CVE-2009-1123

Microsoft Windows Improper Input Validation

7.8 HIGHActively exploited (CISA KEV)EPSS 4.88%

Published10 Jun 2009
Added to CISA KEV3 Mar 2022
Remediation due24 Mar 2022

Description

The kernel in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 SP2 does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application, aka "Windows Kernel Desktop Vulnerability."

CVSS 3.1 breakdown

Attack vectorLocal

Attack complexityLow

Privileges requiredNone

User interactionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Microsoft Windows 2000all versions

Microsoft Windows Server 2003all versions

Microsoft Windows Server 2008all versions

Microsoft Windows Vistaall versions

Microsoft Windows Xpall versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Patch & vendor advisories

https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-025

References

http://osvdb.org/54940Broken Link
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-025PatchVendor Advisory
http://secunia.com/advisories/35372Broken Link
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6206Broken Link
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-1123US Government Resource
http://www.securitytracker.com/id?1022359Broken LinkThird Party AdvisoryVDB Entry
http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlBroken LinkThird Party AdvisoryUS Government Resource
http://www.vupen.com/english/advisories/2009/1544Broken Link

Frequently asked

Is CVE-2009-1123 being actively exploited?

Yes. CVE-2009-1123 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Mar 2022.

How severe is CVE-2009-1123?

CVE-2009-1123 has a CVSS 3.1 base score of 7.8, rated high. EPSS estimates a 4.88% probability of exploitation.

Which products are affected by CVE-2009-1123?

Affected products include Microsoft Windows 2000, Microsoft Windows Server 2003, Microsoft Windows Server 2008, Microsoft Windows Vista, Microsoft Windows Xp.

How do I fix CVE-2009-1123?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2009-1123 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.