Microsoft Exchange Information Disclosure Vulnerability – CVE-2016-0138
An information disclosure vulnerability exists in the way that Microsoft Exchange Server parses email messages.

The vulnerability could allow an attacker to discover confidential user information that is contained in Microsoft Outlook applications.
To exploit the vulnerability, an attacker could use “send as” rights to send a specially crafted message to a user.
The security update addresses the vulnerabilities by correcting how Microsoft Exchange parses certain unstructured file formats.
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 Exchange Information Disclosure Vulnerability

CVE-2016-0138

No

No

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

Workarounds
Microsoft has not identified any workarounds for this vulnerability.

Microsoft Exchange Open Redirect Vulnerability – CVE-2016-3378
An open redirect vulnerability exists in Microsoft Exchange that could lead to Spoofing.

To exploit the vulnerability, an attacker could send a link that has a specially crafted URL, and convince the user to click the link. When an authenticated Exchange user clicks the link, the authenticated user’s browser session could be redirected to a malicious site that is designed to impersonate a legitimate website.

By doing so, the attacker could trick the user and potentially acquire sensitive information, such as the user’s credentials.
The update addresses the vulnerability by correcting how Exchange handles open redirect requests.
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 Exchange Open Redirect Vulnerability

CVE-2016-3378

No

No

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

Workarounds
Microsoft has not identified any workarounds for this vulnerability.

Microsoft Exchange Elevation of Privilege Vulnerability – CVE-2016-3379
An elevation of privilege vulnerability exists in the way that Microsoft Outlook handles meeting invitation requests.

To exploit the vulnerability, an attacker could send a specially crafted Outlook meeting invitation request with malicious cross-site scripting (XSS) capability to a user.
The update addresses the vulnerability by correcting how Outlook handles meeting invitation requests.
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 Exchange Elevation of Privilege Vulnerability

CVE-2016-3379

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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