Buffer overflow in QNAP Nas
CVE-2021-28797
A stack-based buffer overflow vulnerability has been reported to affect QNAP NAS devices running Surveillance Station. If exploited, this vulnerability allows attackers to execute arbitrary code. QNAP have already fixed this vulnerability in the following versions: Surveillance Station 5.1.5.4.3 (and later) for ARM CPU NAS (64bit OS) and x86 CPU NAS (64bit OS) Surveillance Station 5.1.5.3.3 (and later) for ARM CPU NAS (32bit OS) and x86 CPU NAS (32bit OS)
Vulnerability class: Buffer Overflow
EPSS: 0.059 (92.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Qnap Nas
- Qnap Surveillance_station
- Qnap Systems Inc. Surveillance Station — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@qnapsecurity.com.tw (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-28797?
- CVE-2021-28797 is a critical-severity vulnerability in QNAP Nas, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2021-04-14.
- How severe is CVE-2021-28797?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-28797 known to be exploited?
- 4 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.