Microsoft ISA Server Web Proxy redirect denial of service
| isa-webproxy-redirect-dos (16384) |  Low 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:
- Microsoft Knowledge Base Article - 816460, ISA Server 2000 Service Pack 2 Release Notes at http://support.microsoft.com/default.aspx?kbid=816460.
- Microsoft Knowledge Base Article - 818136 , Web Proxy Service May Crash When It Processes a Redirect Action at http://support.microsoft.com/?id=818136.
- BID-10482: Microsoft ISA Server Redirect URI Handler Web Proxy Service Remote Denial Of Service Vulnerability
Reported:
Jul 01, 2003
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