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FirefoxWeb browser · Mozilla

CVE-2012-0442

HIGH · 9.3 CVSS v2.0 Published 2012-02-01
Fix available
A fix is available. Upgrade to 2.7 / 3.1.18 or later.
See remediation →
100/100
Remediation priority · Urgent
Public exploit 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 browser engine in Mozilla Firefox before 3.6.26 and 4.x through 9.0, Thunderbird before 3.1.18 and 5.0 through 9.0, and SeaMonkey before 2.7 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:< 3.6.26>= 4.0, < 10.0
Debian LinuxOperating system
Affected:= 5.0= 6.0
SeamonkeyApplication
Affected:< 2.7
ThunderbirdApplication
Affected:< 3.1.18>= 5.0, < 10.0
OpensuseOperating system
Affected:= 11.4
Linux Enterprise DesktopOperating system
Affected:= 10= 11
Linux Enterprise ServerOperating system
Affected:= 10= 11
Linux Enterprise Software Development KitOperating system
Affected:= 10= 11

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 2.7 / 3.1.18 / 3.6.26 or later
Fixed in 2.73.1.183.6.26
Vendor patch bugzilla.mozilla.org →
Recommended fix High confidence

Firefox 10.0+ / Thunderbird 10.0+ / SeaMonkey 2.7+ (or Firefox 3.6.26 / Thunderbird 3.1.18 for legacy branches)

  1. 1. Identify the installed Mozilla product (Firefox, Thunderbird, or SeaMonkey) and current version
  2. 2. For Firefox: upgrade to version 10.0 or later (or 3.6.26 if staying on the 3.6.x branch)
  3. 3. For Thunderbird: upgrade to version 10.0 or later (or 3.1.18 if staying on the 3.1.x branch)
  4. 4. For SeaMonkey: upgrade to version 2.7 or later
  5. 5. Verify the upgrade was successful by checking the application version (Help > About)
  6. 6. Restart the application completely
Caveat Users on enterprise/long-term support distributions may need to use distribution-specific package managers or enable backports; some legacy extensions may not be compatible with major version upgrades

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

We can perform the upgrade in your staging environment and verify nothing breaks — 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-2012-0442 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
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