dbcve.org
FirefoxWeb browser · Mozilla

CVE-2024-11693

CRITICAL · 9.8 CVSS v3.1 Published 2024-11-26
Fix available
A fix is available. Upgrade to 128.5.0 / 133.0 or later.
See remediation →
100/100
Remediation priority · Urgent
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
The executable file warning was not presented when downloading .library-ms files. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

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

Firefox and Thunderbird failed to display the executable file warning when downloading .library-ms files on Windows, bypassing a security safeguard that warns users about potentially dangerous file types.

MitigationUpdate to Firefox 133, Firefox ESR 128.5, Thunderbird 133, or Thunderbird 128.5. Until updated, avoid opening .library-ms files downloaded from untrusted sources.

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
FirefoxWeb browser
Affected:< 128.5.0< 133.0
ThunderbirdApplication
Affected:< 128.5.0>= 129.0, < 133.0

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
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/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 Windows operating system
    Check if the system is running Windows (this vulnerability only affects Windows platforms). You can check via system information or command: 'systeminfo' on Windows or review system properties.
    Affected if The system is not running Windows - this vulnerability does not affect other operating systems.
  2. Identify installed Mozilla product
    Determine if Mozilla Firefox or Thunderbird is installed. Check the application list, installed programs, or look for the executable in standard installation directories (typically C:\Program Files\Mozilla Firefox or C:\Program Files\Mozilla Thunderbird).
    Affected if Neither Firefox nor Thunderbird is installed - the vulnerability only applies to these products.
  3. Check Firefox version
    Open Firefox and navigate to Menu > Help > About Firefox, or enter 'about:support' in the address bar. Alternatively, check the version property of the firefox.exe file in the installation directory.
    Affected if The installed Firefox version is below 128.5.0 or is any version from 129.0 through 132.x (versions below 133.0 that are not 128.5.0).
  4. Check Thunderbird version
    Open Thunderbird and navigate to Menu > Help > About Thunderbird, or check the version property of the thunderbird.exe file in the installation directory.
    Affected if The installed Thunderbird version is below 128.5.0 or is any version from 129.0 through 132.x (versions below 133.0 that are not 128.5.0).

A user is affected if they are running Firefox or Thunderbird on Windows with a version that falls below 128.5.0 or between 129.0 and 132.x, and they download or handle .library-ms files.

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 128.5.0 / 133.0 or later
Fixed in 128.5.0133.0
Interim mitigation

Update to Firefox 133, Firefox ESR 128.5, Thunderbird 133, or Thunderbird 128.5. Until updated, avoid opening .library-ms files downloaded from untrusted sources.

Recommended fix High confidence

Firefox 133.0+ / Firefox ESR 128.5.0+ / Thunderbird 133.0+ / Thunderbird 128.5.0+

  1. 1. Open Firefox or Thunderbird and navigate to the Help menu
  2. 2. Select 'About Firefox' or 'About Thunderbird' to check the current version
  3. 3. If the version is below 133.0 (or below 128.5.0 for ESR/Thunderbird), click to download and install the update
  4. 4. Alternatively, download the latest version from the official Mozilla website: https://www.mozilla.org/
  5. 5. Restart the application after the update completes
  6. 6. Verify the version now shows 133.0 or later, or 128.5.0 or later for ESR

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

Fix this in Firefox 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.

Scan for this in your stack

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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-2024-11693 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