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AUSCERT External Security Bulletin Redistribution
ESB-2016.2385
Microsoft Security Bulletin MS16-118 - Critical Cumulative
Security Update for Internet Explorer (3192887)
12 October 2016
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AusCERT Security Bulletin Summary
---------------------------------
Product: Internet Explorer
Publisher: Microsoft
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Increased Privileges -- Remote with User Interaction
Access Privileged Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2016-3390 CVE-2016-3388 CVE-2016-3387
CVE-2016-3385 CVE-2016-3384 CVE-2016-3383
CVE-2016-3382 CVE-2016-3331 CVE-2016-3298
CVE-2016-3267
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS16-118
Comment: CVE-2016-3298 is being actively exploited in the wild.
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Microsoft Security Bulletin MS16-118 - Critical Cumulative Security Update
for Internet Explorer (3192887)
Published: October 11, 2016
Version: 1.0
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
Vulnerability Information
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 title CVE number Publicly disclosed Exploited
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3331 No No
Microsoft Browser Memory Corruption Vulnerability CVE-2016-3383 No No
Internet Explorer Memory Corruption Vulnerability CVE-2016-3384 No No
Multiple Scripting Engine Memory Corruption Vulnerabilities
Multiple remote code execution vulnerabilities exist in the way that the
Scripting Engine renders when handling objects in memory in Microsoft
browsers. The vulnerabilities could corrupt memory in such a way that an
attacker could execute arbitrary code in the context of the current user.
In a web-based attack scenario, an attacker could host a specially crafted
website that is designed to exploit the vulnerabilities through Internet
Explorer or 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 scripting 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 Scripting Engine
handles objects in memory.
The following table contains links to the standard entry for each of the
vulnerabilities in the Common Vulnerabilities and Exposures list:
Vulnerability title CVE number Publicly disclosed Exploited
Scripting Engine Memory Corruption Vulnerability CVE-2016-3382 No No
Scripting Engine Memory Corruption Vulnerability CVE-2016-3385 No No
Scripting Engine Memory Corruption Vulnerability CVE-2016-3390 No No
Multiple Internet Explorer Elevation of Privilege Vulnerabilities
Multiple elevation of privilege vulnerabilities exist when Internet Explorer
or Edge fails to properly secure private namespace. An attacker who
successfully exploited this vulnerability could gain elevated permissions on
the namespace directory of a vulnerable system and gain elevated privileges.
The vulnerabilities by themselves do not allow arbitrary code to be run.
However, these vulnerabilities could be used in conjunction with one or more
other vulnerabilities (e.g. a remote code execution vulnerability and another
elevation of privilege) that could take advantage of the elevated privileges
when running.
The update addresses the vulnerabilities by correcting how Microsoft browsers
handle namespace boundaries.
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-2016-3387 No No
Microsoft Browser Elevation of Privilege Vulnerability CVE-2016-3388 No No
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3267
An information disclosure vulnerability exists when Internet Explorer or Edge
does not properly handle objects in memory. The vulnerability could allow an
attacker to detect specific files on the user's computer. In a web-based
attack scenario, an attacker could host a website that is used to attempt to
exploit the vulnerability.
In addition, compromised websites and websites that accept or host
user-generated content could contain specially crafted content that could
exploit the vulnerability. In all cases, however, an attacker would have no
way to force a user to view the 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.
An attacker who successfully exploited the vulnerability could potentially
read data that was not intended to be disclosed. Note that the vulnerability
would not allow an attacker to execute code or to elevate a users rights
directly, but the vulnerability could be used to obtain information in an
attempt to further compromise the affected browsers. The update addresses the
vulnerability by helping to restrict what information is returned to Internet
Explorer.
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-2016-3267 No No
Microsoft Browser Information Disclosure Vulnerability CVE-2016-3267
An information disclosure vulnerability exists when Internet Explorer or Edge
does not properly handle objects in memory. The vulnerability could allow an
attacker to detect specific files on the user's computer. In a web-based
attack scenario, an attacker could host a website that is used to attempt to
exploit the vulnerability.
In addition, compromised websites and websites that accept or host
user-generated content could contain specially crafted content that could
exploit the vulnerability. In all cases, however, an attacker would have no
way to force a user to view the 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.
An attacker who successfully exploited the vulnerability could potentially
read data that was not intended to be disclosed. Note that the vulnerability
would not allow an attacker to execute code or to elevate a users rights
directly, but the vulnerability could be used to obtain information in an
attempt to further compromise the affected browsers. The update addresses the
vulnerability by helping to restrict what information is returned to Internet
Explorer.
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-2016-3267 No No
Internet Explorer Information Disclosure Vulnerability CVE-2016-3298
An information disclosure vulnerability exists when Internet Explorer
improperly handles objects in memory. An attacker who successfully exploited
this vulnerability could test for the presence of files on disk. For an attack
to be successful an attacker must persuade a user to open a malicious website.
The update addresses the vulnerability by changing the way 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 title CVE number Publicly disclosed Exploited
Internet Explorer Information Disclosure Vulnerability CVE-2016-3298 No Yes
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