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Category:   OS (Microsoft)  >   Windows Drivers Vendors:   Microsoft
Windows Kernel-Mode Driver Bugs Let Local Users Obtain Potentially Sensitive Information and Gain Elevated Privileges
SecurityTracker Alert ID:  1031897
SecurityTracker URL:  http://securitytracker.com/id/1031897
CVE Reference:   CVE-2015-0077, CVE-2015-0078, CVE-2015-0094, CVE-2015-0095   (Links to External Site)
Date:  Mar 10 2015
Impact:   Disclosure of system information, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2003 SP2, Vista SP2, 2008 SP2, 7 SP1, 2008 R2 SP1, 8, 8.1, 2012, 2012 R2, RT, RT 8.1; and prior service packs
Description:   Multiple vulnerabilities were reported in Windows Kernel-Mode Driver. A local user can obtain elevated privileges on the target system. A local user can obtain potentially sensitive information.

The kernel-mode driver does not properly initialize function buffers [CVE-2015-0077]. A local user can exploit this to obtain administrative credentials.

The kernel-mode driver does not properly validate the calling thread's token [CVE-2015-0078]. A local user can exploit this to obtain administrative credentials.

The kernel-mode driver discloses private address information during a function call [CVE-2015-0094]. A local user can use this information in conjunction with a separate vulnerability to bypass Address Space Layout Randomization (ASLR) protections.

A local user can trigger a null pointer dereference to obtain kernel memory contents [CVE-2015-0095]. A local user can use this information in conjunction with a separate vulnerability to bypass Address Space Layout Randomization (ASLR) protections. Systems with NULL page mapping disabled [the default for Windows 8 and after] are not affected.

James Forshaw of Google Project Zero, Ashutosh Mehra of Adobe Systems Inc., WanderingGlitch (via HP's Zero Day Initiative), and KK reported these vulnerabilities.

Impact:   A local user can obtain elevated privileges on the target system.

A local user can obtain potentially sensitive information.

Solution:   The vendor has issued a fix.

A patch matrix is available in the vendor's advisory.

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms15-023

Vendor URL:  technet.microsoft.com/library/security/ms15-023 (Links to External Site)
Cause:   Access control error

Message History:   None.


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