Advisory Details

August 24th, 2023

(Pwn2Own) HP LaserJet Pro M479fdw bksettings Hardcoded Cryptographic Key Authentication Bypass Vulnerability

CVE ID	CVE-2023-35176
CVSS SCORE	8.8, AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS	HP
AFFECTED PRODUCTS	Color LaserJet Pro M479fdw
VULNERABILITY DETAILS	This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of HP LaserJet Pro M479fdw printers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the Backup and Restore functionality. The issue results from a hardcoded crytographic key. An attacker can leverage this vulnerability to bypass authentication and execute arbitrary code in the context of the device.
ADDITIONAL DETAILS	HP has issued an update to correct this vulnerability. More details can be found at: https://support.hp.com/us-en/document/ish_8651671-8651697-16/hpsbpi03852
DISCLOSURE TIMELINE	2022-12-28 - Vulnerability reported to vendor 2023-08-24 - Coordinated public release of advisory
CREDIT	Nguyen Cong Thanh - @ExLuck99 and Ha Anh Hoang - @hoangha2

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