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FirefoxWeb browser · Mozilla

CVE-2016-2812

HIGH · 7.5 CVSS v3.0 Published 2016-04-30
Fix available
A fix is available. Upgrade to after 45.0.2 or later.
See remediation →
82/100
Remediation priority · High
Remotely reachable No privileges

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
Race condition in the get implementation in the ServiceWorkerManager class in the Service Worker subsystem in Mozilla Firefox before 46.0 allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow and application crash) via a crafted web site.

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

Race condition in the get implementation of ServiceWorkerManager in Firefox's Service Worker subsystem before version 46.0 allows a crafted website to trigger a buffer overflow, potentially enabling arbitrary code execution or denial of service via application crash.

MitigationUpgrade Mozilla Firefox to version 46.0 or later to remediate this vulnerability. No practical workarounds exist for this client-side browser flaw.

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:<= 45.0.2

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
High
Privileges
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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. Locate Firefox installation
    Open Firefox, click the menu button (three horizontal lines), select Help, then select About Firefox. Alternatively, navigate to about:support in the address bar.
    Affected if Firefox is installed on the system
  2. Identify installed Firefox version
    In the About Firefox window, locate the version number displayed next to the Firefox logo. This shows the full version string (e.g., 45.0.2, 45.1.0, 46.0).
    Affected if The version shown is 45.0.2 or any version below 46.0
  3. Confirm affected version range
    Compare your installed version number against the affected range: any version <= 45.0.2 is vulnerable. Versions 45.1, 45.2, and any 45.x release below 45.0.2 are also affected.
    Affected if The installed version is 45.0.2 or lower, or any 45.x version prior to 46.0

A user is affected if Mozilla Firefox version 45.0.2 or any version below 46.0 is installed and the Service Worker feature is enabled in the browser settings.

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.

From vendor data
Upgrade available Upgrade to a release after 45.0.2
Interim mitigation

Upgrade Mozilla Firefox to version 46.0 or later to remediate this vulnerability. No practical workarounds exist for this client-side browser flaw.

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
Get the upgrade done

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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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-2016-2812 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