What is the purpose of this alert?

 

This alert is to provide you with an overview of the new security bulletin being released (out-of-band) on January 21, 2010.

 

New Security Bulletin

Microsoft is releasing one new security bulletin (out-of-band) for newly discovered vulnerabilities:

 

Bulletin ID

Bulletin Title

Maximum Severity Rating

Vulnerability Impact

Restart Requirement

Affected Software

MS10-002

Cumulative Security Update for Internet Explorer (978207)

Critical

Remote Code Execution

Requires a restart

All supported versions of Internet Explorer on Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008*, Windows 7, and Windows Server 2008 R2*.

* Where indicated in the Affected Software table on the bulletin Web page, the vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 or Windows Server 2008 R2, when installed using the Server Core installation option. Please see the bulletin Web page at the link in the left column for more details.

 

Public Bulletin Webcast

 

Microsoft will host a webcast to address customer questions on this bulletin:

Title: Information About Microsoft's January 2010 Out-of-Band Security Bulletin Release

Date: Thursday, January 21, 2010, at 1:00 P.M. Pacific Time (U.S. & Canada).

URL: http://msevents.microsoft.com/CUI/EventDetail.aspx?EventID=1032440627

 

Public Resources related to this alert

 

·         Security Bulletin MS10-002 – Cumulative Security Update for Internet Explorer (978207):
http://www.microsoft.com/technet/security/bulletin/MS10-002.mspx

 

·         Microsoft Security Response Center (MSRC) Blog: http://blogs.technet.com/msrc/

 

·         Microsoft Security Research & Defense (SRD) Blog: http://blogs.technet.com/srd/

 

·         Microsoft Malware Protection Center (MMPC) Blog: http://blogs.technet.com/mmpc/

 

·         Microsoft Security Development Lifecycle (SDL) Blog: http://blogs.msdn.com/sdl/

 

New Security Bulletin Technical Details

 

In the following tables of affected and non-affected software, software editions that are not listed are past their support lifecycle. To determine the support lifecycle for your product and edition, visit the Microsoft Support Lifecycle Web site at http://support.microsoft.com/lifecycle/.

 

Bulletin Identifier

Microsoft Security Bulletin MS10-002

Bulletin Title

Cumulative Security Update for Internet Explorer (978207)

Executive Summary

This security update resolves seven privately reported vulnerabilities and one publicly disclosed vulnerability in Internet Explorer. The more severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer.

 

The security update addresses these vulnerabilities by modifying the way that Internet Explorer handles objects in memory, validates input parameters, and filters HTML attributes.

 

This security update also addresses the vulnerability first described in Microsoft Security Advisory 979352.

Affected Software

All supported versions of Internet Explorer on Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008*, Windows 7, and Windows Server 2008 R2*.


* Where indicated in the Affected Software table on the bulletin Web page, the vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 or Windows Server 2008 R2, when installed using the Server Core installation option. Please see the bulletin Web page at the link below for more details.

CVE, Exploitability Index Rating

·         CVE-2010-0244: Uninitialized Memory Corruption Vulnerability (EI = 1)

·         CVE-2010-0245: Uninitialized Memory Corruption Vulnerability (see note below)

·         CVE-2010-0246: Uninitialized Memory Corruption Vulnerability (see note below)

·         CVE-2010-0247: Uninitialized Memory Corruption Vulnerability (EI = 1)

·         CVE-2010-0248: HTML Object Memory Corruption Vulnerability (EI = 2)

·         CVE-2010-0249: HTML Object Memory Corruption Vulnerability (EI = 1)

·         CVE-2009-4074: XSS Filter Script Handling Vulnerability (see note below)

·         CVE-2010-0027: URL Validation Vulnerability (EI = 1)

 

Note: Please see the Exploitability Index table of the bulletin summary page for more details: http://www.microsoft.com/technet/security/bulletin/ms10-jan.mspx

Attack Vectors

·         A maliciously crafted Web page

·         A maliciously crafted HTML e-mail

Mitigating Factors

·         Users would have to be persuaded to visit a malicious Web site.

·         Exploitation only gains the same user rights as the logged on account. 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.

·         By default, all supported versions of Microsoft Outlook and Microsoft Outlook Express open HTML e-mail messages in the Restricted Sites zone.

·         By default, IE on Windows 2003 and Windows 2008 runs in a restricted mode.

Restart Requirement

The update will require a restart.

Bulletins Replaced by This Update

MS09-072

Publicly Disclosed?
Exploited?

CVE-2010-0249 has been publicly disclosed prior to release.

CVE-2010-0249 has been exploited in the wild at release.

Full Details

http://www.microsoft.com/technet/security/bulletin/MS10-002.mspx

 

Regarding Information Consistency

 

Microsoft’s security content posted to the Web is occasionally updated to reflect late-breaking information. If this results in an inconsistency between the information here and the information in Microsoft’s Web-based security content, the information in Microsoft’s Web-based security content is authoritative.