PT-2023-20462 · Lexmark · Lexmark

Published 2023-04-10 · Updated 2025-02-11 · CVE-2023-26067

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Lexmark devices through 2023-02-19

Description The issue is related to mishandling Input Validation. A proof of concept (PoC) has been published for a critical vulnerability in Lexmark printers, which allows for privilege escalation. There have been reports of this vulnerability being exploited, with some users successfully dumping admin hashes but unable to get a reverse shell. Others have mentioned exploiting the vulnerability using recent CVEs for remote code execution (RCE).

Recommendations As a temporary workaround, consider disabling the vulnerable Input Validation function until a patch is available. Restrict access to the vulnerable Lexmark devices to minimize the risk of exploitation. Avoid using the vulnerable devices until the issue is resolved. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2023-26067

ZDI-23-667

ZDI-23-668

ZDI-23-670

Affected Products

Lexmark

References · 30

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/linux/http/lexmark_faxtrace_settings.rb · Exploit
• 🔥 https://github.com/horizon3ai/CVE-2023-26067 · Exploit
• https://zerodayinitiative.com/advisories/ZDI-23-670 · Security Note
• https://support.lexmark.com/alerts · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-26067 · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-23-668 · Security Note
• https://publications.lexmark.com/publications/security-alerts/CVE-2023-26067.pdf · Vendor Advisory
• https://zerodayinitiative.com/advisories/ZDI-23-667 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-26067 · Security Note
• https://twitter.com/NahamSec/status/1841692404178682065 · Twitter Post
• https://twitter.com/CVEShield/status/1690632164172316672 · Twitter Post
• https://twitter.com/romer_u/status/1690367173724901376 · Twitter Post
• https://twitter.com/SeguInfo/status/1690407814559367168 · Twitter Post
• http://packetstormsecurity.com/files/174763/Lexmark-Device-Embedded-Web-Server-Remote-Code-Execution.html · Note
• https://twitter.com/rkx73/status/1690959731920171008 · Twitter Post