Buffer overflow in QNAP Qvr Elite
CVE-2021-38689
A stack buffer overflow vulnerability has been reported to affect QNAP device running QVR Elite, QVR Pro, QVR Guard. If exploited, this vulnerability allows attackers to execute arbitrary code. We have already fixed this vulnerability in the following versions of QVR Elite, QVR Pro, QVR Guard: QuTS hero h5.0.0: QVR Elite 2.1.4.0 (2021/12/06) and later QuTS hero h4.5.4: QVR Elite 2.1.4.0 (2021/12/06) and later QTS 5.0.0: QVR Elite 2.1.4.0 (2021/12/06) and later QTS 4.5.4: QVR Elite 2.1.4.0 (2021/12/06) and later QTS 4.5.4: QVR Pro 2.1.3.0 (2021/12/06) and later QTS 5.0.0: QVR Pro 2.1.3.0 (2021/12/06) and later QTS 4.5.4: QVR Guard 2.1.3.0 (2021/12/06) and later QTS 5.0.0: QVR Guard 2.1.3.0 (2021/12/06) and later
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.013 (69.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- QNAP Qvr Elite
- QNAP Qvr Guard
- QNAP Qvr Pro
- QNAP Systems Inc. Qvr Elite — versions unspecified
- QNAP Systems Inc. Qvr Guard — versions unspecified
- QNAP Systems Inc. Qvr Pro — versions unspecified
Weakness classification (CWE)
References
- www.qnap.com/en/security-advisory/qsa-21-59 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-38689?
- CVE-2021-38689 is a high-severity vulnerability in QNAP Qvr Elite, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 8.1/10. Published 2022-01-14.
- How severe is CVE-2021-38689?
- High severity. CVSS v3 base score is 8.1 out of 10.