CVE-2019-13196 – This CVE describes a buffer overflow vulnerabil... (How to Fix)

Q: What is the severity of CVE-2019-13196?

CVE-2019-13196 has a CVSS score of 8.8 (HIGH). This CVE describes a buffer overflow vulnerability in Kyocera printer web applications that allows authenticated attackers to crash devices or potentially execute arbitrary code. It affects specific Kyocera printer models like the ECOSYS M5526cdw. Attackers need authentication to exploit this vulnerability.

📋 TL;DR

This CVE describes a buffer overflow vulnerability in Kyocera printer web applications that allows authenticated attackers to crash devices or potentially execute arbitrary code. It affects specific Kyocera printer models like the ECOSYS M5526cdw. Attackers need authentication to exploit this vulnerability.

💻 Affected Systems

Products:

Kyocera ECOSYS M5526cdw

Versions: 2R7_2000.001.701 and likely other versions

Operating Systems: Printer firmware

Default Config Vulnerable: ⚠️ Yes

Notes: Specific firmware versions may vary; other Kyocera models with similar web interfaces may also be affected.

📦 What is this software?

Ecosys M5526cdw Firmware by Kyocera

View all CVEs affecting Ecosys M5526cdw Firmware →

⚠️ Risk & Real-World Impact

🔴

Worst Case

Authenticated attacker gains remote code execution on the printer, potentially compromising the device and using it as a foothold into the network.

🟠

Likely Case

Authenticated attacker causes denial of service by crashing the printer, disrupting printing services.

🟢

If Mitigated

With proper network segmentation and authentication controls, impact is limited to isolated printer disruption.

🌐 Internet-Facing: HIGH if printers are exposed to the internet with default credentials or weak authentication.

🏢 Internal Only: MEDIUM as attackers still need authentication, but insider threats or compromised credentials could exploit it.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires authentication to the printer's web interface. Buffer overflow exploitation requires specific technical knowledge.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Unknown specific version - check vendor for latest firmware

Vendor Advisory: https://www.kyoceradocumentsolutions.com/en/support/downloads.html

Restart Required: Yes

Instructions:

1. Visit Kyocera support website. 2. Download latest firmware for affected printer model. 3. Upload firmware via printer web interface. 4. Reboot printer after installation.

🔧 Temporary Workarounds

Disable web interface access

all

Disable the printer's web administration interface to prevent exploitation

Access printer settings > Network > Web Interface > Disable

Network segmentation

all

Isolate printers on separate VLAN with restricted access

🧯 If You Can't Patch

Implement strong authentication policies for printer access
Restrict network access to printers using firewall rules

🔍 How to Verify

Check if Vulnerable:

Check printer firmware version via web interface at http://[printer-ip]/wcd/system.xml

Check Version:

curl http://[printer-ip]/wcd/system.xml | grep -i version

Verify Fix Applied:

Verify firmware version is updated to latest available from vendor

📡 Detection & Monitoring

Log Indicators:

Multiple failed authentication attempts followed by web interface crash
Unusual HTTP POST requests to printer web interface

Network Indicators:

HTTP traffic to printer web interface with unusually long parameter values
Sudden loss of printer connectivity after web interface access

SIEM Query:

source="printer_logs" AND (event="web_interface_crash" OR (http_method="POST" AND uri="/web_app_endpoint" AND content_length>1000))

📊 Metadata

CVE ID: CVE-2019-13196

CVSS v3 Score: 8.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-120

Published: March 13, 2020

Last Updated: November 21, 2024

🔗 References

https://www.nccgroup.trust/us/our-research/technical-advisory-multiple-vulnerabilities-in-kyocera-printers/ Third Party Advisory
https://www.nccgroup.trust/us/our-research/technical-advisory-multiple-vulnerabilities-in-kyocera-printers/ Third Party Advisory

📤 Share & Export

📄 Export Markdown 📋 Export JSON

🔗 Related Vulnerabilities

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