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Category:   OS (Microsoft)  >   Windows DLL (Any) Vendors:   Microsoft
Windows Input Method Editor Parameter Handling Bug Lets Local Users Gain Elevated Privileges
SecurityTracker Alert ID:  1039097
SecurityTracker URL:  http://securitytracker.com/id/1039097
CVE Reference:   CVE-2017-8591   (Links to External Site)
Date:  Aug 8 2017
Impact:   Execution of arbitrary code via local system, Root access via local system, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2012, 8.1, 2012 R2, RT 8.1, 10, 10 Version 1511, 2016, 10 Version 1607, 10 Version 1703
Description:   A vulnerability was reported in Windows Input Method Editor (IME). A local user can obtain elevated privileges on the target system.

A local user can run a specially crafted application that instantiates a DCOM class and exploits a parameter handling bug in Windows IME to execute arbitrary code on the target system with elevated privileges.

Systems with IME enabled or disabled are affected.

Microsoft Office Security Team reported this vulnerability.

Impact:   A local user can obtain elevated privileges on the target system.
Solution:   The vendor has issued a fix.

The Microsoft advisories are available at:

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8591
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034660
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034668
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034666
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034658
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034672
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034674
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034681
https://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB4034665

Vendor URL:  portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8591 (Links to External Site)
Cause:   Input validation error

Message History:   None.


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