CVE-2019-13197
📋 TL;DR
This CVE describes a buffer overflow vulnerability in Kyocera printer web interfaces that allows unauthenticated attackers to crash devices or potentially execute arbitrary code. Affected systems include specific Kyocera printer models like the ECOSYS M5526cdw with vulnerable firmware versions. Organizations using these printers are at risk of service disruption or compromise.
💻 Affected Systems
- Kyocera ECOSYS M5526cdw
- Other unspecified Kyocera printer models
📦 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 crashes and service disruption, requiring manual reboots and impacting business operations.
If Mitigated
Limited to denial of service if exploit attempts are detected and blocked by network controls, with minimal operational impact.
🎯 Exploit Status
Buffer overflow in URI paths suggests straightforward exploitation. Public technical advisory provides details that could be weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Kyocera security advisories for specific patched firmware versions
Vendor Advisory: https://www.kyoceradocumentsolutions.com/en/support/security/
Restart Required: Yes
Instructions:
1. Check current firmware version via printer web interface. 2. Visit Kyocera support site for security advisories. 3. Download and apply latest firmware update. 4. Reboot printer after update completion.
🔧 Temporary Workarounds
Network Segmentation
allIsolate printers on separate VLANs with strict firewall rules
Disable Web Interface
allDisable printer web management interface if not required
🧯 If You Can't Patch
- Implement strict network access controls to limit printer management interface access to authorized IPs only
- Monitor printer logs for unusual HTTP requests or crash events and implement alerting
🔍 How to Verify
Check if Vulnerable:
Check firmware version via printer web interface at http://[printer-ip]/ and compare against Kyocera security advisoriesCheck Version:
curl -s http://[printer-ip]/ | grep -i firmware or check via printer web interface settingsVerify Fix Applied:
Confirm firmware version has been updated to patched version and test web interface functionality📡 Detection & Monitoring
Log Indicators:
- Printer crash/reboot events
- Unusual long URI requests in web server logs
- Multiple failed connection attempts to printer web interface
Network Indicators:
- Unusual HTTP traffic to printer management ports (typically 80/443)
- Patterns of overly long URI requests
SIEM Query:
source="printer_logs" AND (event="crash" OR event="reboot") OR http.uri_length > 1000