CVE-2012-0960
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 · uneditedUnity integration extension (unity-firefox-extension) before 2.4.1 for Firefox does not properly handle callbacks, which allows remote attackers to cause a denial of service (Firefox crash) and possibly execute arbitrary code via a crafted request.
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 confidenceThe Unity Firefox extension (unity-firefox-extension) before version 2.4.1 contains a callback handling flaw that can be exploited via crafted requests from remote websites. This improper handling can cause Firefox to crash (denial of service) and potentially allow arbitrary code execution.
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<= 2.4.0= 0.02= 0.2.1= 0.3= 0.3.1= 2.1= 2.2= 2.3= 2.3.1= 2.3.2= 2.3.3= 2.3.4CVSS 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
- Low
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:L/Au:N/C:P/I:P/A:P
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 checksWork through these to decide whether this CVE applies to you.
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Verify Unity Firefox extension is installedOpen Firefox and navigate to Add-ons > Extensions, or enter 'about:addons' in the address bar. Look for 'Unity' or 'unity-firefox-extension' in the list of installed extensions.Affected if The Unity Firefox extension appears in the list of installed extensions.
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Determine the installed version numberIn the Firefox Add-ons Manager (about:addons), click on the Unity extension entry and view the version number displayed in the details panel. Alternatively, locate the extension folder in the Firefox profile directory (typically in ~/.mozilla/firefox/*/extensions/ or %AppData%/Mozilla/Firefox/Profiles/*/extensions/) and check the install.rdf or manifest.json file for the version attribute.Affected if The version number matches any of the following: 0.02, 0.2.1, 0.3, 0.3.1, 2.1, 2.2, 2.3, 2.3.1, 2.3.2, 2.3.3, 2.3.4, or any version 2.4.0 or lower.
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Confirm the extension is enabledIn the Firefox Add-ons Manager, verify that the Unity extension shows a status of 'Enabled' rather than 'Disabled'.Affected if The extension is enabled and the version is in the affected list.
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Check if JavaScript is enabled for websitesIn Firefox, go to Settings > Privacy & Security > Permissions, or enter 'about:preferences#privacy' and verify the JavaScript permission settings. The vulnerability is triggered via crafted requests from remote websites.Affected if JavaScript is allowed to run on websites (default setting), which enables the attack vector for this vulnerability.
You are affected if the Unity Firefox extension is installed, enabled, and its version is 2.4.0 or lower, or matches any of the specific vulnerable version numbers listed.
Generated from the published advisory. Verify against your own configuration.
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 dataUpgrade unity-firefox-extension to version 2.4.1 or later to patch the callback handling vulnerability. Users should avoid visiting untrusted websites until the patch is applied.
- Consultation2.0 h
- Implementation4.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-0960 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2012-0960 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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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