CVE-2019-13201
📋 TL;DR
A buffer overflow vulnerability in the LPD service of certain Kyocera printers allows unauthenticated attackers to cause denial of service or potentially execute arbitrary code. This affects Kyocera printers like the ECOSYS M5526cdw with vulnerable firmware versions. Organizations using these printers are at risk.
💻 Affected Systems
- Kyocera ECOSYS M5526cdw
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete device compromise, lateral movement to connected networks, and persistent backdoor installation.
Likely Case
Denial of service causing printer downtime and disruption of printing services.
If Mitigated
Limited to service disruption if network segmentation and access controls prevent exploitation.
🎯 Exploit Status
Buffer overflow in LPD service makes exploitation relatively straightforward for attackers with network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Kyocera for latest firmware updates
Vendor Advisory: https://www.kyoceradocumentsolutions.com
Restart Required: Yes
Instructions:
1. Check Kyocera support site for firmware updates
2. Download appropriate firmware for your printer model
3. Apply firmware update following vendor instructions
4. Restart printer after update
🔧 Temporary Workarounds
Disable LPD Service
allDisable the vulnerable LPD printing service if not required
Access printer web interface > Network Settings > TCP/IP > Disable LPD
Network Segmentation
allIsolate printers on separate VLAN with restricted access
🧯 If You Can't Patch
- Disable LPD service and use alternative printing protocols
- Implement strict network access controls to limit printer access to trusted hosts only
🔍 How to Verify
Check if Vulnerable:
Check printer firmware version via web interface or control panel. If version matches affected range and LPD is enabled, device is vulnerable.Check Version:
Access printer web interface at http://[printer-ip] and check System/Configuration pageVerify Fix Applied:
Confirm firmware has been updated to latest version and LPD service is either disabled or patched.📡 Detection & Monitoring
Log Indicators:
- Unusual LPD service crashes
- Multiple connection attempts to port 515
- Printer service restart logs
Network Indicators:
- Unusual traffic to printer port 515 (LPD)
- Large or malformed LPD packets
SIEM Query:
destination_port:515 AND (packet_size > threshold OR protocol_anomaly)