CVE-2009-1138

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.

• CWE-399

• http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=804
• http://osvdb.org/54937
• http://secunia.com/advisories/35355Vendor Advisory
• http://support.avaya.com/elmodocs2/security/ASA-2009-214.htm
• http://www.securityfocus.com/bid/35226Patch
• http://www.securitytracker.com/id?1022349
• http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlUS Government Resource
• http://www.vupen.com/english/advisories/2009/1537Patch, Vendor Advisory
• 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
• http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=804
• http://osvdb.org/54937
• http://secunia.com/advisories/35355Vendor Advisory
• http://support.avaya.com/elmodocs2/security/ASA-2009-214.htm
• http://www.securityfocus.com/bid/35226Patch
• http://www.securitytracker.com/id?1022349
• http://www.us-cert.gov/cas/techalerts/TA09-160A.htmlUS Government Resource
• http://www.vupen.com/english/advisories/2009/1537Patch, Vendor Advisory
• 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

Published

Jun 10, 2009

Last Modified

Jun 16, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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