CVE-2021-34343 vulnerability in QNAP Products
Published on September 10, 2021
Buffer Overflow Vulnerability in QTS, QuTS hero, and QuTScloud
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
Vulnerability Analysis
CVE-2021-34343 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2021-34343 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2021-34343
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Affected Versions
QNAP Systems Inc. QTS:- Version unspecified and below 4.5.4.1715 build 20210630 is affected.
- Version unspecified and below 5.0.0.1716 build 20210701 is affected.
- Version unspecified and below c4.5.6.1755 is affected.
- Version unspecified and below h4.5.4.1771 build 20210825 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.