BackToFramedJpu - a successor of BackToJpu attack

From: Liu Die Yu (liudieyuinchina_at_yahoo.com.cn)
Date: 11/25/03

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    Date: 25 Nov 2003 09:56:38 -0000
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    BackToFramedJpu - a successor of BackToJpu attack

    [tested]
    OS:Win2k3,CN version
    IE: with MS03-048 installed.

    OS:WinXp, CN version
    Microsoft Internet Explorer v6.Sp1; up-to-date on 2003/11/16

    [overview]
    A cross-zone scripting vulnerability has been found in Internet Explorer. If a webpage contains some subframe(either FRAME tag or IFRAME tag), its security zone may be compromised.

    [demo]
    There is a harmless demo:
    http://www.safecenter.net/UMBRELLAWEBV4/BackToFramedJpu/BackToFramedJpu-MyPage.htm

    [technical details]
    After applying MS03-048 patch, no javascript-protocol URL won't be stored in URL history list any more, which means classical "javascript-protocol URL in history" attack doesn't work any more.
    (Liu Die Yu's http://www.safecenter.net/UMBRELLAWEBV4/BackMyParent2/index.html)

    However, if an attacker do the following things:
    Navigate a sub-frame in victim document to a javascript-protocol URL,
    (first, navigate sub-frame to attacker's page, and then navigate the sub-frame a javascript-protocol URL)
    and then navigate the top window away,
    At last,navigate back("history.back()").

    the javascript-protocol URL will be loaded by the top window(victim document) and script in the javascript-protocol URL will be executed in the security zone of victim document - a.k.a cross-site/zone/domain scripting

    [Workaround]
    Disable Active Scripting in INTERNET zone.

    [Greetings]
    greetings to:
    Drew Copley, dror, guninski and mkill.

    -----
    all mentioned resources can always be found at UMBRELLA.MX.TC

    [people]
    LiuDieyuinchina [N0-@-Sp2m] yahoo.com.cn
    UMBRELLA.MX.TC ==> How to contact "Liu Die Yu"

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