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FirefoxWeb browser · Mozilla

CVE-2012-0462

HIGH · 7.5 CVSS v2.0 Published 2012-03-14
Fix available
A fix is available. Upgrade to after 2.7 or later.
See remediation →
84/100
Remediation priority · High
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 4.x through 10.0, Firefox ESR 10.x before 10.0.3, Thunderbird 5.0 through 10.0, Thunderbird ESR 10.x before 10.0.3, and SeaMonkey before 2.8 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

Memory corruption vulnerabilities in the Mozilla browser engine (Gecko) allow remote attackers to crash the application or potentially achieve arbitrary code execution through unknown vectors, likely involving malformed HTML/CSS/JavaScript content processed by the rendering engine.

MitigationApply vendor-supplied patches by upgrading to Firefox ESR 10.0.3+, Thunderbird ESR 10.0.3+, or SeaMonkey 2.8+, or migrate to newer supported versions of these products.

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:= 4.0= 4.0.1= 5.0= 5.0.1= 6.0= 6.0.1= 6.0.2= 7.0= 7.0.1= 8.0= 8.0.1= 9.0
Firefox EsrWeb browser
Affected:= 10.1= 10.2
ThunderbirdApplication
Affected:= 5.0= 6.0= 6.0.1= 6.0.2= 7.0= 7.0.1= 8.0= 9.0= 9.0.1
Thunderbird EsrApplication
Affected:= 10.0= 10.0.1= 10.0.2
SeamonkeyApplication
Affected:<= 2.7= 1.0= 1.0.1= 1.0.2= 1.0.3= 1.0.4= 1.0.5= 1.0.6= 1.0.7= 1.0.8= 1.0.9= 1.1

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
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/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 checks

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

  1. Identify installed Mozilla product
    Check what Mozilla browser or email client is installed on the system (Firefox, Thunderbird, or SeaMonkey). On Windows, look in Program Files or the registry. On Linux, check installed packages via dpkg/rpm or look for the application in standard directories. On macOS, check the Applications folder.
    Affected if Any of the following products are installed: Firefox, Thunderbird, or SeaMonkey
  2. Get Firefox version
    For Firefox: Type 'about:support' in the address bar and look for 'Version' in the page, or check Help > About Firefox. On Windows, also check the registry key HKLM\SOFTWARE\Mozilla\Mozilla Firefox\CurrentVersion or HKCU\Software\Mozilla\Mozilla Firefox\CurrentVersion.
    Affected if Version matches 4.0, 4.0.1, 5.0, 5.0.1, 6.0, 6.0.1, 6.0.2, 7.0, 7.0.1, 8.0, 8.0.1, 9.0, 10.1, or 10.2 (ESR)
  3. Get Thunderbird version
    For Thunderbird: Type 'about:support' in the address bar and look for 'Version', or check Help > About Thunderbird. On Windows, check the registry key HKLM\SOFTWARE\Mozilla\Mozilla Thunderbird\CurrentVersion or HKCU\Software\Mozilla\Mozilla Thunderbird\CurrentVersion.
    Affected if Version matches 5.0, 6.0, 6.0.1, 6.0.2, 7.0, 7.0.1, 8.0, 9.0, 9.0.1, 10.0, 10.0.1, or 10.0.2 (ESR)
  4. Get SeaMonkey version
    For SeaMonkey: Type 'about:support' in the address bar and look for 'Version', or check Help > About SeaMonkey. On Linux, run 'seamonkey -v' or check installed packages.
    Affected if Version is 2.7 or lower, or matches 1.0 through 1.1 series (1.0, 1.0.1, 1.0.2, 1.0.3, 1.0.4, 1.0.5, 1.0.6, 1.0.7, 1.0.8, 1.0.9, 1.1)

The environment is affected if any installed Mozilla product (Firefox, Thunderbird, or SeaMonkey) matches the specific version numbers listed in the affected versions for that product.

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.

From vendor data
Upgrade available Upgrade to a release after 2.7
Interim mitigation

Apply vendor-supplied patches by upgrading to Firefox ESR 10.0.3+, Thunderbird ESR 10.0.3+, or SeaMonkey 2.8+, or migrate to newer supported versions of these products.

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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dbcve dependency scanner

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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-2012-0462 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