FirefoxWeb browser · Mozilla
CVE-2014-1594
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 · uneditedMozilla Firefox before 34.0, Firefox ESR 31.x before 31.3, Thunderbird before 31.3, and SeaMonkey before 2.31 might allow remote attackers to execute arbitrary code by leveraging an incorrect cast from the BasicThebesLayer data type to the BasicContainerLayer data type.
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 confidenceThis is a type confusion vulnerability in Mozilla's graphics layer system where code incorrectly casts a BasicThebesLayer pointer to BasicContainerLayer. This incorrect type cast leads to memory corruption that can be exploited for arbitrary code execution via specially crafted web content.
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
<= 31.2<= 33.0<= 2.30<= 31.2CVSS 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
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/Au:N/C:P/I:P/A:P
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 checksWork through these to decide whether this CVE applies to you.
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Identify installed Mozilla productCheck which Mozilla application is installed on the system (Firefox, Thunderbird, or SeaMonkey). On Windows, look in Program Files for Mozilla Firefox, Mozilla Thunderbird, or SeaMonkey. On Linux, check /usr/bin for firefox, thunderbird, or seamonkey. On macOS, check /Applications for Firefox, Thunderbird, or SeaMonkey.Affected if Any of these three products is installed
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Check Firefox version if installedRun 'firefox --version' from command line, or open Firefox and navigate to Help > About Firefox to view the version number.Affected if Firefox version is 31.2 or earlier, OR between 32.0 and 33.0 inclusive
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Check Thunderbird version if installedRun 'thunderbird --version' from command line, or open Thunderbird and navigate to Help > About Thunderbird to view the version number.Affected if Thunderbird version is 31.2 or earlier
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Check SeaMonkey version if installedRun 'seamonkey --version' from command line, or open SeaMonkey and navigate to Help > About SeaMonkey to view the version number.Affected if SeaMonkey version is 2.30 or earlier
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Note on exploitabilityThis is a code-level vulnerability in the graphics rendering layer that is present by default in affected versions. No specific browser feature or configuration needs to be enabled for the flaw to exist - it manifests when processing specially crafted web content.Affected if Running an affected version listed above
The environment is affected if any installed Mozilla product (Firefox, Thunderbird, or SeaMonkey) matches the affected version ranges: Firefox <= 31.2 or <= 33.0, Thunderbird <= 31.2, or SeaMonkey <= 2.30.
Generated from the published advisory. Verify against your own configuration.
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.
From vendor dataApply vendor-provided security updates to upgrade Firefox to 34.0+, Firefox ESR to 31.3+, Thunderbird to 31.3+, or SeaMonkey to 2.31+ as specified in the Mozilla security advisory.
Fix this in Firefox
Scoped from the published advisory
- Consultation1.0 h
- Implementation2.0 h
- Testing3.0 h
- Review / QA1.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,904.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2014-1594 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2014-1594 in production — separate from our analysis above.
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
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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.
- 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