Advisory Details

February 15th, 2022

(Pwn2Own) Lexmark MC3224i Unprotected API Remote Code Execution Vulnerability

ZDI-22-331
ZDI-CAN-15800

CVE ID CVE-2021-44736
CVSS SCORE 9.6, (AV:A/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H)
AFFECTED VENDORS Lexmark
AFFECTED PRODUCTS MC3224i
VULNERABILITY DETAILS

This vulnerability allows remote attackers to remove authentication on affected installations of Lexmark MC3224i printers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within URL handling. The issue results from the lack of proper restriction to a URL. An attacker can leverage this vulnerability to execute code in the context of root.

ADDITIONAL DETAILS Lexmark has issued an update to correct this vulnerability. More details can be found at:
https://publications.lexmark.com/publications/security-alerts/CVE-2021-44736.pdf
DISCLOSURE TIMELINE
  • 2021-11-08 - Vulnerability reported to vendor
  • 2022-02-15 - Coordinated public release of advisory
CREDIT David BERARD (@_p0ly_), Vincent FARGUES (@Karion_), Thomas IMBERT (@masthoon), from @Synacktiv
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