MS15-015: Vulnerability in Microsoft Windows could allow elevation of privilege: February 10, 2015

Applies to: Windows Server 2012 R2 DatacenterWindows Server 2012 R2 StandardWindows Server 2012 R2 Essentials


This security update resolves a vulnerability in Microsoft Windows that could allow an attacker to take advantage of the lack of impersonation-level security checks to elevate privileges during process creation. An authenticated attacker who successfully exploited this vulnerability could obtain administrator credentials and use them to elevate privileges. An attacker could then do the following:
  • Install programs
  • View, change, or delete data
  • Create new accounts that have full administrative rights


Microsoft has released security bulletin MS15-015. To learn more about this security bulletin:

How to obtain help and support for this security update

Help installing updates:
Support for Microsoft Update

Security solutions for IT professionals:
TechNet Security Troubleshooting and Support

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

Local support according to your country:
International Support

More Information

Known issues with this security update

  • This security update may cause some programs or games to fail if they rely on undocumented APIs or if they access operating system components in unsupported ways. Please contact the manufacturer of your program or game for more information.

    For information about how to contact the manufacturer, click the appropriate article number in the following list to view the article in the Microsoft Knowledge Base:

    Hardware and software vendor contact information, A-K

    Hardware and software vendor contact information, L-P

    Hardware and software vendor contact information, Q-Z

Child package behavior

Customers who install this security update may face a known issue in which error 1108 is generated in the Security event log instead of the usual 4688 audit event. To address this issue, update 3004375 must be installed together with this update (update 3031432). 

Note This issue was first encountered in security update 3023266 (MS15-001).

For Windows 7, Windows Server 2008 R2, Windows 8, and Windows Server 2012 customers

On Windows 7, Windows Server 2008 R2, Windows 8, and Windows Server 2012, update package 3004375 is installed together with update 3031432.

For Windows Update, Windows Server Update Services (WSUS), and Microsoft Catalog customers

Update 3004375 is installed automatically and transparently together with security update 3031432. Update 3004375 will appear separately in the list of installed updates when it is viewed in the Add or Remove Programs item in Control Panel. Installing both packages together requires only one restart.

For Download Center customers

To address the known issue, if you download and then install this security update from the Microsoft Download Center for Windows 7, Windows Server 2008 R2, Windows 8, or Windows Server 2012, you should select both update 3004375 and update 3031432. You must install both of these updates to address the known issue.

File information

The English (United States) version of this software update installs files that have the attributes that are listed in the following tables. The dates and times for these files are listed in Coordinated Universal Time (UTC). The dates and times for these files on your local computer are displayed in your local time and with your current daylight saving time (DST) bias. Additionally, the dates and times may change when you perform certain operations on the files.