Vulnerability identifier: #VU59597

Vulnerability risk: High

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-38689

CWE-ID: CWE-121

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QVR Elite
Client/Desktop applications / Other client software
QVR Pro
Client/Desktop applications / Other client software
QVR Guard
Client/Desktop applications / Other client software

Vendor:

Description

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

The vulnerability exists due to a boundary error. A remote attacker can trigger stack-based buffer overflow and execute arbitrary code 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 Elite: before 2.1.4.0

QVR Pro: before 2.1.3.0

QVR Guard: before 2.1.3.0

CPE

• cpe:2.3::qnap_systems:qvr_elite:*:*:*:*:*:*:*:*
• cpe:2.3::qnap_systems:qvr_pro:*:*:*:*:*:*:*:*
• cpe:2.3::qnap_systems:qvr_guard:*:*:*:*:*:*:*:*

External links
http://www.qnap.com/en/security-advisory/qsa-21-59

---

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.