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AUSCERT External Security Bulletin Redistribution
ESB-2016.2138
MS16-104: Cumulative Security Update for Internet Explorer
(3183038) - Critical
14 September 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Microsoft Internet Explorer
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2016-3375 CVE-2016-3353 CVE-2016-3351
CVE-2016-3325 CVE-2016-3324 CVE-2016-3297
CVE-2016-3295 CVE-2016-3292 CVE-2016-3291
CVE-2016-3247
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-104
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MS16-104: Cumulative Security Update for Internet Explorer (3183038) -
Critical
Executive Summary
This security update resolves vulnerabilities in Internet Explorer. The most
severe of the vulnerabilities could allow remote code execution if a user
views a specially crafted webpage using Internet Explorer. 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 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.
This security update is rated Critical for Internet Explorer 9 (IE 9), and
Internet Explorer 11 (IE 11) on affected Windows clients, and Moderate for
Internet Explorer 9 (IE 9), Internet Explorer 10 (IE 10), and Internet
Explorer 11 (IE 11) on affected Windows servers.
Affected Software
Internet Explorer 9
Internet Explorer 10
Internet Explorer 11
Multiple Microsoft Internet Explorer Memory Corruption Vulnerabilities
Multiple remote code execution vulnerabilities exist in the way that Internet
Explorer accesses 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
vulnerabilities could gain the same user rights as the current user. If the
current user is logged on with administrative user rights, the attacker 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.
An attacker could host a specially crafted website that is designed to exploit
the vulnerabilities through Internet Explorer, and then convince a user to
view the website. The attacker could also take advantage of compromised
websites, or websites that accept or host user-provided content or
advertisements, by adding specially crafted content that could exploit the
vulnerabilities. In all cases, however, 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 via an enticement in email or
instant message, or by getting them to open an email attachment.
The update addresses the vulnerabilities by modifying how Internet Explorer
handles objects in memory.
The following table contains links to the standard entry for each
vulnerability in the Common Vulnerabilities and Exposures list:
Vulnerability Information
Vulnerability title CVE number Publicly disclosed Exploited
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3247 No No
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3295 No No
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3297 No No
Internet Explorer Memory Corruption Vulnerability CVE-2016-3324 No No
Scripting Engine Memory Corruption Vulnerability CVE-2016-3375
A remote code execution vulnerability exists in the way that the Microsoft OLE
Automation mechanism and the VBScript Scripting Engine in Internet Explorer
access objects in memory. The vulnerability 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, the attacker 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.
An attacker could host a specially crafted website that is designed to exploit
the vulnerability through Internet Explorer, and then convince a user to view
the website. The attacker could also take advantage of compromised websites,
or websites that accept or host user-provided content or advertisements, by
adding specially crafted content that could exploit the vulnerability. In all
cases, however, 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 via an enticement in email or instant message, or by
getting them to open an email attachment.
Note that you must install two updates to be protected from the Scripting
Engine Memory Corruption Vulnerability CVE-2016-3375: The update in this
bulletin, MS16-104, and the update in MS16-116. The updates address the
vulnerability by modifying how the Microsoft OLE Automation mechanism and the
VBScript Scripting Engine in Internet Explorer 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
Scripting Engine Memory Corruption Vulnerability CVE-2016-3375 No No
Internet Explorer Elevation of Privilege Vulnerability CVE-2016-3292
An elevation of privilege vulnerability exists when Internet Explorer fails a
check, allowing sandbox escape. An attacker who successfully exploited the
vulnerability could use the sandbox escape to elevate privileges on an
affected system. This vulnerability by itself does not allow arbitrary code
execution; however, it could allow arbitrary code to be run if the attacker
uses it in combination with one or more vulnerabilities (such as a remote code
execution vulnerability or another elevation of privilege vulnerability) that
is capable of leveraging the elevated privileges when code execution is
attempted.
The update addresses the vulnerability by correcting how Internet Explorer
handles zone and integrity settings.
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 Elevation of Privilege Vulnerability CVE-2016-3292 No No
Multiple Internet Explorer Information Disclosure Vulnerabilities
Multiple information disclosure vulnerabilities exist in the way that Internet
Explorer handles 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 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
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3351 No Yes
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3291
An information disclosure vulnerability exists in the way that affected
Microsoft browsers handle 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 vulnerabilities by correcting how affected
browsers handle 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
Internet Explorer Security Feature Bypass - CVE-2016-3353
A security feature bypass opportunity exists in the way that Internet Explorer
handles files from the Internet zone.
In a web-based attack scenario an attacker could host a malicious website that
is designed to exploit the security feature bypass. Alternatively, in an email
or instant message attack scenario, the attacker could send the targeted user
a specially crafted .URL file that is designed to exploit the bypass.
Additionally, compromised websites or websites that accept or host
user-provided content could contain specially crafted content that could be
used to exploit the security feature bypass. In all cases, however, 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 entice users into clicking a link that directs them to the
attacker's site or send a malicious attachment.
The update addresses the security feature by correcting how Internet Explorer
handles .URL 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
Internet Explorer Security Feature Bypass CVE-2016-3353 No No
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