SecurityvulnsSECURITYVULNS:DOC:24012Microsoft Security Bulletin MS10-033 - Critical Vulnerabilities in Media Decompression Could Allow Remote Code Execution (979902)
Microsoft Security Bulletin MS10-033 - Critical
Vulnerabilities in Media Decompression Could Allow Remote Code Execution (979902)
Published: June 08, 2010
Version: 1.0
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities in Microsoft Windows. These vulnerabilities could allow remote code execution if a user opens a specially crafted media file or receives specially crafted streaming content from a Web site or any application that delivers Web content. 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 Critical for Quartz.dll (DirectShow) on Microsoft Windows 2000, Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008; Critical for Windows Media Format Runtime on Microsoft Windows 2000, Windows XP, and Windows Server 2003; Critical for Asycfilt.dll (COM component) on Microsoft Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2; and Important for Windows Media Encoder 9 x86 and x64 on Microsoft Windows 2000, Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerabilities by modifying the way that Windows parses media files. For more information about the vulnerabilities, 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 apply the update immediately 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 Component Maximum Security Impact Aggregate Severity Rating Bulletins Replaced by this Update
Microsoft Windows 2000
Microsoft Windows 2000 Service Pack 4
Quartz.dll (DirectShow) (DirectX 9)[1]
(KB975562)
Remote Code Execution
Critical
MS09-028
Microsoft Windows 2000 Service Pack 4
Windows Media Format Runtime 9[2]
(KB978695)
Remote Code Execution
Critical
None
Microsoft Windows 2000 Service Pack 4
Windows Media Encoder 9 x86
(KB979332)
Remote Code Execution
Important
None
Microsoft Windows 2000 Service Pack 4
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows XP
Windows XP Service Pack 2 and Windows XP Service Pack 3
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS09-028
Windows XP Service Pack 2
Windows Media Format Runtime 9, Windows Media Format Runtime 9.5 and Windows Media Format Runtime 11
(KB978695)
Remote Code Execution
Critical
MS09-047
Windows XP Service Pack 3
Windows Media Format Runtime 9, Windows Media Format Runtime 9.5 and Windows Media Format Runtime 11
(KB978695)
Remote Code Execution
Critical
MS09-047
Windows XP Service Pack 2 and Windows XP Service Pack 3
Windows Media Encoder 9 x86
(KB979332)
Remote Code Execution
Important
None
Windows XP Service Pack 2 and Windows XP Service Pack 3
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows XP Professional x64 Edition Service Pack 2
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS09-028
Windows XP Professional x64 Edition Service Pack 2
Windows Media Format Runtime 9.5
(KB978695)
Windows Media Format Runtime 9.5 x64 Edition[3]
(KB978695)
Windows Media Format Runtime 11
(KB978695)
Remote Code Execution
Critical
MS09-047
Windows XP Professional x64 Edition Service Pack 2
Windows Media Encoder 9 x86
(KB979332)
Windows Media Encoder 9 x64
(KB979332)
Remote Code Execution
Important
None
Windows XP Professional x64 Edition Service Pack 2
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows Server 2003
Windows Server 2003 Service Pack 2
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS09-028
Windows Server 2003 Service Pack 2
Windows Media Format Runtime 9.5
(KB978695)
Remote Code Execution
Critical
MS09-047
Windows Server 2003 Service Pack 2
Windows Media Encoder 9 x86
(KB979332)
Remote Code Execution
Important
None
Windows Server 2003 Service Pack 2
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows Server 2003 x64 Edition Service Pack 2
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS09-028
Windows Server 2003 x64 Edition Service Pack 2
Windows Media Format Runtime 9.5
(KB978695)
Windows Media Format Runtime 9.5 x64 Edition[3]
(KB978695)
Remote Code Execution
Critical
MS09-047
Windows Server 2003 x64 Edition Service Pack 2
Windows Media Encoder 9 x86
(KB979332)
Windows Media Encoder 9 x64
(KB979332)
Remote Code Execution
Important
None
Windows Server 2003 x64 Edition Service Pack 2
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows Server 2003 with SP2 for Itanium-based Systems
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS09-028
Windows Server 2003 with SP2 for Itanium-based Systems
