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AUSCERT External Security Bulletin Redistribution
ESB-2017.0668
MS17-017 - Important: Security Update for Windows Kernel (4013081)
15 March 2017
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AusCERT Security Bulletin Summary
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Product: Microsoft Windows Kernel
Publisher: Microsoft
Operating System: Windows
Impact/Access: Administrator Compromise -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2017-0103 CVE-2017-0102 CVE-2017-0101
CVE-2017-0050
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS17-017
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Microsoft Security Bulletin MS17-017: Security Update for Windows Kernel
(4013081)
Bulletin Number: MS17-017
Bulletin Title: Security Update for Windows Kernel
Severity: Important
KB Article: 4013081
Version: 1.0
Published Date: 14/03/2017
Executive Summary
This security update resolves vulnerabilities in Microsoft Windows. The
vulnerabilities could allow elevation of privilege if an attacker runs a
specially crafted application.
This security update is rated Important for all supported releases of
Microsoft Windows. For more information, see the Affected Software and
Vulnerability Severity Ratings section.
The security update addresses the vulnerability by helping to ensure that the
Windows Kernel API properly enforces permissions. For more information about
the vulnerability, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article
4013081.
Affected Software
Windows Vista
Windows Server 2008
Windows 7
Windows Server 2008 R2
Windows 8.1
Windows Server 2012
Windows Server 2012 R2
Windows RT 8.1
Windows 10
Windows Server 2016
Vulnerability Information
Windows Kernel Elevation of Privilege Vulnerability CVE-2017-0050
An elevation of privilege vulnerability exists in the way that the Windows
Kernel API enforces permissions. An attacker who successfully exploited the
vulnerability could run processes in an elevated context.
To exploit the vulnerability, a locally authenticated attacker could run a
specially crafted application.
The security update addresses the vulnerability by correcting how the Windows
Kernel API validates input.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Windows Elevation of Privilege Vulnerability - CVE-2017-0101
An elevation of privilege vulnerability exists when the Windows Transaction
Manager improperly handles objects in memory. An attacker who successfully
exploited this vulnerability could run processes in an elevated context.
In a local attack scenario, an attacker could exploit this vulnerability by
running a specially crafted application to take complete control over the
affected system.
The update addresses the vulnerability by correcting how the Transaction
Manager handles objects in memory.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Windows Elevation of Privilege Vulnerability CVE-2017-0102
An elevation of privilege vulnerability exists when Windows fails to check the
length of a buffer prior to copying memory to it. An attacker who successfully
exploited the vulnerability could gain elevated privileges on a targeted
system.
To exploit the vulnerability, an attacker would first need access to the
target system and have the ability to copy a file to a shared folder or drive.
The security update addresses the vulnerability by correcting the way that
Windows validates the buffer lengths.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Windows Registry Elevation of Privilege Vulnerability CVE-2017-0103
An elevation of privilege vulnerability exists when the Windows Kernel API
improperly handles registry objects in memory. An attacker who successfully
exploited the vulnerability could gain elevated privileges on a targeted
system.
A locally-authenticated attacker could exploit this vulnerability by running a
specially crafted application.
The security update addresses the vulnerability by helping to ensure that the
Windows Kernel API properly handles objects in memory.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
Microsoft has not identified any workarounds for this vulnerability.
Security Update Deployment
For Security Update Deployment information, see the Microsoft Knowledge Base
article referenced here in the Executive Summary.
Acknowledgments
Microsoft recognizes the efforts of those in the security community who help
us protect customers through coordinated vulnerability disclosure. See
Acknowledgments for more information.
Disclaimer
The information provided in the Microsoft Knowledge Base is provided "as is"
without warranty of any kind. Microsoft disclaims all warranties, either
express or implied, including the warranties of merchantability and fitness
for a particular purpose. In no event shall Microsoft Corporation or its
suppliers be liable for any damages whatsoever including direct, indirect,
incidental, consequential, loss of business profits or special damages, even
if Microsoft Corporation or its suppliers have been advised of the possibility
of such damages. Some states do not allow the exclusion or limitation of
liability for consequential or incidental damages so the foregoing limitation
may not apply.
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