CVE-2012-1242
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 · uneditedUntrusted search path vulnerability in JustSystems Ichitaro 2011 Sou, Ichitaro 2006 through 2011, Ichitaro Government 2006 through 2010, Ichitaro Portable with oreplug, Ichitaro Viewer, JUST School, JUST School 2009 and 2010, JUST Jump 4, JUST Frontier, and oreplug allows local users to gain privileges via a Trojan horse DLL in the current working directory.
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 confidenceThis is a DLL hijacking (untrusted search path) vulnerability in JustSystems Ichitaro and related software. The application loads dynamic link libraries from the current working directory without validating the full path, allowing a local attacker to place a malicious DLL with the same name to achieve code execution with the application's privileges.
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= 2006= 2007= 2008= 2009= 2010= 2011all versionsall versionsall versions= 4all versions= 2009= 2010all versionsCVSS 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
- Local
- Complexity
- M
- Authentication
- None
- Confidentiality
- Complete
- Integrity
- Complete
- Availability
- Complete
AV:L/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.
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Identify installed JustSystems softwareCheck programs installed on the system for JustSystems Ichitaro, Just Frontier, Just Jump, Just School, Oreplug, or Ichitaro Viewer using Add/Remove Programs or system inventory toolsAffected if Any of the listed JustSystems products are installed
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Verify product version against affected rangesFor Ichitaro, compare installed version to 2006, 2007, 2008, 2009, 2010, or 2011. For Just Jump, check if version 4. For Just School, check if version 2009 or 2010. For Portable With Oreplug, Viewer, Just Frontier, or Oreplug, all versions are affectedAffected if The installed product and version match any entry in the affected products list
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Determine typical launch directoryNote the directory from which the user typically launches the JustSystems application. Check if this is a directory where untrusted users could write files (such as shared folders, downloads, or user-writable directories)Affected if The application can be launched from or runs in directories writable by untrusted users
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Test for untrusted DLL loadingPlace a test DLL with a commonly loaded name (such as secur32.dll, wsock32.dll, or version.dll) in the application's working directory and observe if the application attempts to load it instead of the system DLLAffected if The application loads DLLs from the current working directory without validating the full path
The user is affected if any JustSystems product from the affected list is installed and can be launched from or runs in a directory where untrusted users can place malicious DLLs.
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 vendor patches if available; otherwise, ensure the application is launched from trusted directories and consider removing write permissions from directories where the application runs to prevent placement of malicious DLLs.
- Consultation2.0 h
- Implementation8.0 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-2012-1242 — 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-2012-1242 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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