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows Vista
Windows Vista Service Pack 1
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS08-033
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Windows Media Encoder 9 x86
(KB979332)
Remote Code Execution
Important
None
Windows Vista x64 Edition Service Pack 1
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS08-033
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Windows Media Encoder 9 x86
(KB979332)
Windows Media Encoder 9 x64
(KB979332)
Remote Code Execution
Important
None
Windows Server 2008
Windows Server 2008 for 32-bit Systems
Quartz.dll (DirectShow)**
(KB975562)
Remote Code Execution
Critical
MS08-033
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2
Asycfilt.dll (COM component)*
(KB979482)
Remote Code Execution
Critical
None
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Media Encoder 9 x86**
(KB979332)
Remote Code Execution
Important
None
Windows Server 2008 for x64-based Systems
Quartz.dll (DirectShow)**
(KB975562)
Remote Code Execution
Critical
MS08-033
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2
Asycfilt.dll (COM component)*
(KB979482)
Remote Code Execution
Critical
None
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2
Windows Media Encoder 9 x86**
(KB979332)
Windows Media Encoder 9 x64**
(KB979332)
Remote Code Execution
Important
None
Windows Server 2008 for Itanium-based Systems
Quartz.dll (DirectShow)
(KB975562)
Remote Code Execution
Critical
MS08-033
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows 7
Windows 7 for 32-bit Systems
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows 7 for x64-based Systems
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
Windows Server 2008 R2
Windows Server 2008 R2 for x64-based Systems
Asycfilt.dll (COM component)*
(KB979482)
Remote Code Execution
Critical
None
Windows Server 2008 R2 for Itanium-based Systems
Asycfilt.dll (COM component)
(KB979482)
Remote Code Execution
Critical
None
*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. For more information on this installation option, see the MSDN articles, Server Core and Server Core for Windows Server 2008 R2. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.
**Server Core installation not affected. The vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, when installed using the Server Core installation option. For more information on this installation option, see the MSDN articles, Server Core and Server Core for Windows Server 2008 R2. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.
[1]The update for Quartz.dll (Direct Show) (DirectX 9) also applies to DirectX 9.0a, DirectX 9.0b, and DirectX 9.0c.
[2]There are two versions of the Windows Media Format Runtime for Microsoft Windows 2000. This update applies only to the supported Loki (L) version. Customers who have the Non-Loki (NL) version should upgrade to the supported Loki version of Windows Media Format Runtime. For more information, see Microsoft Knowledge Base Article 974316.
[3]If you have installed Windows Media Format Runtime 9.5 x64 Edition out-of-band, you must apply the Windows Media Format Runtime 9.5 and Windows Media Format Runtime 9.5 x64 Edition security updates in order to be fully protected from the vulnerability discussed in this bulletin.
Non-Affected Software
Operating System Component
Microsoft Windows Server 2000 Service Pack 4
DirectX 7
All supported editions
Microsoft Expression Encoder 3
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Frequently Asked Questions (FAQ) Related to This Security Update
How do I determine which version of DirectX is installed on my system?
For information regarding the determination of which version of DirectX is on your system, see Microsoft Knowledge Base Article 157730.
Note You may not need to determine which version of DirectX is installed on your system; rather, you should apply the updates that apply to your version of Microsoft Windows.
I have Windows 7; do I need to update Windows Media Encoder?
This update for Windows Media Encoder 9 (KB979332) was designed for Windows Vista and earlier operating systems. Microsoft does not support Windows Media Encoder 9 on Windows 7. If you wish to continue using encoding functionality, you should plan to migrate to the free replacement product, Microsoft Expression Encoder 3 Standard.
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 June bulletin summary. For more information, see Microsoft Exploitability Index.
