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FirefoxWeb browser · Mozilla

CVE-2012-0469

HIGH · 10.0 CVSS v2.0 Published 2012-04-25
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
Use-after-free vulnerability in the mozilla::dom::indexedDB::IDBKeyRange::cycleCollection::Trace function in Mozilla Firefox 4.x through 11.0, Firefox ESR 10.x before 10.0.4, Thunderbird 5.0 through 11.0, Thunderbird ESR 10.x before 10.0.4, and SeaMonkey before 2.9 allows remote attackers to execute arbitrary code via vectors related to crafted IndexedDB data.

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

Use-after-free vulnerability in Mozilla's IndexedDB IDBKeyRange cycle collection trace function allows remote attackers to execute arbitrary code via crafted IndexedDB data. The flaw occurs when freed memory is accessed after being deallocated during the collection cycle, leading to potential code execution.

MitigationUpdate affected Mozilla products (Firefox, Firefox ESR, Thunderbird, Thunderbird ESR, SeaMonkey) to the patched versions that address this vulnerability.

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
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

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
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:L/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 the installed Mozilla product
    Check if Firefox, Thunderbird, or SeaMonkey is installed. On Windows, look in Program Files. On macOS, check /Applications. On Linux, run which firefox thunderbird seamonkey or check your package manager.
    Affected if Any of these products are installed
  2. Determine Firefox version
    Run 'firefox --version' from command line, or open Firefox and go to Help > About Firefox. On macOS, run '/Applications/Firefox.app/Contents/MacOS/firefox --version'.
    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. Determine Thunderbird version
    Run 'thunderbird --version' from command line, or open Thunderbird and go to Help > About Thunderbird. On macOS, run '/Applications/Thunderbird.app/Contents/MacOS/thunderbird --version'.
    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
  4. Determine Thunderbird ESR version
    Run 'thunderbird --version' and note if it is an ESR release. ESR versions typically show '10.0' series with extended support.
    Affected if Version is 10.0, 10.0.1, 10.0.2, 10.0.3, or 10.0.4 (ESR editions)
  5. Determine SeaMonkey version
    Run 'seamonkey --version' from command line, or open SeaMonkey and go to Help > About SeaMonkey.
    Affected if Version is 2.9 or lower, or exactly 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 the installed Firefox, Thunderbird, Thunderbird ESR, or SeaMonkey version matches any of the specific versions listed in the affected products and versions for CVE-2012-0469.

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 affected Mozilla products (Firefox, Firefox ESR, Thunderbird, Thunderbird ESR, SeaMonkey) to the patched versions that address this vulnerability.

Recommended fix High confidence

Firefox 12.0+, Thunderbird 12.0+, Thunderbird ESR 10.0.4+, SeaMonkey 2.9+

  1. 1. Back up all critical user data and browser profiles before performing the upgrade
  2. 2. For Firefox: Download and install Firefox 12.0 or later from the official Mozilla website (mozilla.org)
  3. 3. For Thunderbird: Download and install Thunderbird 12.0 or later from the official Mozilla website
  4. 4. For Thunderbird ESR: Ensure version 10.0.4 or later is installed, or upgrade to the latest ESR release
  5. 5. For SeaMonkey: Upgrade to SeaMonkey 2.9 or later from the SeaMonkey project website
  6. 6. After upgrade, verify the installed version matches the fixed release by checking Help > About
Caveat Minimal risk; major version upgrades may introduce minor UI changes but typically preserve user data and settings

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

Fix this in Firefox Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing2.0 h
  • Review / QA1.0 h
7.0 hours of engineering $1,240
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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-2012-0469 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