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

                       AL-2009.0012 -- AUSCERT ALERT
                                   [Win]
        MS09-002 - Cumulative Security Update for Internet Explorer
                             13 February 2009

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        AusCERT Alert Summary
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Product:              Internet Explorer 7
Publisher:            Microsoft
Operating System:     Windows
Impact:               Execute Arbitrary Code/Commands
Access:               Remote/Unauthenticated
CVE Names:            CVE-2009-0075 CVE-2009-0076

Original Bulletin:    
  http://www.microsoft.com/technet/security/bulletin/ms09-002.mspx

Revision History:     February 13 2009: Added CVE Reference
                      February 11 2009: Initial Release

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Microsoft Security Bulletin MS09-002 - Critical

Cumulative Security Update for Internet Explorer (961260)

   Published: February 10, 2009

   Version: 1.0

General Information

Executive Summary

   This security update resolves two privately reported vulnerabilities. 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 Internet Explorer 7 running on 
   supported editions of Windows XP and Windows Vista. For Internet 
   Explorer 7 running on supported editions of Windows Server 2003 and 
   Windows Server 2008, this security update is rated Moderate. 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. For more information about the vulnerabilities, see the 
   Frequently Asked Questions (FAQ) subsection under the next section, 
   Vulnerability Information.

   Recommendation. The majority of customers have automatic updating enabled 
   and will not need to take any action because this security update will be 
   downloaded and installed automatically. Customers who have not enabled 
   automatic updating need to check for updates and install this update 
   manually. For information about specific configuration options in 
   automatic updating, see Microsoft Knowledge Base Article 294781.

   For administrators and enterprise installations, or end users who want to 
   install this security update manually, Microsoft recommends that customers 
   apply the update immediately using update management software, or by 
   checking for updates using the Microsoft Update service.

Affected Software

   Internet Explorer 7
  
Vulnerability Information

Uninitialized Memory Corruption Vulnerability - CVE-2009-0075

A remote code execution vulnerability exists in the way Internet Explorer 
accesses an object 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.

CSS Memory Corruption Vulnerability - CVE-2009-0076

A remote code execution vulnerability exists in the way Internet Explorer 
handles Cascading Style Sheets (CSS). 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.

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If you believe that your computer system has been compromised or attacked in 
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Incident Reporting Form at:

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

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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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