Multiple vulnerabilities in QNAP NVR Storage Expansion

Published: 2021-09-10

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2021-34345 CVE-2021-34346
CWE-ID	CWE-121
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	NVR Storage Expansion Server applications / Other server solutions
Vendor	QNAP Systems, Inc.

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Stack-based buffer overflow

EUVDB-ID: #VU56444

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-2021-34345

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

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 unauthenticated 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

NVR Storage Expansion: 1.0.5

External links

http://www.qnap.com/en/security-advisory/qsa-21-36

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) Stack-based buffer overflow

EUVDB-ID: #VU56445