Microsoft ISA Server Web Proxy redirect denial of service

isa-webproxy-redirect-dos (16384) The risk level is classified as LowLow Risk

Description:

Microsoft Internet Security and Acceleration (ISA) Server are vulnerable to a denial of service attack against the Web Proxy service. Microsoft ISA Server could improperly handle an HTTP redirect action and fail to include the NULL terminating byte when copying the redirect into a temporary buffer. A remote attacker could create a specially-crafted URL, which would cause the Web Proxy service to crash, once the link is clicked.

Platforms Affected:

  • Microsoft, ISA Server 2000
  • Microsoft, ISA Server 2000 SP1
  • Microsoft, Windows 2003 Server

Remedy:

Upgrade to the latest version Service Pack for Microsoft ISA Server (SP2 or later), as listed in Microsoft Knowledge Base Article - 816460. See References.

Consequences:

Denial of Service

References:

Reported:

Jul 01, 2003

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For corrections or additions please email xforce@iss.net

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