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AUSCERT External Security Bulletin Redistribution
ESB-2016.2148
Microsoft Security Bulletin MS16-114: Security Update for
Windows SMBv1 Server (3185879)
14 September 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2016-3345
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-114
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Microsoft Security Bulletin MS16-114: Security Update for Windows SMBv1 Server
(3185879)
Executive Summary
This security update resolves a vulnerability in Microsoft Windows. On Windows
Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2 operating
systems, the vulnerability could allow remote code execution if an
authenticated attacker sends specially crafted packets to an affected
Microsoft Server Message Block 1.0 (SMBv1) Server. The vulnerability does not
impact other SMB Server versions. Although later operating systems are
affected, the potential impact is denial of service.
This security update is rated Important for all supported releases of
Microsoft Windows.
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 2008 for 32-bit Systems Service Pack 2 (Server Core
installation)
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core
installation)
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core
installation)
Windows Server 2012 (Server Core installation)
Windows Server 2012 R2 (Server Core installation)
Vulnerability Information
Windows SMB Authenticated Remote Code Execution Vulnerability - CVE-2016-3345
For Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2
operating systems a remote code execution vulnerability exists in the way that
the Microsoft Server Message Block 1.0 (SMBv1) Server handles certain requests
when an authenticated attacker sends specially crafted packets to the SMBv1
server. The vulnerability does not impact other SMB Server versions.
On later operating systems an attacker who successfully exploited this
vulnerability could cause the affected system to stop responding until it is
manually restarted.
To exploit the vulnerability an attacker would first need to authenticate to
the SMBv1 Server and have permission to open files on the target server before
attempting the attack.
The security update addresses the vulnerability by correcting how the
Microsoft SMBv1 Server handles specially crafted requests.
The following table contains links to the standard entry for each
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
Windows SMB Authenticated Remote Code Execution Vulnerability CVE-2016-3345 No No
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