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QtsOperating system · Qnap

CVE-2023-50359

MEDIUM · 6.7 CVSS v3.1 Published 2024-02-02
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
69/100
Remediation priority · Elevated
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
An unchecked return value vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow local authenticated administrators to place the system in a state that could lead to a crash or other unintended behaviors via unspecified vectors. We have already fixed the vulnerability in the following versions: QTS 5.1.5.2645 build 20240116 and later QuTS hero h5.1.5.2647 build 20240118 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 · moderate confidence

This is an unchecked return value vulnerability in QNAP QTS and QuTS hero operating systems. When functions return status values indicating errors or abnormal conditions, failing to check these values can allow the code to proceed in an invalid state. Local authenticated administrators can exploit this to place the system into an unstable condition leading to crashes or other unintended behaviors.

MitigationUpgrade QTS to version 5.1.5.2645 build 20240116 or later, or QuTS hero to version h5.1.5.2647 build 20240118 or later. Since this requires local authenticated administrator access, ensure proper admin account management 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= 5.1.2.2533= 5.1.3.2578= 5.1.4.2596= 5.1.5.2645
Quts HeroOperating system
Affected:= h5.1.0.2409= h5.1.0.2424= h5.1.0.2453= h5.1.0.2466= h5.1.1.2488= h5.1.2.2534= h5.1.3.2578= h5.1.4.2596= h5.1.5.2647
QutscloudOperating system
Affected:= c5.1.0.2498

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
Local
Complexity
Low
Privileges
High
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/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. Identify the QNAP system product and firmware version
    Access the QNAP admin web interface, go to Control Panel > System > Firmware Update, or run the command 'getsysinfo' via SSH to retrieve the product name and firmware version
    Affected if The product is QTS, QuTS hero, or QuTScloud and the version matches one of the affected versions listed in the CVE
  2. Confirm QTS version against affected list
    Compare the installed QTS version (for example, 5.1.5.2645) to the affected versions: 5.1.0.2348, 5.1.0.2399, 5.1.0.2418, 5.1.0.2444, 5.1.0.2466, 5.1.1.2491, 5.1.2.2533, 5.1.3.2578, 5.1.4.2596, or 5.1.5.2645
    Affected if The installed QTS version exactly matches any version in the affected list
  3. Confirm QuTS hero version against affected list
    Compare the installed QuTS hero version (for example, h5.1.5.2647) to the affected versions: h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, h5.1.0.2466, h5.1.1.2488, h5.1.2.2534, h5.1.3.2578, h5.1.4.2596, or h5.1.5.2647
    Affected if The installed QuTS hero version exactly matches any version in the affected list
  4. Confirm QuTScloud version against affected list
    Compare the installed QuTScloud version to the affected version c5.1.0.2498
    Affected if The installed QuTScloud version is c5.1.0.2498

The system is affected if it is running QTS, QuTS hero, or QuTScloud and the installed firmware version exactly matches one of the versions listed in the CVE affected products list.

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

Upgrade QTS to version 5.1.5.2645 build 20240116 or later, or QuTS hero to version h5.1.5.2647 build 20240118 or later. Since this requires local authenticated administrator access, ensure proper admin account management and consider network segmentation to limit exposure.

Recommended fix High confidence

QTS 5.1.5.2645 build 20240116 or later; QuTS hero h5.1.5.2647 build 20240118 or later

  1. 1. Log in to the QNAP device as administrator
  2. 2. Go to Control Panel > System > Firmware Update
  3. 3. Click "Check for Update" to see available updates
  4. 4. Select and install QTS 5.1.5.2645 build 20240116 or later (for QTS devices)
  5. 5. For QuTS hero devices, install h5.1.5.2647 build 20240118 or later
  6. 6. Restart the system after the update completes
  7. 7. Verify the firmware version matches or exceeds the fixed releases
Caveat Standard QNAP firmware update risks apply - ensure backups are in place before updating

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

Fix this in Qts Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
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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-2023-50359 in production — separate from our analysis above.

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What this is

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What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data