dbcve.org
FirefoxWeb browser · Mozilla

CVE-2014-1567

HIGH · 9.3 CVSS v2.0 Published 2014-09-03
Fix available
A fix is available. Upgrade to after 31.1.0 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
Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 32.0, Firefox ESR 24.x before 24.8 and 31.x before 31.1, and Thunderbird 24.x before 24.8 and 31.x before 31.1 allows remote attackers to execute arbitrary code via text that is improperly handled during the interaction between directionality resolution and layout.

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

Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox and Thunderbird allows remote attackers to execute arbitrary code via specially crafted text that triggers improper memory handling during directionality resolution and layout interaction.

MitigationApply vendor patches by updating Firefox to version 32.0 or later, Firefox ESR to 24.8/31.1 or later, and Thunderbird to 24.8/31.1 or later through standard patch management processes.

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:<= 31.1.0= 30.0= 31.0= 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= 24.7
ThunderbirdApplication
Affected:= 24.0= 24.0.1= 24.1= 24.1.1= 24.2= 24.3= 24.4= 24.5= 24.6= 24.7= 31.0

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
M
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:M/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. Identify installed Mozilla product
    Check if Mozilla Firefox (standard or ESR) or Thunderbird is installed on the system by looking in program directories (e.g., C:\Program Files\Mozilla Firefox on Windows, /Applications/Firefox on macOS, or /usr/lib/firefox on Linux) or check the system package manager
    Affected if Any of these three products (Firefox, Firefox ESR, or Thunderbird) are present
  2. Determine Firefox version
    Open Firefox, go to Help > About Firefox, or enter 'about:support' in the address bar to display the version number
    Affected if Version is 31.1.0 or earlier, or exactly matches 30.0, 31.0, 24.0, 24.0.1, 24.0.2, 24.1.0, or 24.1.1
  3. Determine Firefox ESR version
    Open Firefox ESR, go to Help > About Firefox, or enter 'about:support' in the address bar - the ESR designation will appear in the version string (e.g., 24.7esr)
    Affected if Version exactly matches 24.2, 24.3, 24.4, 24.5, 24.6, or 24.7 (with esr suffix)
  4. Determine Thunderbird version
    Open Thunderbird, go to Help > About Thunderbird, or enter 'about:support' in the address bar to display the version number
    Affected if Version exactly matches 24.0, 24.0.1, 24.1, 24.1.1, 24.2, 24.3, 24.4, 24.5, 24.6, 24.7, or 31.0

The environment is affected if Firefox (any channel), Firefox ESR, or Thunderbird matches any of the specific version numbers listed in the affected versions range.

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 31.1.0
Interim mitigation

Apply vendor patches by updating Firefox to version 32.0 or later, Firefox ESR to 24.8/31.1 or later, and Thunderbird to 24.8/31.1 or later through standard patch management processes.

Recommended fix High confidence

Firefox 32.0+ | Firefox ESR 24.8+ or 31.1+ | Thunderbird 24.8+ or 31.1+

  1. 1. Determine the currently installed Mozilla product (Firefox or Thunderbird) and its exact version by checking About/Help menu
  2. 2. For Firefox users on version 24.0, 30.0, or 31.0: upgrade to Firefox 32.0 or later
  3. 3. For Firefox ESR users on version 24.2, 24.3, 24.4, or 24.5: upgrade to Firefox ESR 24.8 or later
  4. 4. For Firefox ESR users on version 31.x before 31.1: upgrade to Firefox ESR 31.1 or later
  5. 5. For Thunderbird users on version 24.0, 24.0.1, 24.1, or 24.1.1: upgrade to Thunderbird 24.8 or later
  6. 6. For Thunderbird users on version 31.x before 31.1: upgrade to Thunderbird 31.1 or later
  7. 7. After upgrade, verify the new version in the About section to confirm the patch was applied
Caveat Minor: Upgrading across major version branches may introduce minor UI or extension compatibility changes; backup bookmarks and preferences before upgrading

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

Fix this in Firefox Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing2.0 h
  • Review / QA1.0 h
9.0 hours of engineering $1,600
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,560.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2014-1567 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

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-2014-1567 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

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