[NT] Buffer Overflow in WideChapter Browser

From: SecuriTeam (support_at_securiteam.com)
Date: 09/16/03

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Date: 16 Sep 2003 16:06:31 +0200

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      Buffer Overflow in WideChapter Browser
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.widechapter.com> WideChapter "is the most powerful multi
    Chapter multi tab web browser. WideChapter is a stable, fast,
    user-friendly browser. WideChapter gives each web site its own tab!
    WideChapter runs under Windows 98, Windows NT4, Windows ME, Windows 2000,
    and Windows XP and requires that IE to be installed. WideChapter is a
    standalone browser application that uses services provided by Microsoft
    Internet Explorer to navigate HTML. WideChapter currently requires
    Internet Explorer 5.5/above to be installed on the client computer".

    It is possible to cause a buffer overflow in WideChapter Browser by
    causing it to initiate a long HTTP request. The overflow allows
    modification of the EIP pointer - allowing a malicious attacker to cause
    the program to execute arbitrary code.

    DETAILS

    Vendor Status:
    The vendor has been informed, and they are fixing this bug.

    Proof of concept exploit:
    By embedding the following JavaScript into a web page: <
    script>window.open(http://AAA.. [Ax517])</script>, it is possible to cause
    the EIP to overwrite once a user visits the web page.

    An exploit for Windows XP Home has created and is available for download
    from: <http://www.elitehaven.net/wcexploit.zip>
    http://www.elitehaven.net/wcexploit.zip

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:b_naamneh@hotmail.com> Bahaa
    Naamneh.

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