dbcve.org
QufirewallApplication · Qnap

CVE-2023-23356

HIGH · 7.2 CVSS v3.1 Published 2024-12-19
Fix available
A fix is available. Upgrade to 2.3.3 or later.
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 command injection vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to execute arbitrary commands. We have already fixed the vulnerability in the following versions: QuFirewall 2.3.3 ( 2023/03/27 ) and later 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

Command injection vulnerability in QNAP QuFirewall allowing remote attackers with administrator access to execute arbitrary commands on the affected system.

MitigationUpdate QuFirewall to version 2.3.3 (released 2023/03/27) or later to remediate this vulnerability.

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
QufirewallApplication
Affected:< 2.3.3

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. Verify QuFirewall is installed
    Check if QNAP QuFirewall is installed on the QNAP system. This can typically be done via the QNAP App Center or by checking for the QuFirewall package in the system.
    Affected if QuFirewall is not installed on the system, this CVE does not apply.
  2. Determine the installed QuFirewall version
    Access the QNAP admin interface, navigate to the QuFirewall application, and locate the version information typically displayed in the application settings or about section. Alternatively, use QNAP CLI tools if available to query the installed package version.
    Affected if Unable to retrieve version information, treat as potentially affected.
  3. Compare installed version against affected range
    Compare the installed QuFirewall version number to the affected range of versions less than 2.3.3. If the installed version is any build or release below 2.3.3, the system is affected by this vulnerability.
    Affected if Installed version is 2.3.2 or lower (any version below 2.3.3).
  4. Verify administrator access exists
    This vulnerability requires an attacker to have administrator-level access to QuFirewall. Review user accounts and access permissions to the QuFirewall admin interface.
    Affected if Administrator access to QuFirewall is available to unauthorized users, the exploit condition is met.

The environment is affected if QuFirewall is installed and the running version is any release below 2.3.3, combined with accessible administrator privileges.

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
Upgrade available Upgrade to 2.3.3 or later
Fixed in 2.3.3
Interim mitigation

Update QuFirewall to version 2.3.3 (released 2023/03/27) or later to remediate this vulnerability.

Recommended fix High confidence

QuFirewall 2.3.3 or later

  1. Log in to the QNAP admin interface as administrator
  2. Navigate to QuFirewall application settings
  3. Check the current installed version of QuFirewall
  4. If the version is below 2.3.3, locate the update or upgrade option within the QuFirewall settings
  5. Upgrade to QuFirewall version 2.3.3 or later (released 2023/03/27)
  6. Verify the upgrade completed successfully by checking the version number

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

Fix this in Qufirewall Scoped from the published advisory
  • Consultation1.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,040
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,664.

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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-2023-23356 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