SurfControl Web Filter for Microsoft ISA Server Vulnerability

From: thomas adams (tgadamsat_private)
Date: Thu Jun 19 2003 - 07:12:02 PDT

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    SurfControl Web Filter for Microsoft ISA Server Vulnerability
    
    
    Package:		SurfControl Web Filter for Microsoft ISA
    Vendor Web Site:	http://www.surfcontrol.com
    Version: 		4.2.0.21
    Platforms: 		Windows 2000 Server		
    Local:			No
    Remote: 		Yes
    Fix Available:		No (recommended steps listed below)
    Vendor Contacted: 	Sunday, June 08, 2003 
    Advisory Author:	Thomas Adams (tgadamsat_private)
    
    
    
    Background:
    SurfControl Web Filter is a url filtering system, designed to be easily 
    deployed onto most networks. SurfControl for Microsoft ISA is a plugin 
    the allows the Microsoft ISA server to have more control over the 
    internet usage. The plugin still allows most of the same benefits from 
    the stand alone product including: customizable reporting, easy admin 
    interface, and the remote interface for report retrieval.
    
    
    Exploit:
    An attacker is able to view/download any file from the server using a 
    directory traversal attack:
    
    http://isa-surfserver:8888/.../.../.../.../winnt/ 
    
    
    Vendor Response:
    SurfControl team was notified concerning the above vulnerability. 
    SurfControl had previous knowledge that this existed on the stand alone 
    SurfControl platforms, but did not know it existed on the plugin for 
    Microsoft ISA. They recommended disabling the reports server and said it 
    is turned on by default for "convenience to users."  Convenience before 
    security from a leader in filter products? 
    
    To disable the report server, go to Admin Tools> Services> and stop 
    SurfControl Web Filter Report Server
    



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