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JetApplication · Microsoft

CVE-2002-0859

HIGH · 7.5 CVSS v2.0 Published 2002-09-05
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

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 · unedited
Buffer overflow in the OpenDataSource function of the Jet engine on Microsoft SQL Server 2000 allows remote attackers to execute arbitrary code.

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 confidence

Buffer overflow vulnerability in the OpenDataSource function of the Jet database engine in Microsoft SQL Server 2000 allows remote attackers to execute arbitrary code via specially crafted input to the function.

MitigationApply Microsoft security patches for SQL Server 2000 or migrate to a supported SQL Server version as SQL Server 2000 is end-of-life and no longer receives security updates.

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
JetApplication
Affected:= 4.0
Sql ServerApplication
Affected:= 2000

CVSS 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 checks

Work through these to decide whether this CVE applies to you.

  1. Identify SQL Server version
    Check the SQL Server version by running 'SELECT @@VERSION' in SQL Query Analyzer or checking the SQL Server service version through Services.msc
    Affected if The version shows Microsoft SQL Server 2000 (8.0.x)
  2. Confirm Jet OLE DB provider is installed
    Check for the presence of the Jet OLE DB provider (msjet40.dll) in the system32 folder or through SQL Server's registered providers
    Affected if The Jet OLE DB provider version 4.0 is installed on the system
  3. Verify OpenDataSource function is accessible
    Check SQL Server configuration for OLE DB provider settings or review SQL Server error logs for OpenDataSource-related entries
    Affected if The OpenDataSource function is enabled and accessible to database users or applications

You are affected if you are running SQL Server 2000 with the Jet 4.0 OLE DB provider and the OpenDataSource function is available to users or applications.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

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 data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply Microsoft security patches for SQL Server 2000 or migrate to a supported SQL Server version as SQL Server 2000 is end-of-life and no longer receives security updates.

Fix this in Jet Scoped from the published advisory
  • Consultation2.0 h
  • Implementation4.0 h
  • Testing4.0 h
  • Review / QA2.0 h
12.0 hours of engineering $2,080
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,328.

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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 sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2002-0859 in production — separate from our analysis above.

No notes yet

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What this is

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.

What belongs here
  • 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