FirefoxWeb browser · Mozilla

CVE-2014-1562

HIGH · 10.0 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

NVD · unedited

Unspecified vulnerability in the browser engine 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 cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Technical summary

dbcve analysis · moderate confidence

Memory corruption vulnerability in the Mozilla browser engine (Gecko) affecting Firefox and Thunderbird. The unspecified flaw allows remote attackers to cause denial of service through memory corruption and application crash, with potential for arbitrary code execution via unknown vectors.

MitigationUpgrade Mozilla 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. Apply via 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

NVD · CPE data

FirefoxWeb browser

Affected:= 24.0= 24.0.1= 24.0.2= 24.1.0= 24.1.1= 31.0<= 31.1.0= 30.0

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

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?

dbcve checks

Work through these to decide whether this CVE applies to you.

Check Firefox version on Windows

Open Command Prompt and run: firefox --version OR check C:\Program Files\Mozilla Firefox\firefox.exe properties for version info

Affected if Version equals 24.0, 24.0.1, 24.0.2, 24.1.0, 24.1.1, 30.0, 31.0, or 31.1.0 or earlier
Check Firefox ESR version on Windows

Open Command Prompt and run: firefox --version OR check C:\Program Files\Mozilla Firefox\firefox.exe properties for version info

Affected if Version equals 24.2, 24.3, 24.4, 24.5, 24.6, or 24.7 (ESR branch)
Check Thunderbird version on Windows

Open Command Prompt and run: thunderbird --version OR check C:\Program Files\Mozilla Thunderbird\thunderbird.exe properties for version info

Affected if Version equals 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
Check Firefox version on Linux

Run: firefox --version OR rpm -q firefox OR dpkg -l firefox

Affected if Version matches the affected Firefox or Firefox ESR ranges listed above
Check Thunderbird version on Linux

Run: thunderbird --version OR rpm -q thunderbird OR dpkg -l thunderbird

Affected if Version matches the affected Thunderbird range listed above

You are affected if any installed instance of Firefox (including ESR) or Thunderbird matches one of the specific version numbers in the affected ranges, as this is a memory corruption flaw in the Gecko engine that triggers during normal browser use.

Generated from the published advisory. Verify against your own configuration.

Remediation

dbcve · scoped

Upgrade available Upgrade to a release after 31.1.0

Interim mitigation

Upgrade Mozilla 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. Apply via standard patch management processes.

Recommended fix High confidence

Firefox 32.0+, Firefox ESR 24.8+/31.1+, Thunderbird 24.8+/31.1+

Upgrade Firefox to version 32.0 or later
Upgrade Firefox ESR to version 24.8 or later, or 31.1 or later
Upgrade Thunderbird to version 24.8 or later, or 31.1 or later

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

Fix this in Firefox Scoped from the published advisory

Consultation2.0 h
Implementation3.0 h
Testing2.0 h
Review / QA1.0 h

8.0 hours of engineering $1,420

Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $2,272.

Scan for this in your stack

Free · runs locally

dbcve dependency scanner

Check whether your project pulls in CVE-2014-1562 — 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

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2014-1562 in production — separate from our analysis above.

Notes0 Guidelines

Know something about CVE-2014-1562?

The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.

The version that genuinely resolved it — not the one the vendor claimed
A config change or rule that shut the vector down
A gotcha in the upgrade path that cost you an afternoon

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

At a glance

A fix existsUpgrade to after 31.1.0 or later

Severity 10.0 High

Exploit likelihood EPSS, next 30 days 5.6%

Affects: Firefox

Remediation

A high-priority fix

Fix this in Firefox 8 hrs · Low

Typical engagement from $1,420

Get a fix See the full breakdown ↓

A high-priority vulnerability. Send your environment and a specialist will scope CVE-2014-1562 and return a fixed quote and timeline.

You’ll deal with our team directly and deploy the reviewed fix to staging first — never straight to production.

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.

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.

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.

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.

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.

Check your environment

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.

Scan for this in your stack

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Practitioner notes

No notes yet

Official description

Technical summary

Affected products & versions

CVSS breakdown

Am I affected?

Remediation

References