CVE-2009-1138
HIGHEPSS 98th pctlDescription
The LDAP service in Active Directory on Microsoft Windows 2000 SP4 does not properly free memory for LDAP and LDAPS requests, which allows remote attackers to execute arbitrary code via a request that uses hexadecimal encoding, whose associated memory is not released, related to a "DN AttributeValue," aka "Active Directory Invalid Free Vulnerability." NOTE: this issue is probably a memory leak.
CVSS v2 Vector
No CVSS vector data available.
Exploit Intelligence
Very high risk: more likely to be exploited than 98% of all known CVEs.
References
- http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=804
- http://osvdb.org/54937
- http://secunia.com/advisories/35355
- http://support.avaya.com/elmodocs2/security/ASA-2009-214.htm
- http://www.securityfocus.com/bid/35226
- http://www.securitytracker.com/id?1022349
- http://www.us-cert.gov/cas/techalerts/TA09-160A.html
- http://www.vupen.com/english/advisories/2009/1537
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-018
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6180
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Start freeThis product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.