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Category:   OS (Microsoft)  >   Windows Kernel Vendors:   Microsoft
Windows Kernel Bugs Let Local Users Modify Files and Obtain Potentially Sensitive Information
SecurityTracker Alert ID:  1036289
SecurityTracker URL:  http://securitytracker.com/id/1036289
CVE Reference:   CVE-2016-3258, CVE-2016-3272   (Links to External Site)
Date:  Jul 12 2016
Impact:   Disclosure of system information, Disclosure of user information, Modification of system information, Modification of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 8.1, 2012, 2012 R2, 10, 10 Version 1511
Description:   Two vulnerabilities were reported in Windows Kernel. A local user can obtain potentially sensitive information. A local user can modify files on the target system.

A local user that can exploit a separate vulnerability in a low integrity sandbox application can exploit time of check time of use (TOCTOU) flaws in file path-based security checks to modify files outside of the target low integrity level application [CVE-2016-3258].

A local user can run a specially crafted application to trigger a flaw in the handling of certain page fault system calls and obtain potentially sensitive information about the target process [CVE-2016-3272].

Herbert Bos of Vrije Universiteit Amsterdam and James Forshaw of Google Project Zero reported these vulnerabilities.

Impact:   A local user can obtain potentially sensitive information on the target system.

A local user can modify files on the target system.

Solution:   The vendor has issued a fix.

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms16-092

Vendor URL:  technet.microsoft.com/library/security/ms16-092 (Links to External Site)
Cause:   Access control error

Message History:   None.


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