Microsoft ISA Server Web Proxy redirect denial of service
| isa-webproxy-redirect-dos (16384) |  Medium 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.
Consequences:
Denial of Service
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.
References:
- Microsoft Knowledge Base Article - 816460: ISA Server 2000 Service Pack 2 Release Notes.
- Microsoft Knowledge Base Article - 818136 : Web Proxy Service May Crash When It Processes a Redirect Action.
- BID-10482: Microsoft ISA Server Redirect URI Handler Web Proxy Service Remote Denial Of Service Vulnerability
Platforms Affected:
- Microsoft ISA Server 2000
- Microsoft ISA Server 2000 SP1
- Microsoft Windows 2003 Server
Reported:
Jul 01, 2003
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email xforce@iss.net