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AUSCERT External Security Bulletin Redistribution
ESB-2016.1491
MS16-068 - Cumulative Security Update for Microsoft Edge (3163656)
15 June 2016
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AusCERT Security Bulletin Summary
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Product: Microsoft Edge
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2016-3222 CVE-2016-3215 CVE-2016-3214
CVE-2016-3203 CVE-2016-3202 CVE-2016-3201
CVE-2016-3199 CVE-2016-3198
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-068
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MS16-068 - Cumulative Security Update for Microsoft Edge (3163656)
Executive Summary
This security update resolves vulnerabilities in Microsoft Edge. The most
severe of the vulnerabilities could allow remote code execution if a user
views a specially crafted webpage using Microsoft Edge. An attacker who
successfully exploited the vulnerabilities could gain the same user rights as
the current user. Customers whose accounts are configured to have fewer user
rights on the system could be less impacted than users with administrative
user rights.
This security update is rated Critical for Microsoft Edge on Windows 10.
Affected Software
Microsoft Edge
Vulnerability Information
Microsoft Edge Security Feature Bypass - CVE-2016-3198
A security feature bypass exists in Microsoft Edge when the Edge Content
Security Policy (CSP) fails to properly validate certain specially crafted
documents. An attacker who exploited the bypass could trick a user into
loading a page containing malicious content.
To exploit the bypass, an attacker must trick a user into either loading a
page containing malicious content or visiting a malicious website. The
attacker could also inject the malicious page into either a compromised
website or an advertisement network. The update addresses the bypass by
correcting how the Edge CSP validates documents.
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
Microsoft Edge Security Feature Bypass CVE-2016-3198 No No
Multiple Scripting Engine Memory Corruption Vulnerabilities
Multiple remote code execution vulnerabilities exist in the way that the
Chakra JavaScript engine renders when handling objects in memory in Microsoft
Edge. The vulnerabilities could corrupt memory in such a way that an attacker
could execute arbitrary code in the context of the current user. An attacker
who successfully exploited the vulnerabilities could gain the same user rights
as the current user. If the current user is logged on with administrative user
rights, an attacker who successfully exploited the vulnerabilities could take
control of an affected system. An attacker could then install programs; view,
change, or delete data; or create new accounts with full user rights.
In a web-based attack scenario, an attacker could host a specially crafted
website that is designed to exploit the vulnerabilities through Microsoft Edge
and then convince a user to view the website. An attacker could also embed an
ActiveX control marked "safe for initialization" in an application or
Microsoft Office document that hosts the Edge rendering engine. The attacker
could also take advantage of compromised websites, and websites that accept or
host user-provided content or advertisements. These websites could contain
specially crafted content that could exploit the vulnerabilities. The update
addresses the vulnerabilities by modifying how the Chakra JavaScript scripting
engine handles objects in memory.
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
Scripting Engine Memory Corruption Vulnerability CVE-2016-3199 No No
Scripting Engine Memory Corruption Vulnerability CVE-2016-3202 No No
Scripting Engine Memory Corruption Vulnerability CVE-2016-3214 No No
Microsoft Edge Memory Corruption Vulnerability CVE-2016-3222 Yes No
Multiple Windows PDF Information Disclosure Vulnerabilities
Information disclosure vulnerabilities exist in Microsoft Windows when a user
opens a specially crafted .pdf file. An attacker who successfully exploited
the vulnerabilities could read information in the context of the current user.
To exploit the vulnerabilities, an attacker would have to trick the user into
opening the .pdf file. The update addresses the vulnerabilities by modifying
how Windows parses .pdf 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 PDF Information Disclosure Vulnerability CVE-2016-3201 No No
Windows PDF Information Disclosure Vulnerability CVE-2016-3215 No No
Windows PDF Remote Code Execution Vulnerability - CVE-2016-3203
A remote code execution vulnerability exists in Microsoft Windows if a user
opens a specially crafted .pdf file. An attacker who successfully exploited
the vulnerability could cause arbitrary code to execute in the context of the
current user.
To exploit the vulnerability, an attacker must entice the user to open a
specially crafted .pdf file. The update addresses the vulnerabilities by
modifying how Windows parses .pdf 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 PDF Remote Code Execution Vulnerability CVE-2016-3203 No No
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