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Security Update for Windows XP Embedded with SP1 (330994)

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This update addresses the Cumulative Patch for Outlook Express (330994) for Windows XP Embedded with SP1.

  • Details
    File name:
    Date Published:

    Additional_Info_Q330994.RTF

    7/13/2003
    Version:
    File size:

    2002

    9 KB
      This is the Microsoft Windows XP Embedded with Service Pack 1 component update to address MS03-014: Cumulative Patch for Outlook Express (330994).

      MHTML stands for MIME Encapsulation of Aggregate HTML. MHTML is an Internet standard that defines the MIME (Multipurpose Internet Mail Extensions) structure used to send HTML content in e-mail message bodies. The MHTML URL Handler in Windows is part of Outlook Express and provides a URL type that can be used on the local machine. This URL type (MHTML://) allows MHTML documents to be launched from a command line, from Start/Run, using Windows Explorer or from within Internet Explorer.

      A vulnerability exists in the MHTML URL Handler that allows any file that can be rendered as text to be opened and rendered as part of a page in Internet Explorer. As a result, it would be possible to construct a URL that referred to a text file that was stored on the local computer and have that file render as HTML. If the text file contained script, that script would execute when the file was accessed. Since the file would reside on the local computer, it would be rendered in the Local Computer Security Zone. Files that are opened within the Local Computer Zone are subject to fewer restrictions than files opened in other security zones.

      Using this method, an attacker could attempt to construct a URL and either host it on a website or send it via email. In the web based scenario, where a user then clicked on a URL hosted on a website, an attacker could have the ability to read or launch files already present on the local machine. In the case of an e-mail borne attack, if the user was using Outlook Express 6.0 or Outlook 2002 in their default configurations, or Outlook 98 or 2000 in conjunction with the Outlook Email Security Update, then an attack could not be automated and the user would still need to click on a URL sent in the e-mail. However if the user was not using Outlook Express 6.0 or Outlook 2002 in their default configurations, or Outlook 98 or 2000 in conjunction with the Outlook Email Security Update, the attacker could cause an attack to trigger automatically without the user having to click on a URL contained in an e-mail. In both the web based and e-mail based cases, any limitations on the user’s privileges would also restrict the capabilities of the attacker’s script.

      YOU MAY NOT PROVIDE THIS UPDATE OR THE LOCATION (URL) OF THIS UPDATE TO ANY THIRD PARTIES.

  • System Requirements
    Supported Operating System

    Windows 2000, Windows Server 2003, Windows XP

  • Install Instructions
      Important: This QFE requires Repository look-up may cause incorrect files to be copied (Q811279) be installed prior to this fix.

      1. Download Q330994_XPE_SP2_x86_ENU.exe from this page.
      2. Execute Q330994_XPE_SP2_x86_ENU.exe on a machine with the Windows XP Embedded with Service Pack 1 tools installed.
      This package will automatically import updated and new .sld files into the current database specified in Component Database Manager. It will also copy new binaries into the Windows XP Embedded with Service Pack 1 QFE Repository folder.

      Some of the .sld files may also require importing new repository objects. The new repositories will be created on the repository root holding the main Windows XP Embedded with Service Pack 1 repository. For information on moving repositories to other locations, see Moving a Repository in your Windows Embedded Studio documentation.

      After importing this update into your database, add the following components to your configuration(s) if you wish to use this update:

      • Internet Explorer - Hotfix Q330994

      • Outlook Express - Hotfix Q330994


      See Importing Components into the Database for more information.

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