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AUSCERT External Security Bulletin Redistribution
MS16-089 - Important: Security Update for Windows Secure
Kernel Mode (3170050)
13 July 2016
AusCERT Security Bulletin Summary
Product: Microsoft Windows
Operating System: Windows 10
Impact/Access: Access Confidential Data -- Existing Account
CVE Names: CVE-2016-3256
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Microsoft Security Bulletin MS16-089 - Important
Security Update for Windows Secure Kernel Mode (3170050)
Published: July 12, 2016
This security update resolves a vulnerability in Microsoft Windows. The
vulnerability could allow information disclosure when Windows Secure Kernel
Mode improperly handles objects in memory.
This security update is rated Important for all supported releases of Windows
10. For more information, see the Affected Software and Vulnerability Severity
The update addresses the vulnerability by correcting how Windows Secure Kernel
Mode handles objects in memory to prevent information disclosure.
Windows Secure Kernel Mode Information Disclosure Vulnerability CVE-2016-3256
An information disclosure vulnerability exists when Windows Secure Kernel Mode
improperly handles objects in memory. A locally-authenticated attacker who
successfully exploited this vulnerability could be able to read sensitive
information on the target system.
To exploit this vulnerability, an attacker could run a specially crafted
application on the target system. Note that the information disclosure
vulnerability by itself would not be sufficient for an attacker to compromise
a system. However, an attacker could combine this vulnerability with
additional vulnerabilities to further exploit the system. The update addresses
the vulnerability by correcting how Windows Secure Kernel Mode handles objects
Vulnerability Title CVE number Publicly disclosed Exploited
Windows Secure Kernel Mode Information Disclosure Vulnerability CVE-2016-3256 No No
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