What’s Vulnerable › Vulnerabilities

CVE-2009-2523

• Severity: critical (CVSS 10.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 26.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-11-11 · updated 2026-06-16
• Weakness: CWE-125

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 products

• Microsoft Windows 2000: all versions

References

• 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
• 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

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