Title: Microsoft Windows DNS Server WPAD Access Validation Vulnerability
Severity: HIGH
Description:
The Microsoft Windows DNS Server is prone to an access-validation vulnerability because the software fails to restrict access to sensitive functions.
This issue is related to the handling of WPAD (Web Proxy Autodiscovery Protocol) entries. WPAD is a method for browsers to discover files used to automatically configure proxy servers.
Specifically, the DNS server fails to properly validate users attempting to register WPAD entries. By default, vulnerable DNS servers allow any authenticated user to register a WPAD entry if one is not already defined.
An authenticated attacker may exploit this issue to create a WPAD DNS entry. This may aid in man-in-the-middle and spoofing attacks. Other attacks are also possible.
Affected Products:
- Avaya DefinityOne Media Servers
- Avaya IP600 Media Servers
- 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
- Avaya S3400 Message Application Server
- Avaya S8100 Media Servers
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Server SP1
- Microsoft Windows 2000 Server SP2
- Microsoft Windows 2000 Server SP3
- Microsoft Windows 2000 Server SP4
- Microsoft Windows Server 2003 Datacenter Edition
- Microsoft Windows Server 2003 Datacenter Edition Itanium SP1
- Microsoft Windows Server 2003 Datacenter Edition SP1
- Microsoft Windows Server 2003 Datacenter x64 Edition
- Microsoft Windows Server 2003 Datacenter x64 Edition SP2
- Microsoft Windows Server 2003 Enterprise Edition
- Microsoft Windows Server 2003 Enterprise Edition Itanium SP1
- Microsoft Windows Server 2003 Enterprise Edition SP1
- Microsoft Windows Server 2003 Enterprise x64 Edition
- Microsoft Windows Server 2003 Enterprise x64 Edition SP2
- Microsoft Windows Server 2003 Itanium
- Microsoft Windows Server 2003 Itanium SP1
- Microsoft Windows Server 2003 Itanium SP2
- Microsoft Windows Server 2003 Standard Edition
- Microsoft Windows Server 2003 Standard Edition SP1
- Microsoft Windows Server 2003 Standard Edition SP2
- Microsoft Windows Server 2003 Standard x64 Edition
- Microsoft Windows Server 2003 Terminal Services
- Microsoft Windows Server 2003 Web Edition
- Microsoft Windows Server 2003 Web Edition SP1
- Microsoft Windows Server 2003 Web Edition SP2
- Microsoft Windows Server 2003 x64 SP1
- Microsoft Windows Server 2003 x64 SP2
References:
- Avaya: ASA-2009-083 MS09-008 Vulnerabilities in DNS and WINS Server
- Microsoft: MS09-008: DNS and WINS Server Security Update in More Detail
- Microsoft: Microsoft Homepage
- Microsoft: Microsoft Security Bulletin MS09-008
- nCircle: Successful Exploit Renders Microsoft Patch Ineffective
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