CVE-2020-10671
📋 TL;DR
CVE-2020-10671 is a Cross-Site Request Forgery (CSRF) vulnerability in the Canon Oce Colorwave 500 printer's web interface. It allows attackers to trick authenticated administrators into performing unauthorized administrative actions without their knowledge. This affects all systems running the vulnerable firmware version.
💻 Affected Systems
- Canon Oce Colorwave 500
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of printer administration: attackers could reconfigure settings, install malicious firmware, disable security features, or use the printer as an internal network pivot point.
Likely Case
Unauthorized configuration changes, data exfiltration through printer logs, or disruption of printing services.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external attackers from reaching the printer interface.
🎯 Exploit Status
Exploitation requires an authenticated administrator session. Attackers can use standard CSRF techniques with simple HTML forms or JavaScript.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version (specific version not specified 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 firmware via printer web interface. 4. Reboot printer after installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate printer management interface to dedicated VLAN or restrict access to authorized administrative IPs only.
Browser Security Extensions
allDeploy CSRF protection browser extensions for administrators who access printer interface.
🧯 If You Can't Patch
- Implement strict network access controls to limit who can reach the printer's web interface
- Require administrators to use separate browser profiles or incognito mode when managing printers and close sessions immediately after use
🔍 How to Verify
Check if Vulnerable:
Access printer web interface at http://[printer-ip], navigate to System Information page and check if firmware version is 4.0.0.0.Check Version:
curl -s http://[printer-ip]/system/info | grep -i versionVerify Fix Applied:
After updating, verify firmware version is no longer 4.0.0.0 and test CSRF protections by attempting to submit administrative forms without proper tokens.📡 Detection & Monitoring
Log Indicators:
- Multiple administrative configuration changes from same IP in short timeframe
- Unusual firmware update attempts
- Configuration changes without corresponding user authentication logs
Network Indicators:
- HTTP POST requests to administrative endpoints without Referer headers or CSRF tokens
- Unusual traffic patterns to printer web interface from non-admin networks
SIEM Query:
source="printer.log" AND (event_type="config_change" OR event_type="firmware_update") AND user="admin" AND src_ip NOT IN [admin_network]🔗 References
- http://packetstormsecurity.com/files/156833/Oce-Colorwave-500-CSRF-XSS-Authentication-Bypass.html
- 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
- https://www.redtimmy.com/red-teaming/hacking-the-oce-colorwave-printer-when-a-quick-security-assessment-determines-the-success-of-a-red-team-exercise/