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software Media Decompression Vulnerability - CVE- CVE-2010-1879 MJPEG Media Decompression Vulnerability – CVE-2010-1880 Aggregate Severity Rating
Quartz.dll (DirectShow)
Quartz.dll (DirectShow) (DirectX 9) when installed on Microsoft Windows 2000 Service Pack 4
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows XP Service Pack 2 and Windows XP Service Pack 3
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows XP Professional x64 Edition Service Pack 2
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows Server 2003 Service Pack 2
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows Server 2003 x64 Edition Service Pack 2
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows Vista Service Pack 1
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows Vista x64 Edition Service Pack 1
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows Server 2008 for 32-bit Systems**
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows Server 2008 for x64-based Systems**
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Quartz.dll (DirectShow) on Windows Server 2008 for Itanium-based Systems
Critical
Remote Code Execution
Critical
Remote Code Execution
Critical
Windows Media Format Runtime
Windows Media Format Runtime 9 on Microsoft Windows 2000 Service Pack 4
Critical
Remote Code Execution
Not applicable
Critical
Windows Media Format Runtime 9, Windows Media Format Runtime 9.5 and Windows Media Format Runtime 11 on Windows XP Service Pack 2 and Windows XP Service Pack 3
Critical
Remote Code Execution
Not applicable
Critical
Windows Media Format Runtime 9.5, Windows Media Format Runtime 9.5 x64 Edition and Windows Media Format Runtime 11 when installed on Windows XP Professional x64 Edition Service Pack 2
Critical
Remote Code Execution
Not applicable
Critical
Windows Media Format Runtime 9.5 when installed on Windows Server 2003 Service Pack 2
Critical
Remote Code Execution
Not applicable
Critical
Windows Media Format Runtime 9.5 and Windows Media Format Runtime 9.5 x64 Edition when installed on Windows Server 2003 x64 Edition Service Pack 2
Critical
Remote Code Execution
Not applicable
Critical
Windows Media Encoder 9
Windows Media Encoder 9 x86 when installed on Microsoft Windows 2000 Service Pack 4
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x86 when installed on Windows XP Service Pack 2 and Windows XP Service Pack 3
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x86 when installed on Windows XP Professional x64 Edition Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x64 when installed on Windows XP Professional x64 Edition Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x86 when installed on Windows Server 2003 Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x64 when installed on Windows Server 2003 Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x64 when installed on Windows Server 2003 x64 Edition Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x86 when installed on Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x86 when installed on Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x64 when installed on Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x86 when installed on Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2 **
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x86 when installed on Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2**
Important
Remote Code Execution
Not applicable
Important
Windows Media Encoder 9 x64 when installed on Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2**
Important
Remote Code Execution
Not applicable
Important
Asycfilt.dll (COM component)
Asycfilt.dll (COM component) on Microsoft Windows 2000 Service Pack 4
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows XP Service Pack 2 and Windows XP Service Pack 3
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows XP Professional x64 Edition Service Pack 2
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2003 Service Pack 2
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2003 x64 Edition Service Pack 2
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2003 with SP2 for Itanium-based Systems
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Vista Service Pack 1
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Vista x64 Edition Service Pack 1
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2*
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2*
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows 7 for 32-bit Systems
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows 7 for x64-based Systems
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2008 R2 for x64-based Systems*
Critical
Remote Code Execution
Not applicable
Critical
Asycfilt.dll (COM component) on Windows Server 2008 R2 for Itanium-based Systems
Critical
Remote Code Execution
Not applicable
Critical
*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. For more information on this installation option, see the MSDN articles, Server Core and Server Core for Windows Server 2008 R2. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.
**Server Core installation not affected. The vulnerabilities addressed by this update do not affect supported editions of Windows Server 2008 and Windows Server 2008 R2 when installed using the Server Core installation option. For more information on this installation option, see the MSDN articles, Server Core and Server Core for Windows Server 2008 R2. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.
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Media Decompression Vulnerability - CVE-2010-1879
A remote code execution vulnerability exists in the way that Microsoft Windows handles media files. This vulnerability could allow remote code execution if a user opened a specially crafted media file. If a user is logged on with administrative user rights, 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-2010-1879.
Mitigating Factors for Media Decompression Vulnerability - CVE-2010-1879
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:
•
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.
•
In a Web-based attack scenario, an attacker could host a Web site that contains a Web page that is used to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes users to the attacker’s Web site.
•
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.
