Otkrivena su dva nedostatka u paketu Microsoft Visio kojeg mogu iskoristiti udaljeni napadači kako bi pokretali proizvoljni programski kod.

Microsoft Security Bulletin MS11-060 - Important
Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (2560978)
Published: August 09, 2011

Version: 1.0
General Information
Executive Summary

This security update resolves two privately reported vulnerabilities in Microsoft Visio. The vulnerabilities could allow remote code execution if a user opens a specially crafted Visio file. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. 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 Important for all supported editions of Microsoft Visio 2003, Microsoft Visio 2007, and Microsoft Visio 2010. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerabilities by correcting the way that Microsoft Visio validates objects in memory when parsing specially crafted Visio files. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

Recommendation. Customers can configure automatic updating to check online for updates from Microsoft Update by using the Microsoft Update service. Customers who have automatic updating enabled and configured to check online for updates from Microsoft Update typically 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 from Microsoft Update and install this update manually. For information about specific configuration options in automatic updating in supported editions of Windows XP and Windows Server 2003, see Microsoft Knowledge Base Article 294871. For information about automatic updating in supported editions of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2, see Understanding Windows automatic updating.

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

See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.

Known Issues. None
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Affected and Non-Affected Software

The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.

Affected Software 
Microsoft Office and Other Productivity Software	Maximum Security Impact	Aggregate Severity Rating	Bulletins Replaced by this Update

Microsoft Visio 2003 Service Pack 3
(KB2553009)
	

Remote Code Execution
	

Important
	

MS11-008

Microsoft Visio 2007 Service Pack 2
(KB2553010)
	

Remote Code Execution
	

Important
	

MS11-008

Microsoft Visio 2010 and Microsoft Visio 2010 Service Pack 1 (32-bit editions)
(KB2553008)
	

Remote Code Execution
	

Important
	

None

Microsoft Visio 2010 and Microsoft Visio 2010 Service Pack 1 (64-bit editions)
(KB2553008)
	

Remote Code Execution
	

Important
	

None

Non-Affected Software 
Office and Other Software

Microsoft Visio 2010 Viewer and Microsoft Visio 2010 Viewer Service Pack 1
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Frequently Asked Questions (FAQ) Related to This Security Update

Where are the file information details? 
Refer to the reference tables in the Security Update Deployment section for the location of the file information details.

Why does this update address several reported security vulnerabilities? 
This update contains support for several vulnerabilities because the modifications that are required to address these issues are located in related files. Instead of having to install several updates that are almost the same, customers need to install this update only.

I am using an older release of the software discussed in this security bulletin. What should I do? 
The affected software listed in this bulletin have been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, visit the Microsoft Support Lifecycle Web site.

It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see Select a Product for Lifecycle Information. For more information about service packs for these software releases, see Lifecycle Supported Service Packs.

Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, visit the Microsoft Worldwide Information Web site, select the country in the Contact Information list, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the Microsoft Support Lifecycle Policy FAQ.
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Vulnerability Information
	
Severity Ratings and Vulnerability Identifiers

The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the August bulletin summary. For more information, see Microsoft Exploitability Index.
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software	pStream Release RCE Vulnerability - CVE-2011-1972	Move Around the Block RCE Vulnerability - CVE-2011-1979	Aggregate Severity Rating

Microsoft Visio 2003 Service Pack 3
	

Important 
Remote Code Execution
	

Important 
Remote Code Execution
	

Important

Microsoft Visio 2007 Service Pack 2
	

Important 
Remote Code Execution
	

Important 
Remote Code Execution
	

Important

Microsoft Visio 2010 (32-bit editions) and Microsoft Visio 2010 (32-bit editions) Service Pack 1
	

Important 
Remote Code Execution
	

Not applicable
	

Important

Microsoft Visio 2010 (64-bit editions) and Microsoft Visio 2010 (64-bit editions) Service Pack 1
	

Important 
Remote Code Execution
	

Not applicable
	

Important
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pStream Release RCE Vulnerability - CVE-2011-1972

A remote code execution vulnerability exists in the way that Microsoft Visio validates objects in memory when parsing specially crafted Visio files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less affected than users who operate with administrative user rights.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2011-1972.
	
Mitigating Factors for pStream Release RCE Vulnerability - CVE-2011-1972

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:
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