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Category:   OS (Microsoft)  >   Windows Kernel Vendors:   Microsoft
Windows Kernel 'win32k.sys' Bugs Let Local Users Gain Elevated Privileges and Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1035532
SecurityTracker URL:  http://securitytracker.com/id/1035532
CVE Reference:   CVE-2016-0143, CVE-2016-0145, CVE-2016-0165, CVE-2016-0167   (Links to External Site)
Date:  Apr 13 2016
Impact:   Execution of arbitrary code via network, Root access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): Vista SP2, 2008 SP2, 7 SP1, 2008 R2 SP1, 8.1, 2012, 2012 R2, RT 8.1, 10; and prior service packs
Description:   Several vulnerabilities were reported in the Windows Kernel. A remote user can cause arbitrary code to be executed on the target user's system. A local user can gain system privileges on the target system.

A remote user can create a specially crafted font file that, when loaded by the target user, will trigger a flaw in the Windows font library in the processing of embedded fonts and execute arbitrary code on the target user's system [CVE-2016-0145]. The code will run with the privileges of the target user.

A local user can run a specially crafted program to trigger an object handling flaw in the Windows kernel-mode driver ('win32k.sys') to execute arbitrary code with kernel-level level privileges on the target system [CVE-2016-0143, CVE-2016-0165, CVE-2016-0167].

Anton Ivanov of Kaspersky Lab, Ben Hawkes of the Google Security Team, Dhanesh Kizhakkinan of FireEye, Inc., and Mateusz Jurczyk of Google Project Zero reported these vulnerabilities.

Impact:   A remote user can create content that, when loaded by the target user, will execute arbitrary code on the target user's system.

A local user can obtain kernel-mode privileges on the target system.

Solution:   The vendor has issued a fix.

Windows Vista Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=2350321c-7c6e-4e76-9fa1-06b3906d3ba8

Windows Vista x64 Edition Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=e293a8bc-45d4-4a93-93a9-cfbb18ca80fa

Windows Server 2008 for 32-bit Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=9fad9ae1-ea26-40e8-b861-9a8b0a399134

Windows Server 2008 for x64-based Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=71c4720b-a5cb-456f-bd51-920be9b1e53a

Windows Server 2008 for Itanium-based Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=ba86f043-2390-4ceb-bed0-6c16b1433bc4

Windows 7 for 32-bit Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=126dba8b-91ed-4981-a48b-ce7f80d5bb94

Windows 7 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=18c67970-0068-4faf-b2c8-8391a7ccb289

Windows Server 2008 R2 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=a0fbbb52-6d2e-4ee9-ab7c-00d4860a11c7

Windows Server 2008 R2 for Itanium-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=18c75e35-49e6-4839-bd53-649bf12384bb

Windows 8.1 for 32-bit Systems:

https://www.microsoft.com/downloads/details.aspx?familyid=669cd30d-d220-49b0-ad48-f251debabce4

Windows 8.1 for x64-based Systems:

https://www.microsoft.com/downloads/details.aspx?familyid=9d14fc68-41a1-464d-ac62-02771431af37

Windows Server 2012:

https://www.microsoft.com/downloads/details.aspx?familyid=ebf824a1-d6c9-4f0a-9fa5-1073434db026

Windows Server 2012 R2:

https://www.microsoft.com/downloads/details.aspx?familyid=9a321756-1fcb-45a2-b61d-b612778346b9

Windows Server 2008 for 32-bit Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=9fad9ae1-ea26-40e8-b861-9a8b0a399134

Windows Server 2008 for x64-based Systems Service Pack 2:

https://www.microsoft.com/downloads/details.aspx?familyid=71c4720b-a5cb-456f-bd51-920be9b1e53a

Windows Server 2008 R2 for x64-based Systems Service Pack 1:

https://www.microsoft.com/downloads/details.aspx?familyid=a0fbbb52-6d2e-4ee9-ab7c-00d4860a11c7

Windows Server 2012:

https://www.microsoft.com/downloads/details.aspx?familyid=ebf824a1-d6c9-4f0a-9fa5-1073434db026

Windows Server 2012 R2:

https://www.microsoft.com/downloads/details.aspx?familyid=9a321756-1fcb-45a2-b61d-b612778346b9

The Microsoft advisory is available at:

https://technet.microsoft.com/library/security/ms16-039

Vendor URL:  technet.microsoft.com/library/security/ms16-039 (Links to External Site)
Cause:   Access control error

Message History:   None.


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