#VU89040 Path traversal in QNAP Systems, Inc. products - CVE-2023-51365

Vulnerability identifier: #VU89040

Vulnerability risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-51365

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QNAP QTS
Server applications / File servers (FTP/HTTP)
QuTS hero
Hardware solutions / Firmware
QuTScloud
Operating systems & Components / Operating system

Vendor: QNAP Systems, Inc.

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences. A remote user can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QNAP QTS: before 4.5.4.2627, 5.1.4.2596, 4.5.4.2627, 4.5.4.2627

QuTS hero: before h4.5.4.2626 build 20231225

QuTScloud: before c5.1.5.2651

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External links
https://www.qnap.com/en/security-advisory/qsa-24-14
https://www.zerodayinitiative.com/advisories/ZDI-24-476/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.