CVE-2020-10669
📋 TL;DR
This vulnerability allows unauthenticated attackers to bypass authentication on the Canon Oce Colorwave 500 printer's web interface by accessing /home.jsp. Attackers can then access documents uploaded by legitimate users. Organizations using affected printer versions are at risk.
💻 Affected Systems
- Canon Oce Colorwave 500
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Sensitive documents containing confidential information, intellectual property, or personal data are exfiltrated by attackers, leading to data breaches, regulatory violations, and reputational damage.
Likely Case
Unauthorized access to printed documents, potentially exposing internal communications, financial data, or other sensitive information to attackers on the same network.
If Mitigated
With proper network segmentation and access controls, impact is limited to isolated printer network segments with no sensitive data exposure.
🎯 Exploit Status
Exploitation requires only accessing /home.jsp without authentication. Multiple public disclosures include technical details and demonstration.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version (specific version number not provided in CVE)
Vendor Advisory: Not provided in CVE references
Restart Required: Yes
Instructions:
1. Check current firmware version via printer web interface. 2. Download latest firmware from Canon support portal. 3. Upload and install firmware update via printer web interface. 4. Reboot printer after installation completes.
🔧 Temporary Workarounds
Network Segmentation
allIsolate printer to separate VLAN with restricted access
Access Control Lists
allImplement firewall rules to restrict access to printer web interface
🧯 If You Can't Patch
- Disable printer web interface if not required for operations
- Implement strict network access controls to limit which systems can reach the printer management interface
🔍 How to Verify
Check if Vulnerable:
Access printer IP address in browser, navigate to /home.jsp without authentication. If page loads with document access, device is vulnerable.Check Version:
Check firmware version in printer web interface under System Information or SettingsVerify Fix Applied:
After patching, attempt to access /home.jsp without authentication. Should redirect to login page or show access denied.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access to /home.jsp in web server logs
- Multiple failed authentication attempts followed by successful /home.jsp access
Network Indicators:
- HTTP GET requests to /home.jsp without preceding authentication requests
- Unusual document download patterns from printer IP
SIEM Query:
source_ip=printer_ip AND (url_path="/home.jsp" AND NOT (http_status=401 OR http_status=403))🔗 References
- http://packetstormsecurity.com/files/156833/Oce-Colorwave-500-CSRF-XSS-Authentication-Bypass.html
- http://seclists.org/fulldisclosure/2020/Mar/24
- https://www.redtimmy.com/red-teaming/hacking-the-oce-colorwave-printer-when-a-quick-security-assessment-determines-the-success-of-a-red-team-exercise/
- http://packetstormsecurity.com/files/156833/Oce-Colorwave-500-CSRF-XSS-Authentication-Bypass.html
- http://seclists.org/fulldisclosure/2020/Mar/24
- https://www.redtimmy.com/red-teaming/hacking-the-oce-colorwave-printer-when-a-quick-security-assessment-determines-the-success-of-a-red-team-exercise/
