[NT] MSN Heartbeat Control Buffer Overflow (MS04-038)

From: SecuriTeam (support_at_securiteam.com)
Date: 01/25/05

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Date: 25 Jan 2005 18:54:28 +0200

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      MSN Heartbeat Control Buffer Overflow (MS04-038)
    ------------------------------------------------------------------------

    SUMMARY

    A vulnerability has been discovered in the MSN Heartbeat ActiveX component
    which can allow remote code execution through Internet Explorer. This
    component is installed by some MSN gaming sites and is marked safe for
    scripting by default.

    DETAILS

    When initializing the Heartbeat control in a web page, there are several
    parameters which must be set to access the functionality within the
    control, such as URLs and filenames. When providing an overly string for
    the SetupData parameter, a heap based buffer overflow occurs. A reliable
    arbitrary dword overwrite is possible, and it is trivial to exploit this
    flaw.

    Vendor Status:
    Microsoft have released an update for the MSN Heartbeat component which
    addresses this issue. See: h
    <http://www.microsoft.com/technet/security/bulletin/MS04-038.mspx>
    Cumulative Security Update for Internet Explorer (834707)

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:nisr@nextgenss.com>
    NGSSoftware Insight Security Research.
    The original article can be found at:
    <http://www.ngssoftware.com/advisories/heartbeatfull.txt>
    http://www.ngssoftware.com/advisories/heartbeatfull.txt

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