Vulnerability identifier: #VU59601

Vulnerability risk: Critical

CVSSv3.1: 9.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-94

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QNAP QTS
Server applications / File servers (FTP/HTTP)
QuTS hero
Hardware solutions / Firmware

Vendor: QNAP Systems, Inc.

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, the vulnerability is being actively exploited in the wild by the DEADBOLT ransomware.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

QNAP QTS: 5.0.0 - 5.0.0.1870 20211201, 4.5.1.1456 20201015 - 4.5.4.1800 20210923

QuTS hero: h4.5.0.1279 build 20200421 - h5.0.0.1856 Build 20211117

---

External links
http://www.qnap.com/en/security-advisory/qsa-21-57
http://www.qnap.com/en/security-advisory/qsa-22-02

---

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.