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FirefoxWeb browser · Mozilla

CVE-2014-1547

HIGH · 10.0 CVSS v2.0 Published 2014-07-23
Fix available
A fix is available. Upgrade to after 30.0 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
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 31.0, Firefox ESR 24.x before 24.7, and Thunderbird before 24.7 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

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

Multiple memory corruption vulnerabilities in the Mozilla browser engine (Gecko) affecting Firefox before 31.0, Firefox ESR 24.x before 24.7, and Thunderbird before 24.7. The unspecified flaws allow remote attackers to cause denial of service through application crashes or potentially execute arbitrary code via unknown vectors.

MitigationUpgrade to Firefox 31.0 or later, Firefox ESR 24.7 or later, or Thunderbird 24.7 or later to remediate these vulnerabilities.

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:<= 30.0= 24.0= 24.0.1= 24.0.2= 24.1.0= 24.1.1
Firefox EsrWeb browser
Affected:= 24.2= 24.3= 24.4= 24.5= 24.6
ThunderbirdApplication
Affected:<= 24.6= 24.0= 24.0.1= 24.1= 24.1.1= 24.2= 24.3= 24.4= 24.5

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
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:L/Au:N/C:C/I:C/A:C

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. Check Firefox version on Windows
    Open Firefox, click Help > About Firefox, or run `firefox --version` from command line, or check registry key HKLM\SOFTWARE\Mozilla\Mozilla Firefox\CurrentVersion
    Affected if Version is 30.0 or lower, or matches 24.0, 24.0.1, 24.0.2, 24.1.0, or 24.1.1
  2. Check Firefox ESR version on Windows
    Open Firefox ESR, click Help > About Firefox ESR, or run `firefox --version` from command line, or check registry key HKLM\SOFTWARE\Mozilla\Mozilla Firefox\CurrentVersion
    Affected if Version matches 24.2, 24.3, 24.4, 24.5, or 24.6
  3. Check Thunderbird version on Windows
    Open Thunderbird, click Help > About Thunderbird, or run `thunderbird --version` from command line, or check registry key HKLM\SOFTWARE\Mozilla\Mozilla Thunderbird\CurrentVersion
    Affected if Version is 24.6 or lower, or matches 24.0, 24.0.1, 24.1, 24.1.1, 24.2, 24.3, 24.4, or 24.5
  4. Check Firefox version on Linux
    Run `firefox --version` or `rpm -q firefox` or check the package manager
    Affected if Version is 30.0 or lower, or matches 24.0, 24.0.1, 24.0.2, 24.1.0, or 24.1.1
  5. Check Thunderbird version on Linux
    Run `thunderbird --version` or `rpm -q thunderbird` or check the package manager
    Affected if Version is 24.6 or lower, or matches 24.0, 24.0.1, 24.1, 24.1.1, 24.2, 24.3, 24.4, or 24.5

User is affected if any installed Firefox version is 30.0 or below, Firefox ESR is 24.6 or below, or Thunderbird is 24.6 or below, as these versions contain the vulnerable Gecko engine.

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 a release after 30.0
Interim mitigation

Upgrade to Firefox 31.0 or later, Firefox ESR 24.7 or later, or Thunderbird 24.7 or later to remediate these vulnerabilities.

Recommended fix High confidence

Firefox 31.0; Firefox ESR 24.7; Thunderbird 24.7

  1. 1. Identify the currently installed Mozilla product (Firefox, Firefox ESR, or Thunderbird) and its version number
  2. 2. For Firefox users: Download and install Firefox 31.0 or later from the official Mozilla website
  3. 3. For Firefox ESR users: Download and install Firefox ESR 24.7 or later from the official Mozilla website
  4. 4. For Thunderbird users: Download and install Thunderbird 24.7 or later from the official Mozilla website
  5. 5. After installation, restart the application to apply the update
  6. 6. Verify the updated version by checking Help > About in the application menu
Caveat Security update with minimal breaking changes; ESR users remain on the 24.x extended support branch

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-2014-1547 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