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  Microsoft Visio multiple security vulnerabilities

  [CORE-2010-0428] Microsoft Office Visio DXF File Insertion Buffer Overflow

From:MICROSOFT <secure_(at)_microsoft.com>
Date:16.04.2010
Subject:Microsoft Security Bulletin MS10-028 - Important Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (980094)

Microsoft Security Bulletin MS10-028 - Important
Vulnerabilities in Microsoft Visio Could Allow Remote Code Execution (980094)
Published: April 13, 2010

Version: 1.0
General Information
Executive Summary

This security update resolves two privately reported vulnerabilities in Microsoft Office Visio. The vulnerabilities could allow remote code execution if a user opens a specially crafted Visio file. An attacker who successfully exploited these vulnerabilities could gain the same user rights as the local 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 Office Visio 2002 Service Pack 2, Microsoft Office Visio 2003 Service Pack 3, Microsoft Office Visio 2007 Service Pack 1 and Microsoft Office Visio 2007 Service Pack 2. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses these vulnerabilities by correcting the way that Microsoft Office Visio validates attributes and calculates indexes when opening 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.  Microsoft recommends that customers apply the update at the earliest opportunity.

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
Office Software Maximum Security Impact Aggregate Severity Rating Bulletins Replaced by this Update

Microsoft Office Visio 2002 Service Pack 2
(KB979364)


Remote Code Execution


Important


MS09-062

Microsoft Office Visio 2003 Service Pack 3
(KB979356)


Remote Code Execution


Important


MS09-005

Microsoft Office Visio 2007 Service Pack 1
(KB979365)


Remote Code Execution


Important


MS09-005

Microsoft Office Visio 2007 Service Pack 2
(KB979365)


Remote Code Execution


Important


None

Non-Affected Software
Office Software

Microsoft Office Visio Viewer 2007 Service Pack 1 and Microsoft Office Visio Viewer 2007 Service Pack 2

Microsoft Visio Enterprise Network Tools
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Frequently Asked Questions (FAQ) Related to This Security Update

Why is this security update rated Important in severity?

Microsoft Office Visio 2002 and later versions have a built-in feature that prompts a user to Open, Save, or Cancel before opening a document. This mitigating factor reduces the remote code execution vulnerability from Critical to Important because the vulnerability requires more than a single user action to complete the exploit.

Where can I find more information about Microsoft Office Viewer?
For information about current and retired versions of Microsoft Office Viewer, see Microsoft Knowledge Base Article 979860.

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 April bulletin summary. For more information, see Microsoft Exploitability Index.
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software Visio Attribute Validation Memory Corruption Vulnerability - CVE-2010-0254 Visio Index Calculation Memory Corruption Vulnerability - CVE-2010-0256 Aggregate Severity Rating

Microsoft Office Visio 2002 Service Pack 2


Important
Remote Code Execution


Important
Remote Code Execution


Important

Microsoft Office Visio 2003 Service Pack 3


Important
Remote Code Execution


Important
Remote Code Execution


Important

Microsoft Office Visio 2007 Service Pack 1 and Microsoft Office Visio 2007 Service Pack 2


Important
Remote Code Execution


Important
Remote Code Execution


Important
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Visio Attribute Validation Memory Corruption Vulnerability - CVE-2010-0254

A remote code execution vulnerability exists in the way that Microsoft Office Visio validates attributes when handling 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-2010-0254.

Mitigating Factors for Visio Attribute Validation Memory Corruption Vulnerability - CVE-2010-0254

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:


Users of Microsoft Office Visio 2002 and later versions of Visio will be prompted with Open, Save, or Cancel before opening a document. This is a mitigating factor because the vulnerability requires more than a single user action to complete the exploit.


The vulnerability cannot be exploited automatically through e-mail. For an attack to be successful, a user must open an attachment that is sent in an e-mail message. The attacker would have to convince the user to open the attachment in order to exploit the vulnerability.


In a Web-based attack scenario, an attacker would have to host a Web site that contains a specially crafted Visio file that is used to attempt to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. An attacker would have no way to force users to visit a specially crafted Web site. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link that takes users to the attacker's Web site, and then convince the users to open a specially crafted Visio file.


An attacker who successfully exploited this vulnerability could gain the same user rights as the local 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.
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Workarounds for Visio Attribute Validation Memory Corruption Vulnerability - CVE-2010-0254

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:


Do not open Visio files that you receive from untrusted sources or that you receive unexpectedly from trusted sources. This vulnerability could be exploited when a user opens a specially crafted file. The file extension .vsd is usually associated with Visio files.
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FAQ for Visio Attribute Validation Memory Corruption Vulnerability - CVE-2010-0254

What is the scope of the vulnerability?
This is a remote code execution vulnerability. 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.

What causes the vulnerability?
The vulnerability exists in the way Microsoft Office Visio handles memory when opening specially crafted Visio files.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could run arbitrary code as the logged-on user. If a user is logged on with administrative user rights, an attacker could take complete control of the 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.

