(Pwn2Own) QNAP TS-464 HLS_tmp Directory Traversal Arbitrary File Creation Vulnerability

May 19th, 2024
ZDI-24-476 ZDI-CAN-22407

CVE ID

CVE-2023-51365

CVSS Score

6.5 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected Vendors

QNAP

Affected Products

TS-464

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of QNAP TS-464 NAS devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of the HLS_tmp parameter provided to the share.cgi endpoint. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to create or modify files in the context of admin.

Additional Details

QNAP has issued an update to correct this vulnerability. More details can be found at:
https://www.qnap.com/en/security-advisory/qsa-24-14

Disclosure Timeline

  • 2023-11-09 - Vulnerability reported to vendor
  • 2024-05-19 - Coordinated public release of advisory
  • 2024-07-01 - Advisory Updated

Credit

Thalium team

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