High severity · published Sep 10, 2021
CVE-2021-34343
A stack buffer overflow vulnerability has been reported to affect QNAP device running QTS, QuTScloud, QuTS hero
7.2
CVSS
2%
EPSS
No
On KEV
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)2.0% · higher than 80% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QT
Qts · Qnap
before 4.3.3.1693; 4.3.4 before 4.3.6.1750; 4.4.0 before 4.5.4.1715; 5.0.0 before 5.0.0.1716 · source: NVD
QH
Quts Hero · Qnap
before h4.5.4.1771 · source: NVD
QU
Qutscloud · Qnap
before c4.5.6.1755 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34343
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34343
Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-21-33
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