Security Resilience

CVE-2023-32967

Access Control in Qnap Qts 4.5.4.1715 … 4.5.4.2627

Published
02 February 2024
Modified
21 November 2024
Patch / advisory
CVSS Score v3.1 5.0
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
EPSS Score 0.0033 24th percentile
Risk Priority 38 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-2023-32967 is a medium-severity Improper Authorization (CWE-285) vulnerability in Qnap Qts. Its CVSS base score is 5.0 (Medium).

Operationally, ranked at the 24th 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 AC-24 (Access Control Decisions) and AC-25 (Reference Monitor) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

An incorrect authorization vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow authenticated users to bypass intended access restrictions via a network. QTS 5.x, QuTS hero are not affected. We have already…

more

fixed the vulnerability in the following versions: QuTScloud c5.1.5.2651 and later QTS 4.5.4.2627 build 20231225 and later

CWE(s)

Related Threats

CVEs Like This One

CVE-2023-50363Same product: Qnap Qts
CVE-2021-28799Same product: Qnap Qts
CVE-2023-32972Same product: Qnap Qts
CVE-2023-32971Same product: Qnap Qts
CVE-2023-23362Same product: Qnap Qts
CVE-2019-7192Same product: Qnap Qts
CVE-2018-19953Same product: Qnap Qts
CVE-2017-6361Same product: Qnap Qts
CVE-2018-19943Same product: Qnap Qts
CVE-2017-6360Same product: Qnap Qts

Affected Assets

qnap
qts
4.5.4.1715, 4.5.4.1723, 4.5.4.1741, 4.5.4.1787, 4.5.4.1800
qnap
qutscloud
c5.1.0.2498

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

Mandates that access-control decisions are made and applied to each request before access occurs.

Requires a tamperproof, always-invoked reference monitor that performs authorization checks.

Directly requires enforcement of approved authorizations for every access request, stopping improper or missing checks.

Limits granted privileges so that even a bypassed check affects fewer resources.

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.

blocks

A.5.1 only requires the existence of an overarching policy and topic-specific policies (including on access control); it does not itself perform or enforce any authorization check, so the CWE-285 weakness can still be exploited.

blocks

Mapping access rights to information classification and business requirements forces correct enforcement of authorization decisions, blocking the incorrect authorization weakness at the policy and implementation stage.

blocks

A.5.18's provisioning, revocation, review and adjustment of access rights (incl. before role changes/termination, with segregation and owner approval) directly stops incorrect authorization decisions from being exploitable in the vast majority of cases; the bounded remainder is incorrectness inside the authorization logic itself (e.g. flawed conditional or missing check) rather than rights that were wrongly granted.

finds

Independent reviewers evaluate whether authorization logic matches policy, thereby reducing the window in which incorrect or missing authorization checks remain in production.

finds

By requiring managers to verify that authorization decisions match policy and to remediate deviations, the control limits the persistence of incorrect or missing authorization checks.

blocks

Requiring authorization processes and privilege assignments to be specified during project initiation prevents downstream components from receiving overly broad or incorrect rights that would allow unauthorized actions.

Hardening callouts derived

DISA STIG baselines are authored against specific weaknesses. Where this CVE cites a broad weakness class, the mapping is not asserted at that abstraction (owner ruling, 2026-09-25: grade only at Base and below), so no rule is shown here rather than a rule shown against the wrong grain.

  • No fine-grained STIG row for CWE-285, a class-level weakness. Rules are authored against its narrower children: CWE-552.
  • No fine-grained STIG row for CWE-863, a class-level weakness, and none of its children carries one either.

References