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AUSCERT External Security Bulletin Redistribution
ESB-2017.0661
MS17-010 - Critical: Security Update for Microsoft Windows
SMB Server (4013389)
15 March 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows SMB Server
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2017-0148 CVE-2017-0147 CVE-2017-0146
CVE-2017-0145 CVE-2017-0144 CVE-2017-0143
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS17-010
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Microsoft Security Bulletin MS17-010: Security Update for Windows SMB Server
(4013389)
Bulletin Number: MS17-010
Bulletin Title: Security Update for Microsoft Windows SMB Server
Severity: Critical
KB Article: 4013389
Version: 1.0
Published Date: 14/03/2017
Executive Summary
This security update resolves vulnerabilities in Microsoft Windows. The most
severe of the vulnerabilities could allow remote code execution if an attacker
sends specially crafted messages to a Windows SMBv1 server.
This security update is rated Critical for all supported releases of Microsoft
Windows. For more information, see the Affected Software and Vulnerability
Severity Ratings section.
The security update addresses the vulnerabilities by correcting how SMBv1
handles specially crafted requests.
For more information about the vulnerabilities, see the Vulnerability
Information section.
For more information about this update, see Microsoft Knowledge Base Article
4013078.
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
Multiple Windows SMB Remote Code Execution Vulnerabilities
Remote code execution vulnerabilities exist in the way that the Microsoft
Server Message Block 1.0 (SMBv1) server handles certain requests. An attacker
who successfully exploited the vulnerabilities could gain the ability to
execute code on the target server.
To exploit the vulnerability, in most situations, an unauthenticated attacker
could send a specially crafted packet to a targeted SMBv1 server.
The security update addresses the vulnerabilities by correcting how SMBv1
handles these specially crafted requests.
Mitigating Factors
Microsoft has not identified any mitigating factors for these vulnerabilities.
Workarounds
The following workarounds may be helpful in your situation:
Disable SMBv1
For customers running Windows Vista and later
See Microsoft Knowledge Base Article 2696547.
Alternative method for customers running Windows 8.1 or Windows Server 2012 R2
and later
For client operating systems:
a. Open Control Panel, click Programs, and then click Turn Windows features on
or off.
b. In the Windows Features window, clear the SMB1.0/CIFS File Sharing Support
checkbox, and then click OK to close the window.
c. Restart the system.
For server operating systems:
a. Open Server Manager and then click the Manage menu and select Remove Roles
and Features.
b. In the Features window, clear the SMB1.0/CIFS File Sharing Support
checkbox, and then click OK to close the window.
c. Restart the system.
Impact of workaround. The SMBv1 protocol will be disabled on the target
system.
How to undo the workaround. Retrace the workaround steps, instead restoring
the SMB1.0/CIFS File Sharing Support feature to an active state.
Windows SMB Information Disclosure Vulnerability CVE-2017-0147
An information disclosure vulnerability exists in the way that the Microsoft
Server Message Block 1.0 (SMBv1) server handles certain requests. An attacker
who successfully exploited this vulnerability could craft a special packet,
which could lead to information disclosure from the server.
To exploit the vulnerability, in most situations, an unauthenticated attacker
could send a specially crafted packet to a targeted SMBv1 server.
The security update addresses the vulnerability by correcting how SMBv1
handles these specially crafted requests.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
The following workarounds may be helpful in your situation:
Disable SMBv1
For customers running Windows Vista and later
See Microsoft Knowledge Base Article 2696547.
Alternative method for customers running Windows 8.1 or Windows Server 2012 R2
and later
For client operating systems:
a. Open Control Panel, click Programs, and then click Turn Windows features on
or off.
b. In the Windows Features window, clear the SMB1.0/CIFS File Sharing Support
checkbox, and then click OK to close the window.
c. Restart the system.
For server operating systems:
a. Open Server Manager and then click the Manage menu and select Remove Roles
and Features.
b. In the Features window, clear the SMB1.0/CIFS File Sharing Support
checkbox, and then click OK to close the window.
c. Restart the system.
Impact of workaround. The SMBv1 protocol will be disabled on the target
system.
How to undo the workaround. Retrace the workaround steps, instead restoring
the SMB1.0/CIFS File Sharing Support feature to an active state.
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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