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CVE-2009-1123: Microsoft Windows Improper Input Validation Vulnerability

criticalknown exploitedCVE-2009-1123
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
The kernel in Microsoft Windows does not properly validate changes to unspecified kernel objects, which allows local users to gain privileges via a crafted application.

CSIRTS triage

vendor: Microsoftproduct: WindowsPrivilege escalation
What
The kernel in Microsoft Windows does not properly validate changes to unspecified kernel objects, allowing local users to gain privileges.
Who is affected
Local users of affected Microsoft Windows versions are at risk.
Urgency
Immediate remediation is necessary as the vulnerability is critical and actively exploited.
Action
Install the latest security updates from Microsoft.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-03-03
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2009-1123

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2009-1123coverage & exploitation statusNVD · CVE.org

Recent advisories for Microsoft Windows Improper

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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