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Workarounds for Media Decompression Vulnerability - CVE-2010-1879
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 decoding of MJPEG content in Quartz.dll on Microsoft Windows 2000, Windows XP, and Windows Server 2003
Create a backup copy of the registry keys by using a managed deployment script that contains the following commands:
regedit /e MJPEG_Decoder_Backup.reg HKEY_CLASSES_ROOT\CLSID\{301056D0-6DFF-11D2-9EEB-006008039E37}
Next, save the following to a file with a .REG extension, such as Disable_MJPEG_Decoder.reg:
Windows Registry Editor Version 5.00
[-HKEY_CLASSES_ROOT\CLSID\{301056D0-6DFF-11D2-9EEB-006008039E37}]
Run the above registry script on the target machine with the following command from an elevated command prompt:
Regedit.exe /s Disable_MJPEG_Decoder.reg
Impact of workaround: Disabling the decoding of MJPEG content will prevent playback.
How to undo the workaround. Run the above registry script on the target machine with the following command from an elevated command prompt:
Regedit.exe /s Disable_MJPEG_Decoder.reg
•
Modify the Access Control List for Windows Media Format Runtime (wmvcore.dll)
On Windows XP (all editions), run the following command from a command prompt (requires administrative privileges):
For 32-bit Windows:
cacls <PATH_AND_FILENAME> /E /P everyone:N
For 64-bit Windows:
cacls <64BIT_PATH_AND_FILENAME> /E /P everyone:N
Note Be sure to consider paths in 64-bit Windows such as %ProgramFiles(86)% and %windir%\SysWOW64.
How to undo the workaround. Run the following commands from a command prompt (requires administrative privileges).
On Windows XP (all editions):
For 32-bit Windows:
cacls <PATH_AND_FILENAME> /E /R everyone
For 64-bit Windows:
cacls <64BIT_PATH_AND_FILENAME> /E /R everyone
Note Be sure to consider paths in 64-bit Windows such as %ProgramFiles(86)% and %windir%\SysWOW64.
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FAQ for Media Decompression Vulnerability - CVE-2010-1879
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 remotely. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
What causes the vulnerability?
The Windows components for processing media files do not properly handle specially crafted compression data.
What is DirectX?
Microsoft DirectX is a feature of the Windows operating system. It is used for streaming media on Microsoft Windows operating systems to enable graphics and sound when playing games or watching video.
What is DirectShow?
DirectX consists of a set of low-level Application Programming Interfaces (APIs) used by Windows programs for multimedia support. Within DirectX, the DirectShow technology performs client-side audio and video sourcing, manipulation and rendering.
Microsoft DirectShow is used for streaming media on Microsoft Windows operating systems. DirectShow is used for high-quality capture and playback of multimedia streams. It automatically detects and uses video and audio acceleration hardware when available, but also supports systems without acceleration hardware. DirectShow is also integrated with other DirectX technologies. Some examples of applications that use DirectShow include DVD players, video editing applications, AVI to ASF converters, MP3 players, and digital video capture applications
What might an attacker use the vulnerability to do?
If a user is logged on with administrative user rights, 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.
How could an attacker exploit the vulnerability?
Exploitation of this vulnerability requires that a user open a specially crafted media file or receive specially crafted streaming content from a Web site or any application that delivers Web content.
What systems are primarily at risk from the vulnerability?
For Direct Show, the vulnerability requires a user to open a specially crafted MJPEG video file.
For the Windows Media Format Runtime-based application, the vulnerability requires a user to open a specially crafted ASF file (having JPEG embedded) in any Windows Media Format Runtime-based application for any malicious action to occur.
For the Windows Media Encoder, the vulnerability requires a user to open a specially crafted JPEG file for encoding or open an already-created project file (.wma) with a specially crafted JPEG file embedded in it.
For the Asycfilt.dll (COM component), the vulnerability requires a user to open a specially crafted media file.
Any systems where any of these components are used frequently, 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 Windows parses media 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.
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MJPEG Media Decompression Vulnerability - CVE-2010-1880
A remote code execution vulnerability exists in the way that Microsoft Windows handles media files. This vulnerability could allow remote code execution if a user opened a specially crafted file. If a user is logged on with administrative user rights, 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-2010-1880.
Mitigating Factors for MJPEG Media Decompression Vulnerability - CVE-2010-1880
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:
•
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.
