CVE-2019-13204
📋 TL;DR
Multiple buffer overflow vulnerabilities in the IPP service of certain Kyocera printers allow unauthenticated attackers to cause Denial of Service (DoS) and potentially execute arbitrary code. Affected devices include Kyocera ECOSYS M5526cdw printers with specific firmware versions. This vulnerability affects organizations using these printers on their networks.
💻 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 other network systems, and persistent backdoor installation.
Likely Case
Denial of Service causing printer unavailability and potential device crash requiring physical restart.
If Mitigated
Limited to DoS impact if network segmentation prevents code execution or if exploit attempts are blocked.
🎯 Exploit Status
Buffer overflow vulnerabilities in network services typically have low exploitation complexity once details are known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Kyocera security advisories for specific patched firmware versions
Vendor Advisory: https://www.kyoceradocumentsolutions.com/en/support/security-information.html
Restart Required: Yes
Instructions:
1. Check current firmware version on printer web interface. 2. Download latest firmware from Kyocera support portal. 3. Upload firmware via printer web interface. 4. Apply update and restart printer.
🔧 Temporary Workarounds
Network Segmentation
allIsolate printers on separate VLAN with restricted access to prevent exploitation from untrusted networks.
Disable IPP Service
allTurn off Internet Printing Protocol service if not required for business operations.
🧯 If You Can't Patch
- Implement strict network access controls to limit printer access to authorized users only
- Monitor network traffic to/from printers for suspicious IPP protocol activity
🔍 How to Verify
Check if Vulnerable:
Check printer firmware version via web interface (typically http://printer-ip) and compare against Kyocera security advisories.Check Version:
Check via printer web interface or use SNMP query: snmpget -v2c -c public printer-ip .1.3.6.1.2.1.25.6.3.1.2.1Verify Fix Applied:
Verify firmware version has been updated to patched version and test IPP service functionality.📡 Detection & Monitoring
Log Indicators:
- Printer crash/restart logs
- IPP service error messages in printer logs
Network Indicators:
- Unusual IPP protocol traffic patterns
- Multiple malformed IPP requests to printer
SIEM Query:
source="printer-logs" AND ("IPP" OR "buffer overflow" OR "crash")