Title: Microsoft Active Directory Encoded LDAP String Memory Corruption Remote Code Execution Vulnerability
Severity: CRITICAL
Description:
Microsoft Active Directory is an LDAP (Lightweight Directory Access Protocol) implementation distributed with multiple Windows operating systems.
Active Directory is prone to a remote code-execution vulnerability because the software fails to properly free memory when handling specially crafted LDAP or LDAPS requests. Specifically, this issue is triggered when the vulnerable application processes LDAP or LDAPS requests that include hexadecimal encoded DN (Distinguished Name) 'AttributeValue' strings.
Attackers can exploit this issue to execute arbitrary code in the context of the application. Successful exploits will completely compromise the affected computer. Failed attacks will cause denial-of-service conditions.
Affected Products:
- Avaya Messaging Application Server
- Avaya Messaging Application Server MM 1.1
- Avaya Messaging Application Server MM 2.0
- Avaya Messaging Application Server MM 3.0
- Avaya Messaging Application Server MM 3.1
- Microsoft Windows 2000 Advanced Server SP4
- Microsoft Windows 2000 Datacenter Server SP4
- Microsoft Windows 2000 Professional SP4
- Microsoft Windows 2000 Server SP4
References:
- Avaya: ASA-2009-214 MS09-018 Vulnerabilities in Active Directory
- Microsoft: Microsoft Homepage
- Microsoft: Microsoft Security Bulletin MS09-018 - Critical
- iDefense Labs: Microsoft Active Directory Hexdecimal DN AttributeValue Invalid Free Vulnerabili
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