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  Microsoft Paint integer overflow

From:MICROSOFT <secure_(at)_microsoft.com>
Date:10.02.2010
Subject:Microsoft Security Bulletin MS10-005 - Moderate Vulnerability in Microsoft Paint Could Allow Remote Code Execution (978706)

Microsoft Security Bulletin MS10-005 - Moderate
Vulnerability in Microsoft Paint Could Allow Remote Code Execution (978706)
Published: February 09, 2010

Version: 1.0
General Information
Executive Summary

This security update resolves a privately reported vulnerability in Microsoft Paint. The vulnerability could allow remote code execution if a user viewed a specially crafted JPEG image file using Microsoft Paint. 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 Moderate for Microsoft Windows 2000, Windows XP, and Windows Server 2003. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerability by modifying the way that Microsoft Paint decodes JPEG image 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.  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 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers consider applying the security update 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
Operating System Maximum Security Impact Aggregate Severity Rating Bulletins Replaced by this Update

Microsoft Windows 2000 Service Pack 4


Remote Code Execution


Moderate


None

Windows XP Service Pack 2 and Windows XP Service Pack 3


Remote Code Execution


Moderate


None

Windows XP Professional x64 Edition Service Pack 2


Remote Code Execution


Moderate


None

Windows Server 2003 Service Pack 2


Remote Code Execution


Moderate


None

Windows Server 2003 x64 Edition Service Pack 2


Remote Code Execution


Moderate


None

Windows Server 2003 with SP2 for Itanium-based Systems


Remote Code Execution


Moderate


None

Non-Affected Software
Operating System

Windows Vista, Windows Vista Service Pack 1, and Windows Vista Service Pack 2

Windows Vista x64 Edition, Windows Vista x64 Edition Service Pack 1, and Windows Vista x64 Edition Service Pack 2

Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2

Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2

Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2

Windows 7 for 32-bit Systems

Windows 7 for x64-based Systems

Windows Server 2008 R2 for x64-based Systems

Windows Server 2008 R2 for Itanium-based Systems
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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.

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 February bulletin summary. For more information, see Microsoft Exploitability Index.
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software MS Paint Integer Overflow Vulnerability - CVE-2010-0028 Aggregate Severity Rating

Microsoft Windows 2000 Service Pack 4


Moderate
Remote Code Execution


Moderate

Windows XP Service Pack 2 and Windows XP Service Pack 3


Moderate
Remote Code Execution


Moderate

Windows XP Professional x64 Edition Service Pack 2


Moderate
Remote Code Execution


Moderate

Windows Server 2003 Service Pack 2


Moderate
Remote Code Execution


Moderate

Windows Server 2003 x64 Edition Service Pack 2


Moderate
Remote Code Execution


Moderate

Windows Server 2003 with SP2 for Itanium-based Systems


Moderate
Remote Code Execution


Moderate
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MS Paint Integer Overflow Vulnerability - CVE-2010-0028

A remote code execution vulnerability exists in the way that Microsoft Paint decodes JPEG images. The vulnerability could allow remote code execution if a user opens a specially crafted JPEG image file in Microsoft Paint. 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.

To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2010-0028.

Mitigating Factors for MS Paint Integer Overflow Vulnerability - CVE-2010-0028

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:


By default, when a user double-clicks a JPEG file, the file will be opened in the Windows Picture and Fax Viewer. To exploit the vulnerability, an attacker must convince the user to open the specially crafted file in Microsoft Paint.


An attacker could send the specially crafted file as an e-mail attachment, but the attacker would have to convince the user to open the attachment in Microsoft Paint in order to exploit the vulnerability.


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 MS Paint Integer Overflow Vulnerability - CVE-2010-0028

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:


Disable Microsoft Paint

For 32-bit Windows, run the following command from a command prompt:

cacls %SystemRoot%\system32\mspaint.exe /E /P everyone:N

For 64-bit Windows, run the following command from a command prompt:

cacls %SystemRoot%\SysWOW64\mspaint.exe /E /P everyone:N

Impact of workaround.Users will not be able to run Microsoft Paint.

How to undo the workaround.

For 32-bit Windows, run the following command from a command prompt:

cacls %SystemRoot%\system32\mspaint.exe /E /R everyone

For 64-bit Windows, run the following command from a command prompt:

cacls %SystemRoot%\SysWOW64\mspaint.exe /E /R everyone



On Windows XP and Windows Server 2003, remove Microsoft Paint

1.


In Control Panel, open Add or Remove Programs.

2.


Click Add/Remove Windows Components.

3.


In the Windows Components Wizard, select Accessories and Utilities, and then click Details.

4.


Select Accessories, and then click Details.

5.


Click to clear the Paint check box, and then click OK twice.

6.


In the Windows Components Wizard, make sure that the Accessories and Utilities check box is grey, and then click Next.

7.


When the removal of files is completed, click Finish to exit the wizard.

Impact of workaround. Users will not be able to run Microsoft Paint.

How to undo the workaround. Reinstall Microsoft Paint using the Windows Components Wizard in Add or Remove Programs.
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FAQ for MS Paint Integer Overflow Vulnerability - CVE-2010-0028

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?
This vulnerability is caused by memory corruption when decoding JPEG images processed by Microsoft Paint.

What is Microsoft Paint?
Microsoft Paint is a tool used to create simple or elaborate drawings. In addition, Microsoft Paint can be used to view and edit scanned photos.

What are JPEG images?
JPEG is a platform-independent image format that supports a high level of compression. JPEG is a widely supported Internet standard developed by the Joint Photographic Experts Group.

What might an attacker use the vulnerability to do?
An attacker who successfully exploited this vulnerability could gain the same user rights 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 or view a specially crafted image file. An attacker would have to send a specially-crafted JPEG image file to the user and convince the user to open the file with Microsoft Paint.

What systems are primarily at risk from the vulnerability?
This vulnerability requires that a user is logged on and using Microsoft Paint to edit or view JPEG images for any malicious action to occur. Therefore, any systems where e-mail messages are read, where Internet Explorer is used frequently, or where users have network share access, such as workstations or terminal servers, are at the most risk from this vulnerability.

What does the update do?
The update removes the vulnerability by modifying the way that Microsoft Paint decodes JPEG image 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 when this security bulletin was originally issued.

Other Information
Acknowledgments

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


Tielei Wang of ICST-ERCIS (Engineering Research Center of Info Security, Institute of Computer Science & Technology, Peking University/China), working with Secunia, for reporting the MSPaint Integer Overflow Vulnerability (CVE-2010-0028)
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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 (February 9, 2010): Bulletin published.

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