dbcve.org
Database ServerDatabase / datastore · Oracle

CVE-2009-1020

HIGH · 9.0 CVSS v2.0 Published 2009-07-14
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
96/100
Remediation priority · Urgent
Remotely reachable 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
Unspecified vulnerability in the Network Foundation component in Oracle Database 9.2.0.8, 9.2.0.8DV, 10.1.0.5, 10.2.0.4, and 11.1.0.7 allows remote authenticated users to affect confidentiality, integrity, and availability via unknown 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 confidence

Unspecified vulnerability in Oracle Database's Network Foundation component affecting versions 9.2.0.8 through 11.1.0.7. The flaw allows remote authenticated users to impact confidentiality, integrity, and availability through unknown vectors in the database networking layer.

MitigationApply the relevant Oracle Critical Patch Update (CPU) for April 2009 or later that addresses CVE-2009-1020. For systems that cannot be patched, restrict network access to the database and enforce strict authentication controls.

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
Database ServerDatabase / datastore
Affected:= 9.2.0.8= 9.2.0.8dv= 10.1.0.5= 10.2.0.4= 11.1.0.7

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
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:N/AC:L/Au:S/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 checks

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

  1. Determine installed Oracle Database version
    Connect to the database as a privileged user and run: SELECT version FROM v$instance; or check the ORACLE_HOME/oratab file
    Affected if version matches 9.2.0.8, 9.2.0.8dv, 10.1.0.5, 10.2.0.4, or 11.1.0.7
  2. Verify Oracle Net Listener is operational
    Check listener status with command: lsnrctl status LISTENER (or check if process tnslsnr is running)
    Affected if listener is running and accepting remote connections on network ports (typically 1521)
  3. Assess network exposure of the database
    Review SQLNET.ORA file in $ORACLE_HOME/network/admin for the SQLNET.INBOUND_CONNECT_TIMEOUT parameter and check firewall rules or listener.ora for HOST binding
    Affected if listener is bound to 0.0.0.0 or accessible from untrusted networks without firewall restrictions
  4. Confirm remote authentication is enabled
    Check sqlnet.ora for SQLNET.AUTHENTICATION_SERVICES parameter and verify database user accounts exist that can authenticate remotely
    Affected if authentication is configured to allow remote connections (not set to NONE) and remote user accounts are active

Environment is affected if the Oracle Database version is one of the listed affected versions AND the Network Listener is exposed to remote network access with authenticated user capabilities.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Apply the relevant Oracle Critical Patch Update (CPU) for April 2009 or later that addresses CVE-2009-1020. For systems that cannot be patched, restrict network access to the database and enforce strict authentication controls.

Recommended fix Moderate confidence

Oracle Critical Patch Update April 2009 or later (or upgrade to a currently supported Oracle Database version such as 11.2.0.x, 12c, or higher)

  1. 1. Navigate to Oracle Support and download the Oracle Critical Patch Update (CPU) for April 2009 or later, which addresses CVE-2009-1020
  2. 2. Review the Oracle CPU advisory for Network Foundation component patches specific to your Oracle Database version
  3. 3. Apply the appropriate patch to each affected database server instance
  4. 4. Restart the Oracle Database services as required by the patch installation
  5. 5. Verify the patch was applied successfully by checking the Oracle inventory and testing database connectivity
Caveat Older patchsets may have compatibility issues with custom PL/SQL or applications; test thoroughly in non-production first

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Database Server Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing12.0 h
  • Review / QA4.0 h
28.0 hours of engineering $4,760
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Scan for this in your stack

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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-2009-1020 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
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  • Version or environment caveats, and links to real fixes
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