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FirefoxWeb browser · Mozilla

CVE-2010-3778

HIGH · 9.3 CVSS v2.0 Published 2010-12-10
Fix available
A fix is available. Upgrade to after 3.0.10 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
Unspecified vulnerability in Mozilla Firefox 3.5.x before 3.5.16, Thunderbird before 3.0.11, and SeaMonkey before 2.0.11 allows 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 vulnerability in Mozilla Firefox 3.5.x before 3.5.16, Thunderbird before 3.0.11, and SeaMonkey before 2.0.11 allows remote attackers to cause denial of service via application crash or potentially execute arbitrary code through unknown attack vectors.

MitigationUpgrade affected applications to Firefox 3.5.16+, Thunderbird 3.0.11+, or SeaMonkey 2.0.11+ respectively, or migrate to newer supported versions of these products.

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= 3.5.1= 3.5.2= 3.5.3= 3.5.4= 3.5.5= 3.5.6= 3.5.7= 3.5.8= 3.5.9= 3.5.10= 3.5.11
ThunderbirdApplication
Affected:<= 3.0.10= 0.1= 0.2= 0.3= 0.4= 0.5= 0.6= 0.7= 0.7.1= 0.7.2= 0.7.3= 0.8
SeamonkeyApplication
Affected:all versions<= 2.0.10= 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

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 the application name and version - look for Firefox, Thunderbird, or SeaMonkey in installed programs or by launching the application and checking Help > About
    Affected if The product is Firefox 3.5.x, Thunderbird any version up to 3.0.10, or SeaMonkey any version up to 2.0.10
  2. Determine Firefox version
    For Firefox: open browser, go to Help > About Firefox. The version will display as 'Firefox 3.5.x'
    Affected if Version shows 3.5.0 through 3.5.15 (any 3.5.x version before 3.5.16)
  3. Determine Thunderbird version
    For Thunderbird: open application, go to Help > About Thunderbird. The version will display as 'Thunderbird x.x.x'
    Affected if Version shows any version from 0.1 through 3.0.10, or any 3.0.x version before 3.0.11
  4. Determine SeaMonkey version
    For SeaMonkey: open application, go to Help > About SeaMonkey. The version will display as 'SeaMonkey x.x.x'
    Affected if Version shows any 1.x version or any 2.0.x version before 2.0.11
  5. Confirm vulnerability trigger condition
    This is a memory corruption flaw triggered by unknown attack vectors from remote content - any processing of malicious web content or email content could trigger it
    Affected if The affected application version is running and processing untrusted web or email content

You are affected if you are running Firefox 3.5.x before 3.5.16, Thunderbird 3.0.10 or earlier, or SeaMonkey 2.0.10 or earlier - upgrade to the fixed versions to remediate.

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 3.0.10
Interim mitigation

Upgrade affected applications to Firefox 3.5.16+, Thunderbird 3.0.11+, or SeaMonkey 2.0.11+ respectively, or migrate to newer supported versions of these products.

Recommended fix High confidence

Firefox 3.5.16, Thunderbird 3.0.11, or SeaMonkey 2.0.11

  1. 1. Check current browser version by navigating to Help > About (Firefox/Thunderbird) or Help > About SeaMonkey
  2. 2. For Firefox 3.5.x: Download Firefox 3.5.16 from mozilla.org or your system's software repository
  3. 3. For Thunderbird: Download Thunderbird 3.0.11 from mozilla.org or your system's software repository
  4. 4. For SeaMonkey: Download SeaMonkey 2.0.11 from mozilla.org or your system's software repository
  5. 5. Close all instances of the affected application
  6. 6. Install the updated version, ensuring to back up existing profiles if desired
  7. 7. Restart the application and verify the version in About
Caveat These are end-of-life legacy versions from 2010; consider migrating to a supported modern browser version for continued security updates

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
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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-2010-3778 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