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FirefoxWeb browser · Mozilla

CVE-2012-1937

HIGH · 9.3 CVSS v2.0 Published 2012-06-05
Fix available
A fix is available. Upgrade to after 2.9 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 12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0 through 12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10 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 · moderate confidence

Multiple unspecified vulnerabilities exist in the browser engine of Mozilla Firefox 4.x-12.0, Firefox ESR 10.x before 10.0.5, Thunderbird 5.0-12.0, Thunderbird ESR 10.x before 10.0.5, and SeaMonkey before 2.10. These flaws allow remote attackers to cause memory corruption leading to denial of service (application crash) or potentially execute arbitrary code via unknown attack vectors.

MitigationUpdate all affected Mozilla products to the patched versions: Firefox 13.0+, Firefox ESR 10.0.5+, Thunderbird 13.0+, Thunderbird ESR 10.0.5+, and SeaMonkey 2.10+. Deploy these updates across all affected endpoints in the environment.

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
SeamonkeyApplication
Affected:<= 2.9= 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
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

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. Check Firefox version
    Open Firefox, click Help > About Firefox, or run 'firefox --version' from command line
    Affected if Version is 4.0 through 12.0 (any version from 4.0 to 12.0 inclusive)
  2. Check SeaMonkey version
    Open SeaMonkey, click Help > About SeaMonkey, or run 'seamonkey --version' from command line
    Affected if Version is 2.9 or lower, or any 1.x version (1.0 through 1.1)
  3. Check Thunderbird version
    Open Thunderbird, click Help > About Thunderbird, or run 'thunderbird --version' from command line
    Affected if Version is 5.0 through 10.0.2 (any version from 5.0 to 10.0.2 inclusive)
  4. Check Thunderbird ESR version
    Open Thunderbird ESR, click Help > About Thunderbird, or run 'thunderbird --version' from command line
    Affected if Version is 10.0 through 10.0.4 (any version from 10.0 to 10.0.4 inclusive)

If any installed Mozilla product (Firefox, SeaMonkey, Thunderbird, or Thunderbird ESR) matches the affected version ranges listed above, the environment is vulnerable to CVE-2012-1937.

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 2.9
Interim mitigation

Update all affected Mozilla products to the patched versions: Firefox 13.0+, Firefox ESR 10.0.5+, Thunderbird 13.0+, Thunderbird ESR 10.0.5+, and SeaMonkey 2.10+. Deploy these updates across all affected endpoints in the environment.

Recommended fix High confidence

Firefox 13.0+ (or Firefox ESR 10.0.5+); Thunderbird 13.0+ (or Thunderbird ESR 10.0.5+); SeaMonkey 2.10+

  1. 1. Identify which Mozilla product is installed (Firefox, Thunderbird, Thunderbird ESR, or SeaMonkey) and note the current version.
  2. 2. For Firefox users: Upgrade to Firefox 13.0 or later, or upgrade to Firefox ESR 10.0.5 or later.
  3. 3. For Thunderbird users: Upgrade to Thunderbird 13.0 or later.
  4. 4. For Thunderbird ESR users: Upgrade to Thunderbird ESR 10.0.5 or later.
  5. 5. For SeaMonkey users: Upgrade to SeaMonkey 2.10 or later.
  6. 6. Download the appropriate fixed version from the official Mozilla website (https://www.mozilla.org/) or use your system's package manager to update.
  7. 7. Close all instances of the application before installing the update.
  8. 8. After installation, restart the application and verify the version number matches the expected fixed release.

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

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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-2012-1937 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