Advisory Details

May 4th, 2023

(Pwn2Own) Canon imageCLASS MF743Cdw CADM resourceStart2 Buffer Overflow Remote Code Execution Vulnerability

ZDI-23-549
ZDI-CAN-19634

CVE ID CVE-2023-0851
CVSS SCORE 8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS Canon
AFFECTED PRODUCTS imageCLASS MF743Cdw
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Canon imageCLASS MF743Cdw printers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the CADM service, which listens on TCP port 9013 by default. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length buffer. An attacker can leverage this vulnerability to execute code in the context of the service account.

ADDITIONAL DETAILS Canon has issued an update to correct this vulnerability. More details can be found at:
https://www.usa.canon.com/support/canon-product-advisories/Service-Notice-Vulnerabilities-Remediation-Against-Buffer-Overflow
DISCLOSURE TIMELINE
  • 2022-12-28 - Vulnerability reported to vendor
  • 2023-05-04 - Coordinated public release of advisory
CREDIT namnp
BACK TO ADVISORIES