What is CVE-2021-34343?

CVE-2021-34343 is a stack buffer overflow vulnerability that affects QNAP devices running QTS, QuTScloud, and QuTS hero.

How does CVE-2021-34343 impact QNAP devices?

If exploited, CVE-2021-34343 allows attackers to execute arbitrary code on the affected QNAP devices.

Which versions of QTS are affected by CVE-2021-34343?

Versions up to and including QTS 4.3.3.1693 are affected by CVE-2021-34343.

How can I fix CVE-2021-34343 vulnerability?

To fix the CVE-2021-34343 vulnerability, update QTS, QuTScloud, or QuTS hero to the following versions: QTS 4.5.4.1715 or later, QuTS hero h4.5.4.1771 or later, or QuTScloud c4.5.6.1755 or later.

Where can I find more information about CVE-2021-34343?

You can find more information about CVE-2021-34343 and the necessary patches on the official QNAP security advisory page: https://www.qnap.com/en/security-advisory/qsa-21-33

Vulnerability/
CVE-2021-34343

high

7.2

CWE

787 119

10/9/2021

10/2/2022

CVE-2021-34343: Buffer Overflow

First published: Fri Sep 10 2021(Updated: )

A stack buffer overflow vulnerability has been reported to affect QNAP device running QTS, QuTScloud, QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QTS, QuTScloud, QuTS hero: QTS 4.5.4.1715 build 20210630 and later QTS 5.0.0.1716 build 20210701 and later QuTScloud c4.5.6.1755 and later QuTS hero h4.5.4.1771 build 20210825 and later

Credit: security@qnapsecurity.com.tw

Affected Software	Affected Version	How to fix
QNAP QTS	<4.3.3.1693
QNAP QTS	>=4.3.4<4.3.6.1750
QNAP QTS	>=4.4.0<4.5.4.1715
QNAP QTS	>=5.0.0<5.0.0.1716
QNAP QuTS hero	<h4.5.4.1771
QNAP QuTScloud	<c4.5.6.1755

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Reference Links

https://www.qnap.com/en/security-advisory/qsa-21-33

Frequently Asked Questions

What is CVE-2021-34343?
CVE-2021-34343 is a stack buffer overflow vulnerability that affects QNAP devices running QTS, QuTScloud, and QuTS hero.
How does CVE-2021-34343 impact QNAP devices?
If exploited, CVE-2021-34343 allows attackers to execute arbitrary code on the affected QNAP devices.
Which versions of QTS are affected by CVE-2021-34343?
Versions up to and including QTS 4.3.3.1693 are affected by CVE-2021-34343.
How can I fix CVE-2021-34343 vulnerability?
To fix the CVE-2021-34343 vulnerability, update QTS, QuTScloud, or QuTS hero to the following versions: QTS 4.5.4.1715 or later, QuTS hero h4.5.4.1771 or later, or QuTScloud c4.5.6.1755 or later.
Where can I find more information about CVE-2021-34343?
You can find more information about CVE-2021-34343 and the necessary patches on the official QNAP security advisory page: https://www.qnap.com/en/security-advisory/qsa-21-33

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canonical/qnap qutscloud

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