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FirefoxWeb browser · Mozilla

CVE-2009-3982

HIGH · 9.3 CVSS v2.0 Published 2009-12-17
Fix available
A fix is available. Upgrade to after 2.0 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click Patch available

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 JavaScript engine in Mozilla Firefox 3.5.x before 3.5.6, SeaMonkey before 2.0.1, and Thunderbird 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

A detailed technical summary for this CVE is being prepared.

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:= 3.5.1= 3.5.2= 3.5.3= 3.5.4= 3.5.5
SeamonkeyApplication
Affected:<= 2.0= 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= 1.0.99
ThunderbirdApplication
Affected:all versions

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

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 2.0
Vendor patch www.mozilla.org →
Recommended fix High confidence

Firefox 3.5.6, SeaMonkey 2.0.1, Thunderbird 3.0 (or latest stable releases of each)

  1. 1. For Firefox users: Upgrade to Firefox 3.5.6 or later (preferably upgrade to the latest stable Firefox release for full security coverage
  2. 2. For SeaMonkey users: Upgrade to SeaMonkey 2.0.1 or later (preferably upgrade to the latest stable SeaMonkey release
  3. 3. For Thunderbird users: Upgrade to Thunderbird 3.0 or later (preferably upgrade to the latest stable Thunderbird release
  4. 4. After upgrading, verify the JavaScript engine functions correctly in the updated version
  5. 5. Test that existing web applications and extensions work with the new version
Caveat These are major version upgrades from 2009-2010 era software; some legacy extensions and older web applications may not be compatible with modern versions

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

We can identify the exact fixed release, upgrade, and verify it in staging — typical engagement from $1,950. Get the upgrade done

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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-2009-3982 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