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QtsOperating system · Qnap

CVE-2023-32968

HIGH · 7.2 CVSS v3.1 Published 2023-12-08
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
78/100
Remediation priority · High
Remotely reachable Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
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 5.0.1.2514 build 20230906 and later QTS 5.1.2.2533 build 20230926 and later QuTS hero h5.0.1.2515 build 20230907 and later QuTS hero h5.1.2.2534 build 20230927 and later

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A buffer overflow vulnerability in QNAP QTS and QuTS hero operating systems allows authenticated administrators to achieve remote code execution via network. The flaw involves copying data without proper size validation, enabling an attacker with admin credentials to inject and execute arbitrary code.

MitigationUpdate QNAP devices to the specified fixed versions (QTS 5.0.1.2514+, QTS 5.1.2.2533+, QuTS hero h5.0.1.2515+, or QuTS hero h5.1.2.2534+) or later. Since this requires administrative authentication, enforce least-privilege admin accounts and consider network segmentation to limit exposure.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
QtsOperating system
Affected:= 5.1.0.2348= 5.1.0.2399= 5.1.0.2418= 5.1.0.2444= 5.1.0.2466= 5.1.1.2491= 5.0.1.2034= 5.0.1.2079= 5.0.1.2131= 5.0.1.2137= 5.0.1.2145= 5.0.1.2173
Quts HeroOperating system
Affected:= h5.1.0.2409= h5.1.0.2424= h5.1.0.2453= h5.1.0.2466= h5.1.1.2488= h5.0.1.2045= h5.0.1.2192= h5.0.1.2248= h5.0.1.2269= h5.0.1.2277= h5.0.1.2348= h5.0.1.2376

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check QTS or QuTS hero version via web UI
    Log into the QNAP admin web interface. Navigate to Control Panel > System > System Information. Locate the 'Firmware Version' field.
    Affected if The displayed version matches any of the following: 5.1.0.2348, 5.1.0.2399, 5.1.0.2418, 5.1.0.2444, 5.1.0.2466, 5.1.1.2491, 5.0.1.2034, 5.0.1.2079, 5.0.1.2131, 5.0.1.2137, 5.0.1.2145, 5.0.1.2173 (for QTS) or h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, h5.1.0.2466, h5.1.1.2488, h5.0.1.2045, h5.0.1.2192, h
  2. Check QTS version via command line
    Access the device via SSH or terminal. Run the command: cat /etc/config/quts_version or getsysinfo version
    Affected if The reported version matches any affected version listed in the CVE.
  3. Confirm product type is QTS or QuTS hero
    In the web UI System Information page, verify whether the operating system is labeled as 'QTS' or 'QuTS hero'. Alternatively, run: cat /etc/config/.os_version
    Affected if The product is QTS or QuTS hero and the version matches an affected version from the CVE list.
  4. Verify if administrative accounts exist
    In the web UI, go to Control Panel > User > Admin Authorisation or check if any user accounts are assigned administrator privileges.
    Affected if Administrator-level accounts are present on the system, which is required for exploitation of this vulnerability.

The system is affected if it runs QTS or QuTS hero with any version matching those listed in the CVE and has at least one administrator account accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Update QNAP devices to the specified fixed versions (QTS 5.0.1.2514+, QTS 5.1.2.2533+, QuTS hero h5.0.1.2515+, or QuTS hero h5.1.2.2534+) or later. Since this requires administrative authentication, enforce least-privilege admin accounts and consider network segmentation to limit exposure.

Recommended fix High confidence

Upgrade to QTS 5.0.1.2514+ or 5.1.2.2533+ (or QuTS hero h5.0.1.2515+ / h5.1.2.2534+) depending on your current major version branch

  1. 1. Log in to the QNAP device as an administrator via the web management interface.
  2. 2. Navigate to Control Panel > System > Firmware Update.
  3. 3. Select "Check for Update" to identify the latest available firmware version.
  4. 4. If your current version is QTS 5.0.x, upgrade to QTS 5.0.1.2514 (build 20230906) or later.
  5. 5. If your current version is QTS 5.1.x, upgrade to QTS 5.1.2.2533 (build 20230926) or later.
  6. 6. For QuTS hero users on 5.0.x, upgrade to h5.0.1.2515 (build 20230907) or later.
  7. 7. For QuTS hero users on 5.1.x, upgrade to h5.1.2.2534 (build 20230927) or later.
  8. 8. After upgrade completes, verify the new firmware version matches or exceeds the fixed versions specified.
Caveat Firmware updates may introduce feature changes; always review release notes before upgrading production devices

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Qts Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2023-32968 in production — separate from our analysis above.

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