Advisory Details

February 6th, 2024

(Pwn2Own) Canon imageCLASS MF753Cdw rls-login Authorization Stack-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-24-092
ZDI-CAN-22386

CVE ID CVE-2023-6232
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 MF753Cdw
VULNERABILITY DETAILS

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Canon imageCLASS MF753Cdw printers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the parsing of the Authorization header provided to the /mls/rls-login/basic endpoint. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device.

ADDITIONAL DETAILS Canon has issued an update to correct this vulnerability. More details can be found at:
https://www.canon-europe.com/support/product-security-latest-news/
DISCLOSURE TIMELINE
  • 2023-11-09 - Vulnerability reported to vendor
  • 2024-02-06 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated
CREDIT @quangnh89
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