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AUSCERT External Security Bulletin Redistribution
ESB-2016.2139
MS16-105 Cumulative Security Update for Microsoft Edge (3183043)
14 September 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Edge
Publisher: Microsoft
Operating System: Windows 10
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2016-3377 CVE-2016-3374 CVE-2016-3370
CVE-2016-3351 CVE-2016-3350 CVE-2016-3330
CVE-2016-3325 CVE-2016-3297 CVE-2016-3295
CVE-2016-3294 CVE-2016-3291 CVE-2016-3247
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-105
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MS16-105 Cumulative Security Update for Microsoft Edge (3183043)
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
Multiple Microsoft Edge Memory Corruption Vulnerabilities
Multiple remote code execution vulnerabilities exist in the way that Microsoft
Edge handles objects in memory. The vulnerabilities could corrupt memory in a
way that could allow an attacker to execute arbitrary code in the context of
the current user. An attacker who successfully exploited the vulnerability
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 security update addresses the vulnerabilities by modifying how Microsoft
Edge handles objects in memory.
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
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3247 No No
Microsoft Edge Memory Corruption Vulnerability CVE-2016-3294 No No
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3295 No No
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3297 No No
Microsoft Edge Memory Corruption Vulnerability CVE-2016-3330 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 security 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-2016-3350 No No
Scripting Engine Memory Corruption Vulnerability CVE-2016-3377 No No
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3291
An information disclosure vulnerability exists in the way that Microsoft Edge
handles cross-origin requests. An attacker who successfully exploited this
vulnerability could determine the origin of all of the web pages in the
affected browser.
In a web-based attack scenario, an attacker could host a website that is used
to attempt to exploit the vulnerability. Additionally, compromised websites
and websites that accept or host user-provided content could contain specially
crafted content that could be used to exploit the vulnerabilities. However, in
all cases an attacker would have no way to force users to view
attacker-controlled content. Instead, an attacker would have to convince users
to take action. For example, an attacker could trick users into clicking a
link that takes them to the attacker's site.
The security update addresses the vulnerability by correcting how Microsoft
Edge handles cross-origin resources.
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 Browser Information Disclosure Vulnerability CVE-2016-3291 No No
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3325
An information disclosure vulnerability exists in the way that certain
functions handle objects in memory. An attacker who successfully exploited the
vulnerabilities could obtain information to further compromise a target
system.
In a web-based attack scenario an attacker could host a website that is used
to attempt to exploit the vulnerabilities. Additionally, compromised websites
and websites that accept or host user-provided content could contain specially
crafted content that could be used to exploit the vulnerabilities. However, in
all cases an attacker would have no way to force users to view
attacker-controlled content. Instead, an attacker would have to convince users
to take action. For example, an attacker could trick users into clicking a
link that takes them to the attacker's site.
The security update addresses the vulnerability by correcting how certain
functions handle 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
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3325 No No
Multiple Information Disclosure Vulnerabilities
Multiple information disclosure vulnerabilities exist in the way that the
affected components handle objects in memory. An attacker who successfully
exploited the vulnerabilities could obtain information to further compromise a
target system.
In a web-based attack scenario an attacker could host a website that is used
to attempt to exploit the vulnerabilities. Additionally, compromised websites
and websites that accept or host user-provided content could contain specially
crafted content that could be used to exploit the vulnerabilities. However, in
all cases an attacker would have no way to force users to view
attacker-controlled content. Instead, an attacker would have to convince users
to take action. For example, an attacker could trick users into clicking a
link that takes them to the attacker's site.
The update addresses the vulnerabilities by correcting how the affected
components handle 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
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3351 No No
PDF Library Information Disclosure Vulnerability CVE-2016-3370 No No
PDF Library Information Disclosure Vulnerability CVE-2016-3374 No No
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