CVE-2020-10095
📋 TL;DR
This Cross-Site Request Forgery (CSRF) vulnerability in Lexmark devices allows attackers to trick authenticated users into submitting malicious requests that modify device configurations. It affects various Lexmark printer and multifunction devices when accessed through web interfaces. Organizations using vulnerable Lexmark devices are at risk.
💻 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
Complete device takeover allowing attackers to reconfigure network settings, install malicious firmware, disable security features, or use the device as an internal network pivot point.
Likely Case
Unauthorized configuration changes leading to service disruption, data leakage through modified scan/print settings, or network misconfiguration.
If Mitigated
Limited impact with proper network segmentation and CSRF protections in place, potentially only affecting device functionality without network compromise.
🎯 Exploit Status
Requires user interaction (victim must be logged into device web interface) and attacker ability to craft malicious web pages.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check specific device firmware updates in Lexmark advisories
Vendor Advisory: https://www.lexmark.com/en_us/solutions/security/lexmark-security-advisories.html
Restart Required: No
Instructions:
1. Identify affected Lexmark devices. 2. Visit Lexmark security advisories page. 3. Download and apply firmware updates for specific models. 4. Verify update completion through device web interface.
🔧 Temporary Workarounds
Implement CSRF Protection
allAdd CSRF tokens to web interface requests or use same-origin policy enforcement
Network Segmentation
allIsolate printer devices on separate VLANs with restricted access
🧯 If You Can't Patch
- Disable web management interfaces if not required
- Implement strict access controls and network segmentation for printer devices
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against Lexmark security advisories for affected versionsCheck Version:
Access device web interface > Settings > About/Device Information to view firmware versionVerify Fix Applied:
Verify firmware version has been updated to patched version listed in Lexmark advisory📡 Detection & Monitoring
Log Indicators:
- Unusual configuration changes in device logs
- Multiple failed login attempts followed by configuration changes
Network Indicators:
- Unexpected configuration requests to printer web interfaces
- Traffic patterns suggesting CSRF attack vectors
SIEM Query:
source="printer_logs" AND (event="configuration_change" OR event="admin_action") AND user_agent CONTAINS suspicious_pattern