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Category:   OS (Microsoft)  >   Windows Kernel Vendors:   Microsoft
Windows Kernel Bug in NtSetWindowLongPtr() Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1037155
SecurityTracker URL:
CVE Reference:   GENERIC-MAP-NOMATCH   (Links to External Site)
Date:  Nov 1 2016
Impact:   User access via local system
Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in the Windows Kernel. A local user can obtain elevated privileges on the target system.

A local user can invoke a specially crafted NtSetWindowLongPtr() 'win32k.sys' system call for the index GWLP_ID on a window handle with the GWL_STYLE property set to WS_CHILD to execute arbitrary code on the target system with elevated privileges.

[Editor's note: This vulnerability is being actively exploited in conjunction with the Adobe Flash Player identified by CVE-2016-7855 (see Alert ID 1037111) to bypass sandbox restrictions and remotely execute arbitrary code.]

The vendor was notified on October 21, 2016.

The original advisory is available at:

Neel Mehta and Billy Leonard from Google Threat Analysis Group reported this vulnerability.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   No solution was available at the time of this entry.
Vendor URL: (Links to External Site)
Cause:   Not specified

Message History:   None.

 Source Message Contents

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