CVE-2002-0050
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 · uneditedBuffer overflow in AuthFilter ISAPI filter on Microsoft Commerce Server 2000 allows remote attackers to execute arbitrary code via long authentication data.
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 confidenceBuffer overflow vulnerability in the AuthFilter ISAPI filter in Microsoft Commerce Server 2000 allows remote attackers to execute arbitrary code by sending specially crafted long authentication data to the filter.
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= 2000CVSS 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 if Microsoft Commerce Server 2000 is installedInspect the Windows registry key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Commerce Server for version 2000, or check for the installation directory typically at C:\Program Files\Microsoft Commerce ServerAffected if Commerce Server 2000 is found installed on the system
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Verify the AuthFilter ISAPI filter is loaded in IISCheck the IIS metabase or registry for ISAPI filter entries named 'AuthFilter' at HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W3SVC\Filters\Resource, or use IIS Manager to view ISAPI filters at the web server levelAffected if The AuthFilter ISAPI filter is registered and enabled in IIS
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Confirm the AuthFilter DLL file existsLocate the AuthFilter DLL (typically at C:\Program Files\Microsoft Commerce Server\AuthFilter.dll or within the Commerce Server bin directory)Affected if The AuthFilter.dll file is present on the server
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Verify IIS is running and accepting connectionsConfirm that IIS services are running and the Commerce Server web sites are active, as the vulnerability is triggered by sending malicious authentication data to the filterAffected if IIS is running and the Commerce Server sites are accessible over the network
The system is affected if Microsoft Commerce Server 2000 is installed with the AuthFilter ISAPI filter enabled in IIS, as the buffer overflow occurs in the AuthFilter when processing authentication requests.
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 dataSince Commerce Server 2000 is an obsolete product, the primary mitigation is to upgrade to a supported version or, if the system cannot be upgraded, disable the AuthFilter ISAPI filter if not essential to commerce operations.
- Consultation4.0 h
- Implementation8.0 h
- Testing4.0 h
- Review / QA2.0 h
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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-2002-0050 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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