Operating System:

[Win]

Published:

13 January 2016

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0079
         Microsoft Security Bulletin MS16-007: Security Update for
            Microsoft Windows to Address Remote Code Execution
                              13 January 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Microsoft Windows
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Existing Account      
                   Increased Privileges            -- Existing Account      
                   Unauthorised Access             -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-0020 CVE-2016-0019 CVE-2016-0018
                   CVE-2016-0016 CVE-2016-0015 CVE-2016-0014

Original Bulletin: 
   https://technet.microsoft.com/en-us/library/security/MS16-007

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Microsoft Security Bulletin MS16-007: Security Update for Microsoft Windows to
Address Remote Code Execution (3124901)

Document Metadata

Bulletin Number: MS16-007

Bulletin Title: Security Update for Microsoft Windows to Address Remote Code 
Execution

Severity: Important

KB Article: 3124901

Version: 1.0

Published Date: January 12, 2016

Executive Summary

This security update resolves vulnerabilities in Microsoft Windows. The most 
severe of the vulnerabilities could allow remote code execution if an attacker
is able to log on to a target system and run a specially crafted application.

Affected Software

Operating System

Windows Vista Service Pack 2 (3109560)

Windows Vista x64 Edition Service Pack 2

Windows Server 2008 for 32-bit Systems Service Pack 2

Windows Server 2008 for x64-based Systems Service Pack 2

Windows Server 2008 for Itanium-based Systems Service Pack 2

Windows 7 for 32-bit Systems Service Pack 1

Windows 7 for x64-based Systems Service Pack 1

Windows Server 2008 R2 for x64-based Systems Service Pack 1

Windows Server 2008 R2 for Itanium-based Systems Service Pack 1

Windows 8 for 32-bit Systems

Windows 8 for x64-based Systems

Windows 8.1 for 32-bit Systems

Windows 8.1 for x64-based Systems

Windows Server 2012

Windows Server 2012 R2

Windows RT[2]

Windows RT 8.1[2]

Windows 10 for 32-bit Systems[3]

Windows 10 for x64-based Systems[3]

Windows 10 Version 1511 for 32-bit Systems[3]

Windows 10 Version 1511 for x64-based Systems[3]

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)

[1]To be protected from this vulnerability on Windows 7 and Windows Server 
2008 R2 systems, in addition to installing this update customers must also 
install the 3124275 cumulative update for Internet Explorer 10 or Internet 
Explorer 11. See MS16-001 for download links.

[2]This update is only available via Windows Update.

[3]Windows 10 updates are cumulative. In addition to containing non-security 
updates, they also contain all of the security fixes for all of the Windows 
10-affected vulnerabilities shipping with the monthly security release. The 
update is available via the Windows Update Catalog.

Vulnerability Information

Multiple DLL Loading Elevation of Privilege Vulnerabilities

Multiple elevation of privilege vulnerabilities exist when Windows improperly
validates input before loading dynamic link library (DLL) files. An attacker 
who successfully exploited the vulnerabilities could elevate their privileges
on a targeted system.

To exploit the vulnerabilities, an attacker would first have to log on to the
target system. An attacker could then run a specially crafted application that
could exploit the vulnerabilities and take control over an affected system. 
The update addresses the vulnerabilities by correcting how Windows validates 
input before loading DLL files.

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

DLL Loading Elevation of Privilege Vulnerability 	CVE-2016-0014 	No 			No

MAPI DLL Loading Elevation of Privilege Vulnerability	CVE-2016-0020 	No 			No

DirectShow Heap Corruption Remote Code Execution Vulnerability - CVE-2016-0015

A remote code execution vulnerability exists when Microsoft DirectShow 
improperly validates user input. An attacker who successfully exploited this 
vulnerability could cause arbitrary code to execute in the context of the 
current user. If a user is logged on with administrative user rights, an 
attacker could take complete control of the affected system. An attacker could
then install programs; view, change, or delete data; or create new accounts 
with full user rights. Users whose accounts are configured to have fewer user
rights on the system could be less impacted than users who operate with 
administrative user rights.

For an attack to be successful, this vulnerability requires that a user open a
specially crafted file. In an email attack scenario, an attacker could exploit
the vulnerability by sending a specially crafted link to the user and by 
convincing the user to open it. The security update addresses the 
vulnerability by modifying how DirectShow validates user input.

Microsoft received information about the vulnerability through coordinated 
vulnerability disclosure. When this security bulletin was issued, Microsoft 
had not received any information to indicate that this vulnerability had been
publicly used to attack customers.

Multiple DLL Loading Remote Code Execution Vulnerabilities

Multiple remote code execution vulnerabilities exist when Windows improperly 
validates input before loading dynamic link library (DLL) files. An attacker 
who successfully exploited this vulnerability could take complete control of 
an affected system. An attacker could then install programs; view, change, or
delete data; or create new accounts with full user rights. Users whose 
accounts are configured to have fewer user rights on the system could be less
impacted than users who operate with administrative user rights.

To exploit the vulnerabilities, an attacker would first have to log on to the
target system and then run a specially crafted application. The updates 
address the vulnerabilities by correcting how Windows validates input before 
loading DLL files.

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 DLL Loading Remote Code Execution Vulnerability CVE-2016-0016 	Yes 			No

Windows DLL Loading Remote Code Execution Vulnerability CVE-2016-0018	Yes 			No

Windows Remote Desktop Protocol Security Bypass Vulnerability - CVE-2016-0019

A security feature bypass vulnerability exists in Windows Remote Desktop 
Protocol (RDP) that is caused when Windows 10 hosts running RDP services fail
to prevent remote logon to accounts that have no passwords set. An attacker 
who successfully exploited this vulnerability could gain access to the remote
host as another user, possibly with elevated privileges.

An attacker could exploit this vulnerability by using an older version of the
RDP client to connect to the Windows 10 host. Once connected, the attacker 
could generate a list of user accounts on the host and attempt to log on as 
those users. If one of the user accounts has no password set, then the 
attacker is allowed to log on as that user, despite the default system setting
that restricts access to accounts without passwords to local logon only. The 
security update addresses the vulnerability by enforcing the default setting 
of not allowing remote logon for accounts without passwords.

Microsoft received information about this vulnerability through coordinated 
vulnerability disclosure. At the time this security bulletin was originally 
issued, Microsoft was unaware of any attack attempting to exploit this 
vulnerability.

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