CVE-2023-45043

Memory Safety in Qnap Qts 5.1.0.2348 … 5.1.3.2578

Memory Safety

Published

05 January 2024

Modified

21 November 2024

Patch / advisory

View advisory

CVSS Score v3.1 3.8

Click a component to see what it means

Raw vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L

EPSS Score 0.0064 50th percentile

Risk Priority 33 floored blend · peak EPSS

CVSS and EPSS are reproduced from their sources (NVD, FIRST EPSS). Risk Priority is our own derived reading, not an NVD score.

Summary

CVE-2023-45043 is a low-severity Classic Buffer Overflow (CWE-120) vulnerability in Qnap Qts. Its CVSS base score is 3.8 (Low).

Operationally, exploitation aligns with the MITRE ATT&CK technique NTDS (T1003.003); ranked at the 50th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2023-49364

Vulnerability Data

A buffer copy without checking size of input vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated administrators to execute code via a network. We have already fixed the vulnerability in…

the following versions: QTS 5.1.4.2596 build 20231128 and later QuTS hero h5.1.4.2596 build 20231128 and later

CWE(s): CWE-120

Related Threats

MITRE ATT&CK Enterprise Techniques

T1003.003 NTDS Credential Access

Adversaries may attempt to access or create a copy of the Active Directory domain database in order to steal credential information, as well as obtain other information about domain members such as devices, users, and access rights.

attack.mitre.org →

T1003.004 LSA Secrets Credential Access

Adversaries with SYSTEM access to a host may attempt to access Local Security Authority (LSA) secrets, which can contain a variety of different credential materials, such as credentials for service accounts.

attack.mitre.org →

T1003.006 DCSync Credential Access

Adversaries may attempt to access credentials and other sensitive information by abusing a Windows Domain Controller's application programming interface (API)(Citation: Microsoft DRSR Dec 2017) (Citation: Microsoft GetNCCChanges) (Citati…

attack.mitre.org →

T1003.008 /etc/passwd and /etc/shadow Credential Access

Adversaries may attempt to dump the contents of <code>/etc/passwd</code> and <code>/etc/shadow</code> to enable offline password cracking.

attack.mitre.org →

T1010 Application Window Discovery Discovery

Adversaries may attempt to get a listing of open application windows.

attack.mitre.org →

T1012 Query Registry Discovery

Adversaries may interact with the Windows Registry to gather information about the system, configuration, and installed software.

attack.mitre.org →

Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2023-45039Same product: Qnap Qts

CVE-2023-45044Same product: Qnap Qts

CVE-2025-52863Same product: Qnap Qts

CVE-2023-45040Same product: Qnap Qts

CVE-2023-32975Same product: Qnap Qts

CVE-2025-52864Same product: Qnap Qts

CVE-2023-45042Same product: Qnap Qts

CVE-2025-52872Same product: Qnap Qts

CVE-2023-32968Same product: Qnap Qts

CVE-2023-45041Same product: Qnap Qts

Affected Assets

qnap

qts

5.1.0.2348, 5.1.0.2399, 5.1.0.2418, 5.1.0.2444, 5.1.0.2466

qnap

quts hero

h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, h5.1.0.2466, h5.1.1.2488

Mitigating Controls

Control response

Prevent

Stop it (NIST 800-53)

—

Detect

Catch it (NIST detect / respond)

—

Harden

Shrink the surface (DISA STIG)

—

Validate

Prove the fix (OWASP ASVS)

V5.2.1

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing and analysis can find missing size checks before deployment.

SI-10 Information Input Validation good match

Input validation directly enforces size checks before buffer copies.

SA-8 Security and Privacy Engineering Principles partial match

Engineering principles require bounds checking and safe buffer handling in design.

SI-16 Memory Protection partial match

Memory protection limits the impact of an overflow once it occurs.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

ID.RA-01 partial match

blocks

Vulnerability identification processes such as code review or scanning detect classic buffer overflows before exploitation.

PR.PS-02 partial match

blocks

Routine patching replaces vulnerable code containing unchecked buffer copies with corrected versions.

PR.PS-06 partial match

blocks

Secure development practices directly enforce bounds checking and input validation that prevent classic buffer overflows.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.5.14 Information transfer partial match

removes

A.5.15 Access control partial match

removes

A.5.16 Identity management partial match

removes

A.5.17 Authentication information partial match

removes

A.5.18 Access rights partial match

removes

A.8.10 Information deletion partial match

removes

References

https://www.qnap.com/en/security-advisory/qsa-23-27
Vendor Advisory · security@qnapsecurity.com.tw
https://www.qnap.com/en/security-advisory/qsa-23-27
Vendor Advisory · af854a3a-2127-422b-91ae-364da2661108