Advisory Details

December 15th, 2022

Canon imageCLASS MF644Cdw BJNP Integer Overflow Remote Code Execution Vulnerability

ZDI-22-1666
ZDI-CAN-16032

CVE ID CVE-2022-43608
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 MF644Cdw
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Canon imageCLASS MF644Cdw printers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the BJNP service. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to execute code in the context of root.

ADDITIONAL DETAILS Canon has issued an update to correct this vulnerability. More details can be found at:
https://www.psirt.canon/advisory-information/cve-2022-43608_20221125
DISCLOSURE TIMELINE
  • 2022-07-14 - Vulnerability reported to vendor
  • 2022-12-15 - Coordinated public release of advisory
CREDIT Angelboy(@scwuaptx) from DEVCORE Research Team
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