Signature Detail

DNS: WPAD Registration Query

This signature detects attempts to register WPAD to the DNS server. This could indicate a possible "Man in the Middle" attack. An attacker could control the DNS server to forward users to a machine that they control.

Extended Description

The Microsoft Windows DNS Server is prone to an access-validation vulnerability because the software fails to properly restrict access when defining WPAD (Web Proxy Autodiscovery Protocol) entries. 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 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 messaging_application_server
• Microsoft windows_2000_server SP1
• Microsoft windows_2000_server SP2
• Microsoft windows_2000_server SP3
• Microsoft windows_2000_server SP4
• Microsoft windows_2000_server
• Microsoft windows_server_2003_datacenter_edition SP1
• Microsoft windows_server_2003_datacenter_edition
• Microsoft windows_server_2003_datacenter_edition_itanium SP1
• Microsoft windows_server_2003_datacenter_x64_edition SP2
• Microsoft windows_server_2003_datacenter_x64_edition
• Microsoft windows_server_2003_enterprise_edition SP1
• Microsoft windows_server_2003_enterprise_edition
• Microsoft windows_server_2003_enterprise_edition_itanium SP1
• Microsoft windows_server_2003_enterprise_x64_edition SP2
• Microsoft windows_server_2003_enterprise_x64_edition
• Microsoft windows_server_2003_itanium SP1
• Microsoft windows_server_2003_itanium SP2
• Microsoft windows_server_2003_itanium
• Microsoft windows_server_2003_standard_edition SP1
• Microsoft windows_server_2003_standard_edition SP2
• Microsoft windows_server_2003_standard_edition
• Microsoft windows_server_2003_standard_x64_edition
• Microsoft windows_server_2003_terminal_services
• Microsoft windows_server_2003_web_edition SP1
• Microsoft windows_server_2003_web_edition SP2
• Microsoft windows_server_2003_web_edition
• Microsoft windows_server_2003_x64 SP1
• Microsoft windows_server_2003_x64 SP2

References

• BugTraq: 33989
• CVE: CVE-2009-0093