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AUSCERT External Security Bulletin Redistribution
ESB-2016.2387
Microsoft Security Bulletin MS16-120 - Critical Security
Update for Microsoft Graphics Component (3192884)
12 October 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Windows
Microsoft Office products
Skype for Business 2016
Microsoft Lync products
Microsoft .NET Framework
Microsoft Silverlight
Publisher: Microsoft
Operating System: Windows
Impact/Access: Administrator Compromise -- Remote with User Interaction
Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2016-7182 CVE-2016-3396 CVE-2016-3393
CVE-2016-3263 CVE-2016-3262 CVE-2016-3209
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-120
Comment: CVE-2016-3393 is being actively exploited in the wild.
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Microsoft Security Bulletin MS16-120 - Critical Security Update for Microsoft
Graphics Component (3192884)
Published: October 11, 2016
Version: 1.0
Executive Summary
This security update resolves vulnerabilities in Microsoft Windows, Microsoft
Office, Skype for Business, Silverlight and Microsoft Lync. The most serious
of these vulnerabilities could allow remote code execution if a user either
visits a specially crafted website or opens a specially crafted document.
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.
This security update is rated Critical for:
- - All supported releases of Microsoft Windows
This security update is rated Important for:
- - Affected editions of Microsoft Office 2007 and Microsoft Office 2010
- - Affected editions of Skype for Business 2016, Microsoft Lync 2013, and
Microsoft Lync 2010
- - Affected editions of Microsoft .NET Framework
- - Affected editions of Silverlight
The security update addresses the vulnerabilities by correcting how the
Windows font library handles embedded fonts.
Affected Software
Microsoft Windows
Microsoft .NET Framework
Microsoft Office 2007
Microsoft Office 2010
Microsoft Word Viewer
Skype for Business 2016
Microsoft Lync 2013
Microsoft Lync 2010
Microsoft Live Meeting 2007 Console
Microsoft Silverlight 5
Microsoft Silverlight 5 Developer Runtime
Vulnerability Information
Windows Graphics Component RCE Vulnerability CVE-2016-3393
A remote code execution vulnerability exists due to the way the Windows GDI
component handles objects in the memory. An attacker who successfully
exploited this vulnerability could take 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.
There are multiple ways an attacker could exploit this vulnerability:
- - In a web-based attack scenario, an attacker could host a specially crafted
website that is designed to exploit this vulnerability and then convince a
user to view the website. An attacker would have no way to force users to view
the attacker-controlled content. Instead, an attacker would have to convince
users to take action, typically by getting them to click a link in an email
message or in an Instant Messenger message that takes users to the attacker's
website, or by opening an attachment sent through email.
- - In a file sharing attack scenario, an attacker could provide a specially
crafted document file that is designed to exploit this vulnerability, and then
convince a user to open the document file.
The security update addresses the vulnerability by correcting how the Windows
GDI handles objects in the memory.
The following table contains a link to the standard entry for the
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
GDI+ Remote Code Execution Vulnerability CVE-2016-3393 No Yes
GDI+ Remote Code Execution Vulnerability CVE-2016-3396
A remote code execution vulnerability exists when the Windows font library
improperly handles specially crafted embedded fonts. An attacker who
successfully exploits this vulnerability could take 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.
There are multiple ways an attacker could exploit the vulnerability:
- - In a web-based attack scenario, an attacker could host a specially crafted
website that is designed to exploit the vulnerability and then convince users
to view the website. An attacker would have no way to force users to view the
attacker-controlled content. Instead, an attacker would have to convince users
to take action, typically by getting them to click a link in an email or
Instant Messenger message that takes users to the attacker's website, or by
opening an attachment sent through email.
- - In a file sharing attack scenario, an attacker could provide a specially
crafted document file that is designed to exploit the vulnerability, and then
convince users to open the document file. The security update addresses the
vulnerability by correcting how the Windows font library handles embedded
fonts.
In the Affected Software and Vulnerability Severity Ratings table for
Microsoft Office, the Preview Pane is an attack vector for CVE-2016-3396. The
security update addresses the vulnerability by correcting how the Windows font
library handles embedded fonts.
The following table contains a link to the standard entry for the
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
GDI+ Remote Code Execution Vulnerability CVE-2016-3396 No No
Multiple GDI+ Information Disclosure Vulnerabilities
Multiple information disclosure vulnerabilities exist in the way that the
Windows Graphics Device Interface (GDI) handles objects in memory, allowing an
attacker to retrieve information from a targeted system. An attacker who
successfully exploited these vulnerabilities could use the retrieved
information to circumvent Address Space Layout Randomization (ASLR) in
Windows, which helps guard against a broad class of vulnerabilities. By
itself, the information disclosures do not allow arbitrary code execution;
however, they could allow arbitrary code to be run if the attacker uses one in
combination with another vulnerability, such as a remote code execution
vulnerability, that can leverage the ASLR circumvention.
To exploit these vulnerabilities, an attacker would have to log on to an
affected system and run a specially crafted application.
The security update addresses the vulnerabilities, and helps protect the
integrity of the ASLR security feature, by correcting how GDI handles memory
addresses.
The following table contains links to the standard entry for the
vulnerabilities in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
GDI+ Information Disclosure Vulnerability CVE-2016-3209 No No
GDI+ Information Disclosure Vulnerability CVE-2016-3262 No No
GDI+ Information Disclosure Vulnerability CVE-2016-3263 No No
True Type Font Parsing Elevation of Privilege Vulnerability CVE-2016-7182
An elevation of privilege vulnerability exists when the Windows Graphics
Component improperly handles objects in memory. An attacker who successfully
exploits this vulnerability could run arbitrary code in kernel mode. An
attacker could then install programs; view, change, or delete data; or create
new accounts with full user rights.
The update addresses the vulnerability by correcting the way in which the
Microsoft Graphics Component handles objects in memory, preventing unintended
elevation from usermode.
The following table contains links to the standard entry for the vulnerability
in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
True Type Font Parsing Elevation of Privilege Vulnerability CVE-2016-7182 No No
True Type Font Parsing Elevation of Privilege Vulnerability CVE-2016-7182
An elevation of privilege vulnerability exists when the Windows Graphics
Component improperly handles objects in memory. An attacker who successfully
exploits this vulnerability could run arbitrary code in kernel mode. An
attacker could then install programs; view, change, or delete data; or create
new accounts with full user rights.
The update addresses the vulnerability by correcting the way in which the
Microsoft Graphics Component handles objects in memory, preventing unintended
elevation from usermode.
The following table contains links to the standard entry for the vulnerability
in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
True Type Font Parsing Elevation of Privilege Vulnerability CVE-2016-7182 No No
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