PT-2021-20914 · Lexmark · G2 Driver+3

Published 2021-07-19 · Updated 2021-09-20 · CVE-2021-35449

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Lexmark Universal Print Driver versions 2.15.1.0 and below G2 driver versions 2.7.1.0 and below G3 driver versions 3.2.0.0 and below G4 driver versions 4.2.1.0 and below

Description: A privilege escalation issue allows a standard low-privileged user to execute a DLL of their choosing during the add printer process, resulting in escalation of privileges to SYSTEM.

Recommendations: For Lexmark Universal Print Driver versions 2.15.1.0 and below, update to a version above 2.15.1.0 to resolve the issue. For G2 driver versions 2.7.1.0 and below, update to a version above 2.7.1.0 to resolve the issue. For G3 driver versions 3.2.0.0 and below, update to a version above 3.2.0.0 to resolve the issue. For G4 driver versions 4.2.1.0 and below, update to a version above 4.2.1.0 to resolve the issue. As a temporary workaround, consider restricting the add printer process to minimize the risk of exploitation.

Exploit

Fix

Incorrect Permission

Weakness Enumeration

CWE-732

Related Identifiers

CVE-2021-35449

Affected Products

G2 Driver

G3 Driver

G4 Driver

Lexmark Universal Print Driver

References · 8

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/local/lexmark_driver_privesc.rb · Exploit
• 🔥 http://packetstormsecurity.com/files/163811/Lexmark-Driver-Privilege-Escalation.html · Exploit
• http://support.lexmark.com/alerts · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-35449 · Security Note
• https://osv.dev/vulnerability/CVE-2021-35449 · Vendor Advisory
• https://t.me/cvenotify/17839 · Telegram Post
• https://raw.githubusercontent.com/jacob-baines/vuln_disclosure/main/vuln_2021_02.txt · Note
• https://t.me/cvenotify/17837 · Telegram Post