Advisory Details

August 24th, 2023

(Pwn2Own) HP Color LaserJet Pro M479fdw CFF Font Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability

CVE ID	CVE-2023-35177
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 execute arbitrary code on affected installations of HP Color LaserJet Pro M479fdw printers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of CFF fonts. 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 service account.
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_8651888-8651916-16/hpsbpi03853
DISCLOSURE TIMELINE	2022-12-28 - Vulnerability reported to vendor 2023-08-24 - Coordinated public release of advisory
CREDIT	Interrupt Labs

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