MS16-012: Security update for Microsoft Windows PDF Library to address remote code execution: February 9, 2016

Summary
This security update resolves vulnerabilities in Microsoft Windows. The more severe of the vulnerabilities could allow remote code execution if Microsoft Windows PDF Library incorrectly handles application programming interface (API) calls. This could allow an attacker to run arbitrary code on the user’s system. An attacker who successfully exploited the vulnerabilities could gain the same user rights as the current user. Customers whose accounts are configured to have fewer user rights on the system could be less affected than those who operate with administrative user rights. However, an attacker would be unable to force users to download or open a malicious PDF document.

To learn more about the vulnerability, see Microsoft Security Bulletin MS16-012.
More information
Important
  • All future security and nonsecurity updates for Windows 8.1, and Windows Server 2012 R2 require update 2919355 to be installed. We recommend that you install update 2919355 on your Windows 8.1-based, or Windows Server 2012 R2-based computer so that you receive future updates.
  • If you install a language pack after you install this update, you must reinstall this update. Therefore, we recommend that you install any language packs that you need before you install this update. For more information, see Add language packs to Windows.
Additional information about this security update
The following articles contain additional information about this security update as it relates to individual product versions. The articles may contain known issue information.
  • 3123294 MS16-012: Description of the security update for Windows PDF Library: February 9, 2016
  • 3135174 Cumulative Update for Windows 10: February 9, 2016
How to obtain and install the update

Method 1: Windows Update

This update is available through Windows Update. When you turn on automatic updating, this update will be downloaded and installed automatically. For more information about how to turn on automatic updating, seeGet security updates automatically.

Method 2: Microsoft Download Center

You can obtain the stand-alone update package through the Microsoft Download Center. Follow the installation instructions on the download page to install the update.

Click the download link in Microsoft Security Bulletin MS16-012 that corresponds to the version of Windows that you are running.
More information

Security update deployment information

Windows 8.1 (all editions)

Reference Table

The following table contains the security update information for this software.
Security update file nameFor all supported 32-bit editions of Windows 8.1:
Windows8.1-KB3123294-x86.msu
For all supported x64-based editions of Windows 8.1:
Windows8.1-KB3123294-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementIn some cases, this update does not require a system restart. If the required files are being used, this update will require a system restart. If this behavior occurs, you receive a message that advises you to restart your system.
Removal informationTo uninstall an update installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click Windows Update, and under See also, click Installed updates, and then select from the list of updates.
File informationSee Microsoft Knowledge Base Article 3123294
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows Server 2012 and Windows Server 2012 R2 (all editions)

Reference Table

The following table contains the security update information for this software.
Security update file nameFor all supported editions of Windows Server 2012:
Windows8-RT-KB3123294-x64.msu
For all supported editions of Windows Server 2012 R2:
Windows8.1-KB3123294-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementIn some cases, this update does not require a system restart. If the required files are being used, this update will require a system restart. If this behavior occurs, you receive a message that advises you to restart your system.
Removal informationTo uninstall an update installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click Windows Update, and under See also, click Installed updates, and then select from the list of updates.
File informationSee Microsoft Knowledge Base Article 3123294
Registry key verificationNote A registry key does not exist to validate the presence of this update.

Windows 10 (all editions)

Reference Table

The following table contains the security update information for this software.
Security update file nameFor all supported 32-bit editions of Windows 10:
Windows10.0-KB3135174-x86.msu
For all supported x64-based editions of Windows 10:
Windows10.0-KB3135174-x64.msu
Installation switchesSee Microsoft Knowledge Base Article 934307
Restart requirementIn some cases, this update does not require a system restart. If the required files are being used, this update will require a system restart. If this behavior occurs, you receive a message that advises you to restart your system. For more information about the reasons why you may be prompted to restart, see Microsoft Knowledge Base Article 887012.
Removal informationTo uninstall an update installed by WUSA, use the /Uninstall setup switch. Or, click Control Panel, click System and Security, click Windows Update, and under See also, click Installed updates, and then select from the list of updates.
File informationSee Microsoft Knowledge Base Article 3135174
Registry key verificationNote A registry key does not exist to validate the presence of this update.

How to obtain help and support for this security update

Help for installing updates: Support for Microsoft Update

Security solutions for IT professionals: TechNet Security Troubleshooting and Support

Help for protecting your Windows-based computer from viruses and malware: Virus Solution and Security Center

Local support according to your country: International Support
malicious attacker exploit
Properties

Article ID: 3138938 - Last Review: 02/09/2016 18:16:00 - Revision: 1.0

Windows 10, Windows Server 2012 R2 Datacenter, Windows Server 2012 R2 Standard, Windows Server 2012 R2 Essentials, Windows Server 2012 R2 Foundation, Windows 8.1 Enterprise, Windows 8.1 Pro, Windows 8.1, Windows Server 2012 Datacenter, Windows Server 2012 Standard, Windows Server 2012 Essentials, Windows Server 2012 Foundation

  • atdownload kbbug kbexpertiseinter kbfix kbsecbulletin kbsecurity kbsecvulnerability KB3138938
Feedback