Authenticated arbitrary code execution via stack overflow
Published Sep 10, 2021 · Updated Sep 16, 2024
A stack buffer overflow in QNAP QTS, QuTS hero, and QuTScloud before their fixed releases allows remote authenticated users to execute arbitrary code over network services. The vulnerable component and exact input path are not disclosed in QNAP's advisory or CVE record, which only identifies a stack-based overwrite. Exploitation requires the high-privilege access reflected in the published CVSS assessment; successful exploitation can compromise confidentiality, integrity, and availability.
Summary
What happened
A stack buffer overflow in QNAP QTS, QuTS hero, and QuTScloud before their fixed releases allows remote authenticated users to execute arbitrary code over network services. The vulnerable component and exact input path are not disclosed in QNAP's advisory or CVE record, which only identifies a stack-based overwrite. Exploitation requires the high-privilege access reflected in the published CVSS assessment; successful exploitation can compromise confidentiality, integrity, and availability.
The record
- CVE
- CVE-2021-34343
- Published
- Sep 10, 2021
- Updated
- Sep 16, 2024
- Vendor
- Linn Products Limited
- Product
- QuTS hero
- Classifications
- CWE-787, T1190
- Attack vector
- network
- Privileges
- admin
Timeline
How it unfolded
- Sep 10, 2021CVE publishedPublication date reported by the CVE source.
- Sep 16, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <h4.5.4.1771 build 20210825
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
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