[NT] Poisonous Style for Dialog Window Bypasses Zone Security

From: support@securiteam.com
Date: 12/04/02

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      Poisonous Style for Dialog Window Bypasses Zone Security
    ------------------------------------------------------------------------

    SUMMARY

    By appointing the style of the text in a window (a "ModalDialog" window) a
    remote attacker is able to execute arbitrary JavaScript and HTML code
    regardless of zone difference (i.e. he is able to steel the cookies used
    in any domain).

    DETAILS

    Vulnerable systems:
     * Internet Explorer version 6.0.2600.0000
     * Internet Explorer version 5.50.4807.2300

    Demonstration:
    (Outside the SecurITeam website)
     
    <http://www16.brinkster.com/liudieyu/PoisonousSTYLEforDialog/PoisonousSTYLEforDialog-MyPage.htm> http://www16.brinkster.com/liudieyu/PoisonousSTYLEforDialog/PoisonousSTYLEforDialog-MyPage.htm
    Or
     <http://clik.to/liudieyu> http://clik.to/liudieyu and select:
    PoisonousSTYLEforDialog-MyPage section.

    Example:
    One style type that can cause execution of script:
    <IMG width="0" height="0" style="width: expression(alert());">

    ADDITIONAL INFORMATION

    The information has been provided by
    <mailto:liudieyuinchina@yahoo.com.cn> Liu Die Yu.

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