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     b u f f e r 0 v e r f l 0 w   s e c u r i t y   a d v i s o r y   # 1 
      

         Advisory Name: Mailtraq remote file retriving
                 Date: 3/22/00
           Application: Mailtraq 1.1.4 for Win 95/98
                     Vendor: Fastraq Limited
                  WWW: www.mailtraq.com
             Severity: Any user can browse and even download
                        files from the remote computer
               Author: slash (tcsh@b0f.i-p.com)
       Homepage: b0f.morphed.net


 * Overview
  Mailtraq is a message server aimed at individuals, small and medium sized 
 companies and  home offices (SOHOS). Mailtraq’s primary goal is to provide online 
 services to local users by  storing incoming and outgoing news and mail messages 
 offline, then connecting to the Internet at  controlled intervals to deliver 
 outgoing messages and collect and store incoming messages.  Mailtraq provides fully 
 featured Mail, News and Intranet services, full disk logging of all  activity, 
 comprehensive firewall  facilities plus many other services such as a Finger client, 
 Mail-to-News and News-To-Mail gateways, Web Administration, etc. Mailtraq requires
 either the Windows NT (Server or Workstation), Windows 95 or Windows 98 operating 
 systems to be running on the machine on which it is loaded. 





 * The Problem
  By default Mailtraq installs it's Webmail Administration menu which is 
 accessible via https://some.domain.com/$/admin . The problem accoured when We tried 
 to retrive https://some.domain.com/ We configured Mailtraq's WWW server root directory 
 to be C:\Program Files\Mailtraq\websys\webmail Since that \websys\webmail directory 
 doesn't contain index.html the server returned the complete file listing of the 
 directory C:\Program Files\Mailtraq\websys\webmail. So we tried to exploit this a 
 little bit, and discovered that anyone can browse and download files on the remote 
 computer running Mailtraq Mail Server. Here is how to exploit it: 

 https://127.0.0.1/./../../../

 And You should get the complete listing of of files in c:\Program Files\ . When We 
 tried to exploit this, we could only browse files from c:\Program Files\ . When we 
 would add some more /../../../ to the exsisting URL we would get a "404 Page not 
 found". We played around with this a little bit and found a way to exploit this too. 
 To get to windows we should add some more /../../../ but a correct directory name 
 was required. So we did it this way:

 https://127.0.0.1/../../../../../../../../../../././../../././..././.../.../windows/

 Here it is!!! The complete listing of C:\windows . Now this is as far as we go. 
 On Windows NT machines running Mailtraq You could just get sam._ , run l0phtcrack 
 against it and compromise the machine. 

 There is also a bug that allows the remote attacker to find out in what directory 
 is Mailtraq installed in. By inputing a large string after https://some.domain.com/
 the server will return the path to Mailtraq's installation directory. Exsample:

 https://127.0.0.1/../aaaaaaaaa[a lot of a's]aaaaaaa

 The output You should get will look like this:

 File "C:\Program Files\Mailtraq\websys\webmail\aaaaaa[a lot of a's]aaaaaa" could 
 not be found 


 


 * Vulnerable Versions
  We tested version 1.1.4. on Windows 98. All versions prior to 1.1.4 are 
 vulnerable. We aren't sure if the Windows NT version is affected.
 

 

 * Fix
  At this time we aren't familiar with any fix for this bug.


      

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