How could an attacker exploit the vulnerability?
This vulnerability requires that a user open a specially crafted Visio file with an affected version of Microsoft Office Visio.

In an e-mail attack scenario, an attacker could exploit the vulnerability by sending a specially crafted Visio file to the user and by convincing the user to open the file.

In a Web-based attack scenario, an attacker would have to host a Web site that contains a specially crafted Visio file that is used to attempt to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. An attacker would have no way to force users to visit a specially crafted Web site. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link that takes them to the attacker's site.

What systems are primarily at risk from the vulnerability?
Systems where Microsoft Office Visio is used, including workstations and terminal servers, are primarily at risk. Servers could be at more risk if administrators allow users to log on to servers and to run programs. However, best practices strongly discourage allowing this.

What does the update do?
This update addresses the vulnerability by correcting the way that Microsoft Office Visio validates attributes when opening specially crafted Visio files.

When this security bulletin was issued, had this vulnerability been publicly disclosed?
No. Microsoft received information about this vulnerability through responsible disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited?
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers and had not seen any examples of proof of concept code published when this security bulletin was originally issued.
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Visio Index Calculation Memory Corruption Vulnerability - CVE-2010-0256

A remote code execution vulnerability exists in the way that Microsoft Office Visio calculates indexes when handling 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-2010-0256.

Mitigating Factors for Visio Index Calculation Memory Corruption Vulnerability - CVE-2010-0256

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:


Users of Microsoft Office Visio 2002 and later versions of Visio will be prompted with Open, Save, or Cancel before opening a document. This is a mitigating factor because the vulnerability requires more than a single user action to complete the exploit.


The vulnerability cannot be exploited automatically through e-mail. For an attack to be successful, a user must open an attachment that is sent in an e-mail message. The attacker would have to convince the user to open the attachment in order to exploit the vulnerability.


In a Web-based attack scenario, an attacker would have to host a Web site that contains a specially crafted Visio file that is used to attempt to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. An attacker would have no way to force users to visit a specially crafted Web site. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link that takes users to the attacker's site, and then convince the users to open a specially crafted Visio file.


An attacker who successfully exploited this vulnerability could gain the same user rights as the local 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.
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Workarounds for Visio Index Calculation Memory Corruption Vulnerability - CVE-2010-0256

Workaround refers to a setting or configuration change that does not correct the underlying vulnerability but would help block known attack vectors before you apply the update. Microsoft has tested the following workarounds and states in the discussion whether a workaround reduces functionality:


Do not open Visio files that you receive from untrusted sources or that you receive unexpectedly from trusted sources. This vulnerability could be exploited when a user opens a specially crafted file.
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FAQ for Visio Index Calculation Memory Corruption Vulnerability - CVE-2010-0256

What is the scope of the vulnerability?
This is a remote code execution vulnerability. 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.

What causes the vulnerability?
The vulnerability exists in the way Microsoft Office Visio handles memory when opening specially crafted Visio files.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could run arbitrary code as the logged-on user. If a user is logged on with administrative user rights, an attacker could take complete control of the 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.

How could an attacker exploit the vulnerability?
This vulnerability requires that a user open a specially crafted Visio file with an affected version of Microsoft Office Visio.

In an e-mail attack scenario, an attacker could exploit the vulnerability by sending a specially crafted Visio file to the user and by convincing the user to open the file.

In a Web-based attack scenario, an attacker would have to host a Web site that contains a specially crafted Visio file that is used to attempt to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content could contain specially crafted content that could exploit this vulnerability. An attacker would have no way to force users to visit a specially crafted Web site. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link that takes them to the attacker's site.

What systems are primarily at risk from the vulnerability?
Systems where Microsoft Office Visio is used, including workstations and terminal servers, are primarily at risk. Servers could be at more risk if administrators allow users to log on to servers and to run programs. However, best practices strongly discourage allowing this.

What does the update do?
This update addresses the vulnerability by correcting the way that Microsoft Office Visio calculates indexes when opening specially crafted Visio files.

When this security bulletin was issued, had this vulnerability been publicly disclosed?
No. Microsoft received information about this vulnerability through responsible disclosure.

When this security bulletin was issued, had Microsoft received any reports that this vulnerability was being exploited?
No. Microsoft had not received any information to indicate that this vulnerability had been publicly used to attack customers and had not seen any examples of proof of concept code published when this security bulletin was originally issued.

Other Information
Acknowledgments

Microsoft thanks the following for working with us to help protect customers:


Bing Liu of Fortinet's FortiGuard Labs for reporting the Visio Attribute Validation Memory Corruption Vulnerability (CVE-2010-0254)


Bing Liu of Fortinet's FortiGuard Labs for reporting the Visio Index Calculation Memory Corruption Vulnerability (CVE-2010-0256)
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Microsoft Active Protections Program (MAPP)

To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.

Support


Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.


International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions


V1.0 (April 13, 2010): Bulletin published.

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