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QtsOperating system · Qnap

CVE-2024-27129

HIGH · 8.8 CVSS v3.1 Published 2024-05-21
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
94/100
Remediation priority · Urgent
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 users to execute code via a network. We have already fixed the vulnerability in the following version: QTS 5.1.7.2770 build 20240520 and later QuTS hero h5.1.7.2770 build 20240520 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

A buffer copy without checking size of input vulnerability (likely a buffer overflow) in QNAP QTS and QuTS hero operating systems allows authenticated users to execute arbitrary code via network. The vulnerability stems from insufficient bounds checking when copying data into a fixed-size buffer.

MitigationUpgrade affected QNAP devices to QTS 5.1.7.2770 build 20240520 or later, or QuTS hero h5.1.7.2770 build 20240520 or later. Until patched, limit administrative access to trusted users only to reduce attack surface.

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= 5.1.5.2679= 5.1.6.2722
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= h5.1.5.2680= h5.1.6.2734

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

CVSS:3.1/AV:N/AC:L/PR:L/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 operating system
    Log into the QNAP device web interface and check the dashboard, or run `cat /etc/os-release` via SSH to determine if the device runs QTS or QuTS hero.
    Affected if The device runs QTS or QuTS hero; this determines which version list applies.
  2. Locate the firmware build version
    In the web interface, go to Control Panel > System > Firmware > About to view the build number. Alternatively, via SSH run `cat /etc/config/version` or check the System Information page in the admin dashboard.
    Affected if The exact build version is visible for comparison.
  3. Compare QTS version against affected builds
    If running QTS, compare your build number to the affected list: 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, 5.1.5.2679, 5.1.6.2722.
    Affected if The installed QTS build exactly matches one of these version numbers.
  4. Compare QuTS hero version against affected builds
    If running QuTS hero, compare your build number to the affected list: 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, h5.1.5.2680, h5.1.6.2734.
    Affected if The installed QuTS hero build exactly matches one of these version numbers.
  5. Verify administrative access method
    Check if the device administrative interface (HTTP/HTTPS on ports 8080/443 or SSH on port 22) is exposed to untrusted networks or if QVPN or myQNAPcloud services are enabled.
    Affected if The device is accessible to untrusted users over the network, which is required to exploit this authenticated vulnerability.

A user is affected if their QTS or QuTS hero build matches one of the listed versions AND the device administrative 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 affected QNAP devices to QTS 5.1.7.2770 build 20240520 or later, or QuTS hero h5.1.7.2770 build 20240520 or later. Until patched, limit administrative access to trusted users only to reduce attack surface.

Recommended fix High confidence

QTS 5.1.7.2770 build 20240520 or later; QuTS hero h5.1.7.2770 build 20240520 or later

  1. 1. Identify the currently installed QTS or QuTS hero version by accessing the QNAP admin interface
  2. 2. Navigate to Control Panel > System > Firmware Update
  3. 3. If the current version is 5.1.0.2348, 5.1.0.2399, 5.1.0.2418, or 5.1.0.2444 (for QTS) or h5.1.0.2409, h5.1.0.2424, h5.1.0.2453, or h5.1.0.2466 (for QuTS hero), proceed with update
  4. 4. Update to QTS 5.1.7.2770 build 20240520 or later (for QTS systems)
  5. 5. Update to QuTS hero h5.1.7.2770 build 20240520 or later (for QuTS hero systems)
  6. 6. Verify the update was successful by confirming the new firmware version in the admin interface

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

Fix this in Qts Scoped from the published advisory
  • Consultation4.0 h
  • Implementation3.0 h
  • Testing4.0 h
  • Review / QA2.0 h
13.0 hours of engineering $2,300
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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-2024-27129 in production — separate from our analysis above.

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