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FirefoxWeb browser · Mozilla

CVE-2010-1211

HIGH · 9.3 CVSS v2.0 Published 2010-07-30
Fix available
A fix is available. Upgrade to after 2.0.5 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 3.5.x before 3.5.11 and 3.6.x before 3.6.7, Thunderbird 3.0.x before 3.0.6 and 3.1.x before 3.1.1, and SeaMonkey before 2.0.6 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

Memory corruption vulnerabilities in the Mozilla browser engine (Gecko) allow remote attackers to cause denial of service (application crash) or potentially execute arbitrary code via unknown vectors. The vulnerabilities affect Firefox 3.5.x before 3.5.11, Firefox 3.6.x before 3.6.7, Thunderbird 3.0.x before 3.0.6, Thunderbird 3.1.x before 3.1.1, and SeaMonkey before 2.0.6.

MitigationUpdate affected Mozilla products to the patched versions (Firefox 3.5.11/3.6.7+, Thunderbird 3.0.6/3.1.1+, SeaMonkey 2.0.6+) or later to remediate the memory corruption vulnerabilities.

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:= 3.5.1= 3.5.2= 3.5.3= 3.5.4= 3.5.5= 3.5.6= 3.5.7= 3.5.9= 3.5.10= 3.6.1= 3.6.2= 3.6.3
ThunderbirdApplication
Affected:= 3.0= 3.0.1= 3.0.2= 3.0.3= 3.0.4= 3.0.5= 3.1
SeamonkeyApplication
Affected:<= 2.0.5= 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 Windows, look in Program Files for Mozilla Firefox, Mozilla Thunderbird, or SeaMonkey. On Linux, check package manager or look in /usr/lib/firefox, /usr/lib/thunderbird, or /usr/lib/seamonkey. On macOS, check /Applications for Firefox, Thunderbird, or SeaMonkey.
    Affected if Any of the three affected products (Firefox, Thunderbird, or SeaMonkey) is installed
  2. Determine Firefox version
    For Firefox: Click Help > About Firefox, or run 'firefox -v' from command line, or check the version file in the application directory
    Affected if Version is 3.5.1 through 3.5.10 (any 3.5.x before 3.5.11), or 3.6.1 through 3.6.6 (any 3.6.x before 3.6.7)
  3. Determine Thunderbird version
    For Thunderbird: Click Help > About Thunderbird, or run 'thunderbird -v' from command line, or check the version file in the application directory
    Affected if Version is 3.0 through 3.0.5 (any 3.0.x before 3.0.6), or 3.1 (any 3.1.x before 3.1.1)
  4. Determine SeaMonkey version
    For SeaMonkey: Click Help > About SeaMonkey, or run 'seamonkey -v' from command line, or check the version file in the application directory
    Affected if Version is 2.0.5 or lower, or any 1.x version (1.0 through 1.1)

User is affected if Firefox version is 3.5.x before 3.5.11 or 3.6.x before 3.6.7, Thunderbird version is 3.0.x before 3.0.6 or 3.1.x before 3.1.1, or SeaMonkey version is 2.0.5 or lower or any 1.x version.

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 2.0.5
Interim mitigation

Update affected Mozilla products to the patched versions (Firefox 3.5.11/3.6.7+, Thunderbird 3.0.6/3.1.1+, SeaMonkey 2.0.6+) or later to remediate the memory corruption vulnerabilities.

Recommended fix High confidence

Firefox 3.5.11 or later (3.6.7+ recommended); Thunderbird 3.0.6 or later (3.1.1+ recommended); SeaMonkey 2.0.6 or later

  1. 1. Back up all personal data, bookmarks, and passwords from the current Firefox/Thunderbird/SeaMonkey installation
  2. 2. Visit the official Mozilla Firefox download page at www.mozilla.org to download the latest version
  3. 3. For Thunderbird, download the latest version from the official Mozilla Thunderbird page
  4. 4. For SeaMonkey, download version 2.0.6 or later from the official Mozilla SeaMonkey page
  5. 5. Close all instances of the affected application
  6. 6. Run the installer for the new version
  7. 7. Restart the application and verify it launches successfully
  8. 8. Reconfigure any disabled JavaScript settings or add-ons as needed after the upgrade
Caveat Legacy extensions or add-ons incompatible with newer versions may need to be updated or replaced; custom configuration changes may need to be reapplied

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

Fix this in Firefox Scoped from the published advisory
  • Consultation2.0 h
  • Implementation3.0 h
  • Testing2.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,420
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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-2010-1211 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