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A  U  S  C  E  R  T                                           A  L  E  R  T

                       AL-2008.0103 -- AUSCERT ALERT
                                   [Win]
  MS08-058 - Critical - Cumulative Security Update for Internet Explorer
                              15 October 2008

===========================================================================

        AusCERT Alert Summary
        ---------------------

Product:              Internet Explorer 5.01
                      Internet Explorer 6
                      Internet Explorer 6 Service Pack 1
                      Internet Explorer 7
Publisher:            Microsoft
Operating System:     Windows 2000
                      Windows XP
                      Windows Server 2003
                      Windows Vista
                      Windows Server 2008
Impact:               Execute Arbitrary Code/Commands
                      Access Confidential Data
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-3476 CVE-2008-3475 CVE-2008-3474
                      CVE-2008-3473 CVE-2008-3472 CVE-2008-2947

Original Bulletin:  
  http://www.microsoft.com/technet/security/bulletin/ms08-058.mspx

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Microsoft Security Bulletin MS08-058 - Critical

Cumulative Security Update for Internet Explorer (956390)

   Published: October 14, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves five privately reported vulnerabilities
   and one publicly disclosed vulnerability. The vulnerabilities could
   allow information disclosure or remote code execution if a user views
   a specially crafted Web page using Internet Explorer. Users whose
   accounts are configured to have fewer user rights on the system could
   be less impacted than users who operate with administrative user
   rights.

   This security update is rated Critical for Internet Explorer 5.01 and
   Internet Explorer 6 Service Pack 1, running on all supported editions
   of Microsoft Windows 2000, and for Internet Explorer 6 running on all
   supported editions of Windows XP. For Internet Explorer 7 running on
   all supported editions of Windows XP and Windows Vista, this security
   update is rated Important. Otherwise, this security update is rated
   Moderate or Low. For more information, see the subsection, Affected
   and Non-Affected Software, in this section.

   The security update addresses these vulnerabilities by modifying the
   way that Internet Explorer handles the error resulting in the
   exploitable condition. 

   Recommendation. Microsoft recommends that customers apply the update
   immediately.

Affected Software

   Internet Explorer 5.01 

   Internet Explorer 6 Service Pack 1

   Internet Explorer 6

   Internet Explorer 7

Vulnerability Information

Window Location Property Cross-Domain Vulnerability - CVE-2008-2947

   A remote code execution or information disclosure vulnerability exists
   in Internet Explorer that could allow an attacker to gain access to a
   browser window in another domain or Internet Explorer zone. An
   attacker could exploit the vulnerability by constructing a specially
   crafted Web page that could allow remote code execution or information
   disclosure, depending on the operating system, if a user viewed the
   Web page.

Workarounds for Window Location Property Cross-Domain Vulnerability -
CVE-2008-2947

   Set Internet and Local intranet security zone settings to "High" to
   prompt before running ActiveX Controls and Active Scripting in these
   zones

   Configure Internet Explorer to prompt before running Active Scripting
   or to disable Active Scripting in the Internet and Local intranet
   security zone

HTML Element Cross-Domain Vulnerability - CVE-2008-3472

   A remote code execution or information disclosure vulnerability exists
   in Internet Explorer that could allow script to gain access to a
   browser window in another domain or Internet Explorer zone. An
   attacker could exploit the vulnerability by constructing a specially
   crafted Web page that could allow remote code execution or information
   disclosure, depending on the operating system, if a user viewed the
   Web page.

Workarounds for HTML Element Cross-Domain Vulnerability - CVE-2008-3472

   Set Internet and Local intranet security zone settings to "High" to
   prompt before running ActiveX Controls and Active Scripting in these
   zones

   Configure Internet Explorer to prompt before running Active Scripting
   or to disable Active Scripting in the Internet and Local intranet
   security zone

Event Handling Cross-Domain Vulnerability - CVE-2008-3473

   A remote code execution or information disclosure vulnerability exists
   in Internet Explorer that could allow script to gain access to a
   browser window in another domain or Internet Explorer zone. An
   attacker could exploit the vulnerability by constructing a specially
   crafted Web page that could allow remote code execution or information
   disclosure, depending on the operating system, if a user viewed the
   Web page.

Workarounds for Event Handling Cross-Domain Vulnerability - CVE-2008-3473

   Set Internet and Local intranet security zone settings to "High" to
   prompt before running ActiveX Controls and Active Scripting in these
   zones

   Configure Internet Explorer to prompt before running Active Scripting
   or to disable Active Scripting in the Internet and Local intranet
   security zone

Cross-Domain Information Disclosure Vulnerability - CVE-2008-3474

   An information disclosure vulnerability exists in Internet Explorer
   that could allow script to gain access to a browser window in another
   domain or Internet Explorer zone. An attacker could exploit the
   vulnerability by constructing a specially crafted Web page that could
   allow information disclosure if a user viewed the Web page.

Workarounds for Cross-Domain Information Disclosure Vulnerability -
CVE-2008-3474

   Set Internet and Local intranet security zone settings to "High" to
   prompt before running ActiveX Controls and Active Scripting in these
   zones

   Configure Internet Explorer to prompt before running Active Scripting
   or to disable Active Scripting in the Internet and Local intranet
   security zone

Uninitialized Memory Corruption Vulnerability - CVE-2008-3475

   A remote code execution vulnerability exists in the way Internet
   Explorer accesses an object that has not been correctly initialized or
   that has been deleted. An attacker could exploit the vulnerability by
   constructing a specially crafted Web page. When a user views the Web
   page, the vulnerability could allow remote code execution. An attacker
   who successfully exploited this vulnerability could gain the same user
   rights as the logged-on user.

Workarounds for Uninitialized Memory Corruption Vulnerability -
CVE-2008-3475

   Set Internet and Local intranet security zone settings to "High" to
   prompt before running ActiveX Controls and Active Scripting in these
   zones

   Configure Internet Explorer to prompt before running Active Scripting
   or to disable Active Scripting in the Internet and Local intranet
   security zone

HTML Objects Memory Corruption Vulnerability - CVE-2008-3476

   A remote code execution vulnerability exists in Internet Explorer due
   to attempts to access uninitialized memory in certain situations. An
   attacker could exploit the vulnerability by constructing a specially
   crafted Web page. When a user views the Web page, the vulnerability
   could allow remote code execution. An attacker who successfully
   exploited this vulnerability could gain the same user rights as the
   logged-on user.

Workarounds for HTML Objects Memory Corruption Vulnerability - CVE-2008-3476

   Set Internet and Local intranet security zone settings to "High" to
   prompt before running ActiveX Controls and Active Scripting in these
   zones

   Configure Internet Explorer to prompt before running Active Scripting
   or to disable Active Scripting in the Internet and Local intranet
   security zone

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        http://www.auscert.org.au/render.html?it=3192

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
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