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

Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.

Workarounds
Microsoft has not identified any workarounds for this vulnerability.

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

Mitigating Factors
Microsoft has not identified any mitigating factors for these vulnerabilities.

Workarounds
Microsoft has not identified any workarounds for these vulnerabilities.

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

Mitigating Factors
Microsoft has not identified any mitigating factors for these vulnerabilities.

Workarounds
Microsoft has not identified any workarounds for these vulnerabilities.

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

Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.

Workarounds
Microsoft has not identified any workarounds for this vulnerability.

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