CVE-2012-2967
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 · uneditedCaucho Quercus, as distributed in Resin before 4.0.29, does not properly implement the == (equals sign equals sign) operator for comparisons, which has unspecified impact and context-dependent attack 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 · moderate confidenceThe vulnerability exists in Caucho Quercus, a PHP engine implementation bundled with Resin server versions prior to 4.0.29. The == comparison operator fails to function correctly within this PHP runtime, creating potential authentication bypass or type-confusion vulnerabilities depending on how comparisons are used in deployed PHP applications.
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<= 4.0.28= 2.0.0= 2.0.1= 2.0.2= 2.0.3= 2.0.4= 2.0.5= 2.1.0= 2.1.1= 2.1.2= 2.1.3= 2.1.4CVSS 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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Identify if Resin server is installedLook for Resin processes running on the system, or check common installation directories such as /usr/local/resin, /opt/resin, or the application server directory. Search for files named 'resin.conf' or directories containing 'resin' in the name.Affected if Resin server is found running or installed on the system
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Determine the Resin versionCheck the Resin version by viewing the 'resin-version.txt' file in the Resin installation root directory, or run 'java -jar resin.jar -version' if the resin.jar file is available. Also check any version.properties or pom.xml files in the Resin installation.Affected if The installed version is 4.0.28 or earlier, OR the version is 2.0.0 through 2.1.4 inclusive
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Confirm Quercus PHP engine is in useVerify that PHP applications are being served through Resin by checking the resin.conf configuration file for PHP servlet mappings, or by attempting to access a simple .php file on the server to see if it is processed by Quercus.Affected if PHP files are being processed by Resin's Quercus engine rather than a standard PHP interpreter such as PHP-FPM or mod_php
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Identify security-critical == comparisons in deployed PHP codeReview deployed PHP applications for authentication logic, privilege checks, or other security controls that rely on the == operator for comparisons. Search for patterns such as 'if ($_POST['password'] == ...' or similar type-sensitive comparisons used in login or authorization code.Affected if PHP applications deployed on Resin use == comparisons for authentication, authorization, or other security decisions where type confusion could lead to bypass
A user is affected if they are running Resin server versions 4.0.28 or earlier (or versions 2.0.0-2.1.4) with Quercus enabled and have PHP applications that rely on == operator for security-critical comparisons.
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 Resin to version 4.0.29 or later to obtain the corrected Quercus PHP engine implementation.
- Consultation4.0 h
- Implementation6.0 h
- Testing6.0 h
- Review / QA3.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,312.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-2967 — 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-2012-2967 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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