dbcve.org
QtsOperating system · Qnap

CVE-2023-39296

HIGH · 7.5 CVSS v3.1 Published 2024-01-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges 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 prototype pollution vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to override existing attributes with ones that have incompatible type, which may lead to a crash via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QuTS hero h5.1.3.2578 build 20231110 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

Prototype pollution in QNAP QTS and QuTS hero operating systems allows authenticated users to override object attributes with incompatible types via network requests, potentially causing a denial of service through application crash.

MitigationUpgrade QTS to version 5.1.3.2578 build 20231110 or later, or QuTS hero to h5.1.3.2578 build 20231110 or later. Verify the upgrade during a planned maintenance window with backups in place.

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
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

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
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 QTS or QuTS hero version
    Log into the QNAP admin web interface and navigate to Control Panel > System > Firmware Version, or run 'getconf' via SSH on the NAS to retrieve the firmware version
    Affected if The displayed version matches one of 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 for QTS, or h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, h5.1.0.2466, h5.1.1.2488, h5.1.2.2534 for QuTS hero
  2. Confirm network access to management interface
    Verify that the QNAP admin web interface (typically ports 8080 or 443) is accessible from network locations
    Affected if The management interface is exposed to network attackers, allowing unauthenticated or authenticated users to send requests
  3. Verify user authentication status
    Check whether default or additional admin accounts exist with network access privileges
    Affected if Any authenticated user account can be leveraged to exploit this vulnerability, so the presence of user accounts with network access increases exposure

You are affected if your QTS or QuTS hero version matches one of the listed versions and your admin interface is network-accessible to authenticated users.

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 5.1.3.2578 build 20231110 or later, or QuTS hero to h5.1.3.2578 build 20231110 or later. Verify the upgrade during a planned maintenance window with backups in place.

Recommended fix High confidence

QTS 5.1.3.2578 (build 20231110) or later / QuTS hero h5.1.3.2578 (build 20231110) or later

  1. 1. Log into the QNAP admin interface and navigate to Control Panel > System > Firmware Update to check the current QTS or QuTS hero version
  2. 2. Identify whether the running version is one of the affected versions: QTS 5.1.0.2348, 5.1.0.2399, 5.1.0.2418, or 5.1.0.2444; or QuTS hero h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, or h5.1.0.2466
  3. 3. If affected, create a full backup of all critical data stored on the NAS
  4. 4. From the Firmware Update page, check for and install the latest QTS or QuTS hero update
  5. 5. Verify the system has updated to QTS 5.1.3.2578 build 20231110 or later, or QuTS hero h5.1.3.2578 build 20231110 or later
Caveat Review QNAP release notes for QTS 5.1.3.x for any functionality changes or migration requirements before upgrading

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
  • Testing6.0 h
  • Review / QA2.0 h
14.0 hours of engineering $2,380
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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-2023-39296 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

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