CVE-2024-11344
📋 TL;DR
A type confusion vulnerability in the Postscript interpreter of Lexmark devices allows attackers to execute arbitrary code by sending specially crafted Postscript files. This affects various Lexmark printer and multifunction devices running vulnerable firmware versions. Attackers could potentially gain full control of affected devices.
💻 Affected Systems
- Various Lexmark printers and multifunction devices
⚠️ 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 leading to complete device compromise, lateral movement to internal networks, data exfiltration, and persistent backdoor installation.
Likely Case
Device compromise allowing attackers to intercept print jobs, modify device settings, or use the device as a foothold for internal network reconnaissance.
If Mitigated
Limited impact if devices are isolated from untrusted networks and have strict access controls, though local network attacks remain possible.
🎯 Exploit Status
Exploitation requires sending malicious Postscript files to the device. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware versions specified in Lexmark security advisory
Vendor Advisory: https://www.lexmark.com/en_us/solutions/security/lexmark-security-advisories.html
Restart Required: Yes
Instructions:
1. Visit Lexmark security advisory page. 2. Identify affected device models. 3. Download and apply the latest firmware update for your specific device model. 4. Reboot the device after firmware installation.
🔧 Temporary Workarounds
Disable Postscript interpreter
allDisable Postscript processing on affected devices if not required for business operations
Network segmentation
allIsolate Lexmark devices on separate VLANs with strict firewall rules
🧯 If You Can't Patch
- Implement strict network access controls to limit device exposure
- Monitor device logs for suspicious Postscript processing activity
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against vulnerable versions listed in Lexmark advisoryCheck Version:
Check device web interface or printed configuration page for firmware versionVerify Fix Applied:
Verify firmware version has been updated to patched version specified in advisory📡 Detection & Monitoring
Log Indicators:
- Unusual Postscript processing errors
- Multiple failed Postscript job attempts
- Unexpected device reboots
Network Indicators:
- Unusual network traffic from printer devices
- Postscript files sent from untrusted sources
SIEM Query:
source="lexmark-printer" AND (event="postscript_error" OR event="firmware_crash")