access projector menu > Network > Web Control > Disable
Network segmentation
allIsolate projector on separate VLAN with restricted access
🧯 If You Can't Patch
- Disable web control interface completely
- Implement strict firewall rules to block all external access to projector IP
🔍 How to Verify
Check if Vulnerable:
Check firmware version in projector menu: Settings > Information > Version. Look for MAIN: 98009273ESWWV107 and MAIN2: 8X7325WWV303.Check Version:
No CLI command - check through projector menu interfaceVerify Fix Applied:
After update, verify firmware version no longer matches vulnerable versions. Test web interface authentication requirements.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts followed by successful access
- Unusual HTTP requests to projector web interface
Network Indicators:
- HTTP requests to projector IP on port 80/443 without authentication
- Unusual traffic patterns to projector management interface
SIEM Query:
source_ip="projector_ip" AND (http_method="POST" OR http_method="GET") AND NOT user_agent="browser_agent"