Multiple vulnerabilities in QNAP QVR

Published: 2021-11-29

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-38685 CVE-2021-38686
CWE-ID	CWE-77 CWE-287
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	QVR Client/Desktop applications / Other client software
Vendor

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Command Injection

EUVDB-ID: #VU58395

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38685

CWE-ID: CWE-77 - Command injection

Exploit availability: No

Description

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

The vulnerability exists due to improper input validation. A remote attacker can pass specially crafted data to the application and execute arbitrary commands on the target system.

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

Mitigation

Install updates from vendor's website.

Vulnerable software versions

QVR: before 5.1.6 20211109

External links

http://www.qnap.com/en/security-advisory/qsa-21-51

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?

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

2) Improper Authentication

EUVDB-ID: #VU58396

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38686

CWE-ID: CWE-287 - Improper Authentication