OS Command Injection in QNAP QVR Firmware

1) OS Command Injection

EUVDB-ID: #VU84036

Risk: High

CVSSv3.1: 8.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2023-47565

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation within QNAP VioStor NVR models running QVR firmware. A remote user can pass specially crafted data to the application and execute arbitrary OS commands 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 Mirai-based botnet named InfectedSlurs.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

QVR: before 5.0.0

External links

http://www.qnap.com/en/security-advisory/qsa-23-48
http://www.akamai.com/blog/security-research/qnap-viostor-zero-day-vulnerability-spreading-mirai-patched

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?

Yes. This vulnerability is being exploited in the wild.