Canon imageCLASS MF644Cdw BJNP Integer Overflow Remote Code Execution Vulnerability

December 15th, 2022
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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