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

                       AL-2008.0088 -- AUSCERT ALERT
                                   [Win]
        MS08-045 - Cumulative Security Update for Internet Explorer
                              13 August 2008

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

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

Product:              Internet Explorer 7
                      Internet Explorer 6 Service Pack 1
                      Internet Explorer 6
                      Internet Explorer 5.01
Publisher:            Microsoft
Operating System:     Windows Server 2008
                      Windows Server 2003
                      Windows Vista
                      Windows XP
                      Windows 2000
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2008-2259 CVE-2008-2258 CVE-2008-2257
                      CVE-2008-2256 CVE-2008-2255 CVE-2008-2254

Original Bulletin:  
  http://www.microsoft.com/technet/security/bulletin/ms08-045.mspx

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Microsoft Security Bulletin MS08-045 - Critical

Cumulative Security Update for Internet Explorer (953838)

   Published: August 12, 2008

   Version: 1.0

General Information

Executive Summary

   This security update resolves five privately reported vulnerabilities
   and one publicly disclosed vulnerability. All of the vulnerabilities
   could allow 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 all supported releases of
   Internet Explorer. For more information, see the subsection, Affected
   Software, in this section.

   Recommendation. Microsoft recommends that customers apply the update
   immediately.

Affected Software

   Internet Explorer 5.01 

   Internet Explorer 6

   Internet Explorer 6 Service Pack 1

   Internet Explorer 7

Vulnerability Information

HTML Objects Memory Corruption Vulnerability - CVE-2008-2254

   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-2008-2254

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

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

   Read e-mail messages in plain text format if you are using Microsoft
   Outlook 2002 or a later version, or Outlook Express 6 SP1 or a later
   version, to help protect yourself from the HTML e-mail attack vector.

HTML Objects Memory Corruption Vulnerability - CVE-2008-2255

   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-2008-2255

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

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

   Read e-mail messages in plain text format if you are using Microsoft
   Outlook 2002 or a later version, or Outlook Express 6 SP1 or a later
   version, to help protect yourself from the HTML e-mail attack vector.

Uninitialized Memory Corruption Vulnerability - CVE-2008-2256

   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-2008-2256

   None

HTML Objects Memory Corruption Vulnerability - CVE-2008-2257 and
CVE-2008-2258

   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-2008-2257
and CVE-2008-2258

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

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

   Read e-mail messages in plain text format if you are using Microsoft
   Outlook 2002 or a later version, or Outlook Express 6 SP1 or a later
   version, to help protect yourself from the HTML e-mail attack vector.

HTML Component Handling Vulnerability - CVE-2008-2259

   A remote code execution vulnerability exists in the way Internet
   Explorer handles argument validation in print preview handling. 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 rights as the logged
   on user.

Workarounds for HTML Component Handling Vulnerability - CVE-2008-2259

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

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

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        http://www.auscert.org.au/render.html?cid=1980

If you believe that your computer system has been compromised or attacked in 
any way, we encourage you to let us know by completing the secure National IT 
Incident Reporting Form at:

        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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