Uočen je i ispravljen novi sugurnosni nedostatak vezan uz Microsoft Visio 2003 Service Pack 3 koji udaljenim napadačima omogućuje pokretanje proizvoljnog programskog koda i povećanje ovlasti na ranjivom sustavu.

Microsoft Security Bulletin MS11-055 - Important
Vulnerability in Microsoft Visio Could Allow Remote Code Execution (2560847)
Published: July 12, 2011

Version: 1.0
General Information
Executive Summary

This security update resolves a publicly disclosed vulnerability in Microsoft Visio. The vulnerability could allow remote code execution if a user opens a legitimate Visio file that is located in the same network directory as a specially crafted library 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 Microsoft Visio 2003 Service Pack 3. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by correcting the manner in which Microsoft Visio loads external libraries. 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. Microsoft Knowledge Base Article 2560847 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues. When currently known issues and recommended solutions pertain only to specific releases of this software, this article provides links to further articles.
Top of sectionTop of section
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
(KB2493523)
	

Remote Code Execution
	

Important
	

None

Non-Affected Software 
Office and Other Software

Microsoft Visio 2002 Service Pack 2

Microsoft Visio 2007 Service Pack 2

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

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

Microsoft Visio 2010 Viewer and Microsoft Visio 2010 Viewer Service Pack 1
Top of sectionTop of section
	
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.

I have a non-vulnerable version of Microsoft Office 2003 software installed, why am I being offered this update? 
Although the attack vector for exploiting the vulnerability described in CVE-2010-3148 is through Microsoft Visio 2003, the vulnerable code exists in a shared component of Microsoft Office. Some non-affected software, such as Microsoft Office 2003 Suite and Microsoft Office 2003 standalone programs, contain the vulnerable shared component of Microsoft Office, but because they do not access the vulnerable code, they are not affected by this vulnerability. However, since the vulnerable code is present, this update will be offered.

Does the offer to update a non-vulnerable version of Microsoft Office software constitute an issue in the Microsoft update mechanism? 
No, the update mechanism is functioning correctly in that it detects a lower version of the files on the system than in the update package and thus, offers the update.

Is this update related to Microsoft Security Advisory 2269637? 
Yes, the Microsoft Visio Insecure Library Loading Vulnerability (CVE-2010-3148) addressed by this update is related to the class of vulnerabilities, described in Microsoft Security Advisory 2269637, that affects how applications load external libraries. This security update addresses a particular instance of this type of vulnerability.

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.
Top of sectionTop of section
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 July bulletin summary. For more information, see Microsoft Exploitability Index.
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software	Microsoft Visio Insecure Library Loading Vulnerability - CVE-2010-3148 	Aggregate Severity Rating

Microsoft Visio 2003 Service Pack 3
	

Important 
Remote Code Execution
	

Important
Top of sectionTop of section
	
Microsoft Visio Insecure Library Loading Vulnerability - CVE-2010-3148

A remote code execution vulnerability exists in the way that Microsoft Visio handles the loading of DLL 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 impacted 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-2010-3148.
	
Mitigating Factors for Microsoft Visio Insecure Library Loading Vulnerability - CVE-2010-3148

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:
â