Microsoft APP-V ASLR Bypass – CVE-2016-0137
An information disclosure vulnerability exists in the way that the Click-to-Run (C2R) components handle objects in memory, which could lead to an Address Space Layout Randomization (ASLR) bypass.
An attacker who successfully exploited the information disclosure vulnerability could use the obtained information to bypass the ASLR security mechanism in Windows, which helps protect users from a broad class of vulnerabilities.

The ASLR bypass by itself does not allow arbitrary code execution; however, an attacker could use the ASLR bypass in conjunction with another vulnerability, such as a remote code execution vulnerability, that could leverage the ASLR bypass to run arbitrary code.
To exploit the ASLR bypass, an attacker would have to log on to an affected system and run a specially crafted application. Workstations are primarily vulnerable to the potential ASLR bypass.
The security update addresses the ASLR bypass by correcting how C2R components handle memory addresses.
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 APP-V ASLR Bypass

CVE-2016-0137

No

No

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

Workarounds
Microsoft has not identified any workarounds for this bypass condition.

Microsoft Information Disclosure Vulnerability – CVE-2016-0141
An information disclosure vulnerability exists when Visual Basic macros in Office improperly exports a user’s private key from the certificate store while saving a document.

An attacker who successfully exploited the vulnerability could potentially gain access to the user’s private key.
The attacker would have to use another vulnerability, or employ a social engineering technique, to obtain the saved document from the user.
The security update addresses the vulnerability by correcting how Microsoft Office saves 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 Information Disclosure Vulnerability

CVE-2016-0141

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 Microsoft Office Memory Corruption Vulnerabilities
Multiple remote code execution vulnerabilities exist in Microsoft Office software when the Office software fails to properly handle objects in memory.

An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user.
If the current user is logged on with administrative user rights, an attacker could take control of the affected system.

An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
Exploitation of the vulnerabilities requires that a user open a specially crafted file with an affected version of Microsoft Office software.
In an email attack scenario an attacker could exploit the vulnerabilities by sending the specially crafted file to the user and convincing the user to open the file.
In a web-based attack scenario an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerabilities.

An attacker would have no way to force users to visit the website.
Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince them to open the specially crafted file.
Note that where the severity is indicated as Critical in the Affected Software and Vulnerability Severity Ratings table, the Preview Pane is an attack vector for CVE-2016-3357.
The security update addresses the vulnerabilities by correcting how Microsoft Office 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 Office Memory Corruption Vulnerability

CVE-2016-3357

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3358

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3359

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3360

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3361

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3362

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3363

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3364

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3365

No

No

Microsoft Office Memory Corruption Vulnerability

CVE-2016-3381

No

No

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

Workarounds
Microsoft has not identified any workarounds for these vulnerabilities.

Microsoft Office Spoofing Vulnerability – CVE-2016-3366
A spoofing vulnerability exists when Microsoft Outlook does not strictly adhere to RFC2046, and improperly identifies the end of a MIME attachment.

An improper MIME attachment ending may cause antivirus or antispam scanning to not work as intended.
To exploit the vulnerability, an attacker could send a specially crafted email attachment to a user in an attempt to launch a social engineering attack, such as phishing.
The security update addresses the vulnerability by correcting how Outlook determines the end of MIME messages.
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 Office Spoofing Vulnerability

CVE-2016-3366

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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