Re: Drivial Pursuit: Internet Explorer Browser & Your Files and Folders !

From: Thor Larholm (thor_at_PIVX.COM)
Date: 07/23/03

  • Next message: Francis Favorini: "Re: Alert: Microsoft Security Bulletin - MS03-030"
    Date:         Wed, 23 Jul 2003 14:20:39 -0700
    To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
    
    

    I can positively confirm this vulnerability on both WMP 7 and 8 on Windows
    98, ME, 2000, XP and 2003. The default Enhanced Security Configuration of IE
    on Windows 2003 does nothing to prevent automatically opening certain media
    types.

    The ASF file can be automatically opened through an IFRAME, both on a
    webpage and in an email - even with scripting disabled in the Restricted
    Zone, which has so far been a major mitigating factor. This means that an
    emailborne exploit would execute immediately when a user opened or previewed
    an HTML-based email.

    Regards
    Thor Larholm
    PivX Solutions, LLC - Senior Security Researcher

    -----Original Message-----
    From: Windows NTBugtraq Mailing List
    [mailto:NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM]On Behalf Of
    http-equiv@excite.com
    Sent: 23. juli 2003 13:18
    To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
    Subject: Drivial Pursuit: Internet Explorer Browser & Your Files and
    Folders !

    Wednesday, 23 July, 2003

    Yet another quaint lead-up to "silent delivery and installation of an
    executable on a target computer. No client input other than viewing a
    web page" !

    This is getting boring.

    A myriad of technical hurdles have been recently placed to disallow
    access to files and folders on the local machine from the internet.
    Previously simple redirects could defeat that, but that too has been
    eliminated.

    Coupled with a myriad of existing possibilities of placing arbitrary
    files in known locations on the local machine, along with perhaps
    several other well known applications that create sensitive files in
    known locations on the local machine, accessing all of these with our
    trusty browser commonly known as IE, leaves us with ample opportunity
    to wreak further havoc on the unsuspecting customers of the
    manufacturer, one "Microsoft".

    For an ever increasing list of component possibilities seek here:

    http://www.pivx.com/larholm/unpatched/

    Once again the problem lies within our trusty and battle-hardened
    Windows Media Player. Two second creation of Zero second URL flip to
    local machine, allows us the desired access. Whether this is the
    result of a 'trusted' media file or not is unclear. Not important.
    Custom crafted media files seem to fail.

    Working Example:

    Fails on WMP 9 but fully functional on all others regardless of
    operating system:

    ATTENTION: demo is merely first step. Plug 'n Play any of the
    available components in the listing above for maximum results:

    http://www.malware.com/once.again!.html

    Notes:

    1. We appear to be going around and around in circles now
    2. We see no possibility of ever expending one red cent to this
    particular toy manufacturer. As such we are stuck with what we have.
    We would be interested to thoroughly examining the latest and
    greatest toys created by these people and should someone feel like
    lending us a couple shiny new machines with default installs of the
    latest and greatest toys, we'll be happy come to some sort of mutualy
    beneficial arrangement.
    3. None.

    --
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