High Risk Vulnerability in HTML Help (ITSS Parser)

From: NGSSoftware Insight Security Research (nisr_at_nextgenss.com)
Date: 06/15/05

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    To: <vulnwatch@vulnwatch.org>, <bugtraq@securityfocus.com>, <ntbugtraq@listserv.ntbugtraq.com>
    Date: Wed, 15 Jun 2005 10:34:30 +0100

    Peter Winter-Smith of NGSSoftware has discovered a high risk vulnerability
    in one of the dependencies of HTML Help, the InfoTech Storage System parser.
    This flaw can permit arbitrary code execution through a number of
    applications including HTML Help, Internet Explorer and Outlook/Outlook
    Express when parsing certain file-types.

    Research has proven this vulnerability to be trivially exploitable on
    Windows XP SP2 despite certain inbuild protective mechanisms which XPSP2

    This issue has been resolved in the Microsoft bulletin MS05-026, which may
    be downloaded from:


    NGSSoftware are going to withhold details of this flaw for three months.
    Full details will be published on the 15th September 2005. This three month
    window will allow users of Microsoft Windows the time needed to apply the
    patch before the details are released to the general public. This reflects
    NGSSoftware's approach to responsible disclosure.

    NGSSoftware Insight Security Research
    +44(0)208 401 0070

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