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FirefoxWeb browser · Mozilla

CVE-2012-1948

HIGH · 9.3 CVSS v2.0 Published 2012-07-18
Fix available
A fix is available. Upgrade to after 2.10 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 4.x through 13.0, Firefox ESR 10.x before 10.0.6, Thunderbird 5.0 through 13.0, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11 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 Mozilla's Gecko browser engine allow remote attackers to crash the application or potentially execute arbitrary code through unspecified vectors affecting Firefox 4-13, Firefox ESR 10.x before 10.0.6, Thunderbird 5-13, Thunderbird ESR 10.x before 10.0.6, and SeaMonkey before 2.11.

MitigationUpdate affected Mozilla products to patched versions (Firefox 13.0.1+, Firefox ESR 10.0.6+, Thunderbird 13.0.1+, Thunderbird ESR 10.0.6+, SeaMonkey 2.11+) to remediate the memory corruption vulnerabilities in the browser engine.

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
ThunderbirdApplication
Affected:= 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= 10.0.2
Thunderbird EsrApplication
Affected:= 10.0= 10.0.1= 10.0.2= 10.0.3= 10.0.4= 10.0.5
SeamonkeyApplication
Affected:<= 2.10= 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
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 Firefox, Thunderbird, or SeaMonkey is installed on the system by looking in common installation directories or using system package managers
    Affected if Any of these three products are present
  2. Check Firefox version
    For Firefox, navigate to Help > About Firefox or enter 'about:support' in the address bar to display the version number. On Linux, run 'firefox --version'. On Windows, check the executable properties or registry.
    Affected if Version is 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, or 9.0
  3. Check Thunderbird version
    For Thunderbird, navigate to Help > About Thunderbird to display the version number. On Linux, run 'thunderbird --version'. On Windows, check the executable properties or registry.
    Affected if Version is 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, or ESR version 10.0 through 10.0.5
  4. Check SeaMonkey version
    For SeaMonkey, navigate to Help > About SeaMonkey to display the version number. On Linux, run 'seamonkey --version'. Check the executable properties on Windows.
    Affected if Version is 2.10 or lower, or any 1.x version (1.0 through 1.1)

The system is affected if Firefox versions 4.0-9.0, Thunderbird versions 5.0-10.0.2 or ESR 10.0-10.0.5, or SeaMonkey version 2.10 or lower (including all 1.x versions) are installed.

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 2.10
Interim mitigation

Update affected Mozilla products to patched versions (Firefox 13.0.1+, Firefox ESR 10.0.6+, Thunderbird 13.0.1+, Thunderbird ESR 10.0.6+, SeaMonkey 2.11+) to remediate the memory corruption vulnerabilities in the browser engine.

Recommended fix High confidence

Firefox ESR 10.0.6+ / Thunderbird ESR 10.0.6+ / SeaMonkey 2.11+ / Firefox 14.0+ / Thunderbird 14.0+

  1. For Firefox ESR 10.x users: Upgrade to Firefox ESR 10.0.6 or later
  2. For Thunderbird ESR 10.x users: Upgrade to Thunderbird ESR 10.0.6 or later
  3. For SeaMonkey users: Upgrade to SeaMonkey 2.11 or later
  4. For Firefox (non-ESR) users: Upgrade to Firefox 14.0 or later
  5. For Thunderbird (non-ESR) users: Upgrade to Thunderbird 14.0 or later
  6. After upgrading, verify the version in Help > About to confirm the update was applied
Caveat Major version upgrades may introduce compatibility issues with older extensions or add-ons; test critical workflows before deploying broadly

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
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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-2012-1948 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