CVE-2009-2523

CRITICAL

10.0

CVSS Severity Score

EPSS Score0.1830%

EPSS Percentile26.40th

PublishedNov 11, 2009

Last ModifiedApr 23, 2026

Vulnerability Description

The License Logging Server (llssrv.exe) in Microsoft Windows 2000 SP4 allows remote attackers to execute arbitrary code via an RPC message containing a string without a null terminator, which triggers a heap-based buffer overflow in the LlsrLicenseRequestW method, aka "License Logging Server Heap Overflow Vulnerability."

Affected Platforms (CPE)

💻

Microsoft

Windows 2000

All versions

References & Advisories

🔗 http://www.us-cert.gov/cas/techalerts/TA09-314A.html

🔗 https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-064

🔗 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6300