RE: /instmsg/alias/annoying_web_logs ;)

From: Shawn K. Hall (RA/Security) (Securityat_private)
Date: Fri Oct 18 2002 - 16:40:29 PDT

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    Hi Dave,
    
    > I get billions of these things too, its part of some
    > MSN groups/chat thing, essentially it takes requests
    > the "alias" of the email address (daveat_private
    > => /instmsg/alias/dave). Might be fun to send back
    > some looooong responses ;) My favorites are all the
    > ones that originate from microsoft "tide"
    > addresses... They send me some funny referrers from
    > their intranet servers once in a while too.
    
    What you're seeing is actually from Exchange. It serves as a
    instant messaging service available through Outlook 2000 and
    2002 when used in corporate mode with Exchange to provide
    variable access methods to contact an individual. The request
    itself is a "discovery" request to determine whether your server
    'supports' instant messaging via Microsoft's protocol(s). The
    reason you get them at "/instmsg/alias/dave" is because someone
    that uses one of those clients added you to their address book,
    which then triggered their exchange server to poll your server
    (based on your email address) to see if it supported that
    protocol.
    
    There is a 'loosely' supportive list of the headers required to
    support this protocol on alternate platforms if you are
    interested. It functions via SOAP - sending xml headers within
    the request that identify certain behavioral properties. The
    specs are available at MS' website under the services listing.
    
    Oh - and since it is an Exchange function - it's not only
    clients that would likely be vulnerable, but Exchange Server,
    too.
    
    Regards,
    
    Shawn K. Hall
    http://ReliableAnswers.com/
    



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