(Pwn2Own) HP LaserJet Pro MFP 3301fdw PostScript File Parsing Type Confusion Remote Code Execution Vulnerability

March 3rd, 2025
ZDI-25-106 ZDI-CAN-25533

CVE ID

CVE-2025-26508

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

LaserJet Pro MFP 3301fdw

Vulnerability Details

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of HP LaserJet Pro MFP 3301fdw printers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the parsing of PostScript data. The issue results from the lack of proper validation of user-supplied data, which can result in a type confusion condition. An attacker can leverage this vulnerability to execute 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_11953771-11953793-16/hpsbpi04007

Disclosure Timeline

  • 2024-12-02 - Vulnerability reported to vendor
  • 2025-03-03 - Coordinated public release of advisory
  • 2025-03-03 - Advisory Updated

Credit

Team Viettel

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