CVE-2012-4858
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 · uneditedIBM Cognos Business Intelligence (BI) 8.4.1 before IF1, 10.1 before IF2, 10.1.1 before IF2, and 10.2 before IF1 does not properly validate Java serialized input, which allows remote attackers to execute arbitrary commands via unspecified 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 confidenceJava deserialization vulnerability in IBM Cognos Business Intelligence that allows remote attackers to execute arbitrary commands via specially crafted Java serialized objects due to improper validation of serialized input.
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= 8.4.1= 10.1= 10.1.1= 10.2CVSS 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 checksWork through these to decide whether this CVE applies to you.
-
Identify installed Cognos BI versionCheck the version of IBM Cognos Business Intelligence installed in your environment. This is typically visible in the Cognos Configuration tool, or in the installation logs, or by checking the Cognos installation directory for a version file.Affected if The installed version matches 8.4.1, 10.1, 10.1.1, or 10.2 exactly.
-
Locate Cognos BI services and portsIdentify which Cognos services are running and listening for connections. Check the Cognos Configuration for enabled dispatcher ports, typically on ports 9300, 80, 443, or custom ports configured during installation.Affected if Any Cognos BI web or dispatcher services are running and accepting connections.
-
Verify Java servlet or SOAP endpoints are exposedInspect the Cognos configuration for exposed servlet or SOAP endpoints that process serialized Java objects. These are typically accessed via URLs under /cognos8/servlet or /p2p/servlet paths.Affected if Servlet or SOAP endpoints that handle Java serialization are accessible over the network.
-
Check network accessibility of Cognos servicesDetermine if Cognos BI services are reachable from network segments outside the trusted internal network. Use netstat, firewall rules, or network scanning to identify exposed listening ports.Affected if Cognos services are accessible from untrusted network segments or the internet.
-
Review Cognos log files for deserialization activityExamine Cognos BI logs (located in the logs subdirectory of the installation) for any suspicious serialized object traffic or unexpected Java class loading patterns.Affected if Logs show unexpected serialized object requests or evidence of exploitation attempts.
You are affected if your installed IBM Cognos Business Intelligence version is exactly 8.4.1, 10.1, 10.1.1, or 10.2, and the Java servlet or SOAP endpoints that handle serialized objects are network-accessible.
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 dataApply the relevant interim fixes (IF1 for versions 8.4.1 and 10.2, IF2 for 10.1 and 10.1.1) to properly validate Java serialized input, and restrict network access to Cognos services until patched.
- Consultation4.0 h
- Implementation8.0 h
- Testing8.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,656.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2012-4858 — 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-2012-4858 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
Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.
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.
- 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