Advisory Details

January 31st, 2025

(Pwn2Own) Canon imageCLASS MF656Cdw TTF Parsing Write-What-Where Condition Remote Code Execution Vulnerability

CVE ID	CVE-2024-12649
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 MF656Cdw
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Canon imageCLASS MF656Cdw printers. Authentication is not required to exploit this vulnerability. The specific flaw exists within parsing of TrueType fonts. The issue results from the lack of proper validation of user-supplied data, which can result in a write-what-where condition. 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.canon-europe.com/support/product-security/#news
DISCLOSURE TIMELINE	2024-12-16 - Vulnerability reported to vendor 2025-01-31 - Coordinated public release of advisory 2025-01-31 - Advisory Updated
CREDIT	PHP Hooligans / Midnight Blue

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