CVE-2021-34343 Buffer Overflow Vulnerability in QTS, QuTS hero, and QuTScloud
Attackers can execute arbitrary code via a stack buffer overflow in QNAP NAS operating systems, requiring immediate firmware updates.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-34343?
CVE-2021-34343 is a medium-severity memory corruption vulnerability in Qnap Qts, published on 10 Sep 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
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
Weakness: CWE-787
Which versions are affected by CVE-2021-34343?
It affects 3 products.
Products include Qnap Qts, Qnap Quts Hero, Qnap Qutscloud.
How do I fix CVE-2021-34343?
No fix has been published for CVE-2021-34343 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2021-34343 being exploited?
There is no known exploitation of CVE-2021-34343 in the wild and no public exploit code.
Other vulnerabilities in Qnap Qts
Sources
Also known as GHSA-h5w8-c4g8-8ch6.