#VU6420 Improper access control in QNAP QTS

Vulnerability identifier: #VU6420

Vulnerability risk: Critical

CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: N/A

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QNAP QTS
Server applications / File servers (FTP/HTTP)

Vendor: QNAP Systems, Inc.

Description

The vulnerability allows a remote attacker to compromise vulnerable device.

The vulnerability exists due to unknown error, which leads to QNAP device compromise. Vulnerability details are not disclosed yet.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable device.

Note: the vulnerability is being actively exploited in the wild.

Mitigation
Update your Photo Station on your NAS to the version 5.4.1 (or the version 5.2.7 if your NAS does not support QTS 4.3.x) immediately.

Vulnerable software versions

QNAP QTS: 4.2.5 20170413, 4.3.3 - 4.3.3.0154 20170413

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External links
https://www.qnap.com/en/support/con_show.php?cid=116

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.