CVE-2012-4937
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 · uneditedSession fixation vulnerability in the web interface in Pattern Insight 2.3 allows remote attackers to hijack web sessions via a jsession_id cookie.
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 confidenceSession fixation vulnerability in Pattern Insight 2.3 web interface allows remote attackers to hijack user sessions by manipulating the jsession_id cookie. The application accepts pre-defined session IDs rather than generating new ones upon authentication, enabling attackers to set a known session ID and intercept legitimate user sessions.
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= 2.3CVSS 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
- Partial
- Integrity
- Partial
- Availability
- Partial
AV:N/AC:M/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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Confirm Pattern Insight versionLocate the installed Pattern Insight version through the web interface header, about page, or check version files in the installation directory. Common paths include /opt/patterninsight or the application server logs.Affected if Version is exactly 2.3 (Pattern Insight 2.3)
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Identify jsession_id cookie usageAccess the Pattern Insight login page and examine browser developer tools or capture the HTTP response headers to check for a jsession_id cookie being set before authentication.Affected if A jsession_id cookie is present in the response before login or remains unchanged throughout the session lifecycle
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Test session fixation vulnerabilityManually set a known jsession_id value in the browser cookie, then authenticate with valid credentials. After successful login, inspect the jsession_id cookie to determine if it remained the same (vulnerable) or was regenerated (fixed).Affected if The jsession_id value remains identical before and after successful authentication, indicating session IDs are not being regenerated
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Verify session cookie security flagsInspect the Set-Cookie header for the jsession_id cookie and check for HttpOnly and Secure attributes in the HTTP response from the Pattern Insight server.Affected if The jsession_id cookie lacks HttpOnly and/or Secure flags, or these flags are not enforced by the server
A user is affected if running Pattern Insight version 2.3 where the jsession_id cookie persists unchanged through authentication and lacks proper security flags.
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 dataImplement session ID regeneration upon successful authentication and invalidate the previous session. Additionally, configure session cookies with HttpOnly and Secure flags, and enforce proper session timeout policies.
- Consultation3.0 h
- Implementation6.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-4937 — 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-2012-4937 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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