•
In a Web-based attack scenario, an attacker could host a Web site that contains a Web page that is used to exploit this vulnerability. In addition, compromised Web sites and Web sites that accept or host user-provided content or advertisements could contain specially crafted content that could exploit this vulnerability. In all cases, however, an attacker would have no way to force users to visit these Web sites. Instead, an attacker would have to convince users to visit the Web site, typically by getting them to click a link in an e-mail message or Instant Messenger message that takes users to the attacker’s Web site.
•
The vulnerability could not be exploited automatically through e-mail. For an attack to be successful a user must open an attachment this is sent in an e-mail message.
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Workarounds for MJPEG Media Decompression Vulnerability - CVE-2010-1880
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:
•
Upgrade Windows Media Encoder to Microsoft Expression Encoder 3
Microsoft Expression Encoder 3 is not affected by the vulnerabilities described in this bulletin. Expression Encoder is a professional encoding tool that offers enhancement, encoding, and publishing of rich video experiences with Microsoft Silverlight. Convert and compress multiple video formats to SMPTE standard VC-1 video or H.264 for mobile, Web, and HD video scenarios. For streamlined workflow, create branded templates with Expression Blend, and encode on the desktop or server to guarantee a consistent viewing experience on Windows, Mac, and devices. Download Microsoft Expression Encoder 3 Standard for Windows XP, Windows Vista, and Windows 7 here.
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Disable decoding of MJPEG content in Quartz.dll on Microsoft Windows 2000, Windows XP, Windows Server 2003, and Windows Server 2008
Create a backup copy of the registry keys by using a managed deployment script that contains the following commands:
regedit /e MJPEG_Decoder_Backup.reg HKEY_CLASSES_ROOT\CLSID\{301056D0-6DFF-11D2-9EEB-006008039E37}
Next, save the following to a file with a .REG extension, such as Disable_MJPEG_Decoder.reg:
Windows Registry Editor Version 5.00
[-HKEY_CLASSES_ROOT\CLSID\{301056D0-6DFF-11D2-9EEB-006008039E37}]
Run the above registry script on the target machine with the following command from an elevated command prompt:
Regedit.exe /s Disable_MJPEG_Decoder.reg
Impact of workaround: Disabling decoding of MJPEG content will prevent playback.
How to undo the workaround.
Run the above registry script on the target machine with the following command from an elevated command prompt:
Regedit.exe /s Disable_MJPEG_Decoder.reg
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FAQ for MJPEG Media Decompression Vulnerability - CVE-2010-1880
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 remotely. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
What causes the vulnerability?
The Windows components for processing media files do not properly handle specially crafted compression data.
What is DirectX?
Microsoft DirectX is a feature of the Windows operating system. It is used for streaming media on Microsoft Windows operating systems to enable graphics and sound when playing games or watching video.
What is DirectShow?
DirectX consists of a set of low-level Application Programming Interfaces (APIs) used by Windows programs for multimedia support. Within DirectX, the DirectShow technology performs client-side audio and video sourcing, manipulation and rendering.
Microsoft DirectShow is used for streaming media on Microsoft Windows operating systems. DirectShow is used for high-quality capture and playback of multimedia streams. It automatically detects and uses video and audio acceleration hardware when available, but also supports systems without acceleration hardware. DirectShow is also integrated with other DirectX technologies. Some examples of applications that use DirectShow include DVD players, video editing applications, AVI to ASF converters, MP3 players, and digital video capture applications
What might an attacker use the vulnerability to do?
If a user is logged on with administrative user rights, 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.
How could an attacker exploit the vulnerability?
Exploitation of this vulnerability requires that a user open a specially crafted media file or receive specially crafted streaming content from a Web site or any application that delivers Web content.
What systems are primarily at risk from the vulnerability?
This vulnerability requires a user to open a specially crafted MJPEG video file for any malicious action to occur. Any systems where these files are used frequently, 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 Windows parses media 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:
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Yamata Li of Palo Alto Networks for reporting an issue described in (CVE-2010-1879)
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Yamata Li of Palo Alto Networks for reporting an issue described in (CVE-2010-1880)
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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.
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Support
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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.
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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
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V1.0 (June 8, 2010): Bulletin published.
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