(Pwn2Own) Lexmark CX331adwe PDF File Parsing Memory Corruption Remote Code Execution Vulnerability

January 31st, 2024
ZDI-24-082 ZDI-CAN-22443

CVE ID

CVE-2023-50735

CVSS Score

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

Affected Vendors

Lexmark

Affected Products

CX331adwe

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Lexmark CX331adwe printers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the parsing of PDF files. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the pagemaker user.

Additional Details

Lexmark has issued an update to correct this vulnerability. More details can be found at:
https://www.lexmark.com/en_us/solutions/security/lexmark-security-advisories.html

Disclosure Timeline

  • 2023-11-09 - Vulnerability reported to vendor
  • 2024-01-31 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated

Credit

Team PHPHooligans

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