CVE-2025-0235
📋 TL;DR
This vulnerability allows attackers to execute arbitrary code or cause denial of service by exploiting an out-of-bounds write during image rendering in Canon printer drivers. It affects systems using Generic PCL6 V4, Generic UFR II V4, or Generic LIPSLX V4 printer drivers. Attackers could potentially gain elevated privileges if they can trigger the vulnerability.
💻 Affected Systems
- Generic PCL6 V4 Printer Driver
- Generic UFR II V4 Printer Driver
- Generic LIPSLX V4 Printer Driver
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with SYSTEM/root privileges leading to complete system compromise, lateral movement, and data exfiltration.
Likely Case
Local privilege escalation or denial of service affecting printing functionality and potentially crashing the print spooler service.
If Mitigated
Limited impact with proper network segmentation and restricted printer driver installation rights.
🎯 Exploit Status
Requires ability to send malicious print jobs or interact with print spooler. No public exploits available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Canon advisory for specific patched versions
Vendor Advisory: https://psirt.canon/advisory-information/cp2025-002/
Restart Required: Yes
Instructions:
1. Visit Canon's security advisory page
2. Download updated printer driver versions
3. Uninstall affected drivers
4. Install patched versions
5. Restart affected systems
🔧 Temporary Workarounds
Restrict Printer Driver Installation
windowsLimit who can install printer drivers to prevent vulnerable driver deployment
Group Policy: Computer Configuration > Policies > Administrative Templates > Printers > 'Allow non-administrators to install drivers for network printers' = Disabled
Network Segmentation
allIsolate print servers and restrict access to print spooler services
Firewall rules: Block TCP port 9100, 515, 631 from untrusted networks
🧯 If You Can't Patch
- Remove affected printer drivers and use alternative drivers
- Implement strict access controls to print servers and disable unnecessary printing services
🔍 How to Verify
Check if Vulnerable:
Check installed printer drivers for affected Canon driver versions via Print Management console or driver management toolsCheck Version:
Windows: Get-PrinterDriver | Select Name, DriverVersion; Linux: lpinfo -v and check driver versionsVerify Fix Applied:
Verify driver version matches patched version from Canon advisory and test printing functionality📡 Detection & Monitoring
Log Indicators:
- Print spooler crashes (Event ID 7031, 7034)
- Unexpected print job submissions
- Driver loading failures in system logs
Network Indicators:
- Unusual print job traffic to port 9100/515/631
- Multiple failed print jobs from single source
SIEM Query:
EventID=7031 OR EventID=7034 AND Source="Service Control Manager" AND ServiceName="Spooler"