CVE-2002-1295
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 · uneditedThe Microsoft Java implementation, as used in Internet Explorer, allows remote attackers to cause a denial of service (crash) and possibly conduct other unauthorized activities via applet tags in HTML that bypass Java class restrictions (such as private constructors) by providing the class name in the code parameter, aka "Incomplete Java Object Instantiation Vulnerability."
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 an incomplete Java object instantiation vulnerability in the Microsoft Java Virtual Machine used in Internet Explorer. Attackers can bypass Java class restrictions (such as private constructors) by specifying restricted class names directly in the applet tag's code parameter, allowing instantiation of classes that should be inaccessible. This enables denial of service (crash) and potentially other unauthorized activities.
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= 1.1CVSS 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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Check for msjava.dll presenceSearch the filesystem for msjava.dll, typically found in Windows\System32 or Windows\System directories. Also check for javai.dll which is the Microsoft Java VM interpreter.Affected if Either file exists on the system, indicating Microsoft Java VM is installed.
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Verify Microsoft Java VM registry entryInspect the Windows registry under HKLM\SOFTWARE\Microsoft\Java VM for the "Version" value. Also check HKLM\SOFTWARE\Microsoft\JDK for the installed Java components.Affected if Registry entries exist showing Microsoft Java VM version 1.1.x is installed.
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Confirm Internet Explorer Java plugin configurationOpen Internet Explorer, go to Tools > Internet Options > Security > Custom Level. Look for settings related to 'Java permissions' or 'ActiveX controls and plugins' that control Java applet execution.Affected if Java is enabled in Internet Explorer security settings, allowing applets to run.
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Check for deprecated Microsoft Java VM componentsLook for other Microsoft Java VM files including jview.exe,wjview.exe in System32, or check Add/Remove Programs for 'Microsoft Java Virtual Machine' entry.Affected if Additional Microsoft Java VM executables or components are present on the system.
A system is affected if Microsoft Java Virtual Machine version 1.1 is installed and Java is enabled in Internet Explorer, allowing potentially malicious applets to bypass class restrictions.
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 dataDisable Java in Internet Explorer or remove the deprecated Microsoft Java VM from affected systems. This vulnerability affects a discontinued product (Microsoft Java VM) that is no longer supported; modern browsers and systems should not have this component installed.
- Consultation1.0 h
- Implementation1.0 h
- Testing1.0 h
- Review / QA1.0 h
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Free · runs locallyCheck whether your project pulls in CVE-2002-1295 — 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-2002-1295 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
- No spam, self-promotion, credentials, or personal data