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15 March 2017

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             AUSCERT External Security Bulletin Redistribution

       MS17-015 - Important: Security Update for Microsoft Exchange
                             Server (4013242)
                               15 March 2017


        AusCERT Security Bulletin Summary

Product:           Microsoft Exchange Server
Publisher:         Microsoft
Operating System:  Windows Server 2008 R2
                   Windows Server 2012
                   Windows Server 2012 R2
                   Windows Server 2016
Impact/Access:     Increased Privileges -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2017-0110  

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Microsoft Security Bulletin MS17-015: Security Update for Microsoft Exchange 
Server (4013242)

Bulletin Number: MS17-015

Bulletin Title:  Security Update for Microsoft Exchange Server

Severity:        Important

KB Article:      4013242

Version:         1.0

Published Date:  14/03/2017

Executive Summary

This security update resolves a vulnerability in Microsoft Exchange Outlook 
Web Access (OWA).

The vulnerability could allow remote code execution in Exchange Server if an 
attacker sends an email with a specially crafted attachment to a vulnerable 
Exchange server.

This security update is rated Important for all supported editions of 
Microsoft Exchange Server 2013 and Microsoft Exchange Server 2016. For more 
information, see the Affected Software and Vulnerability Severity Ratings 

The security update addresses the vulnerability by correcting how Microsoft 
Exchange validates web requests.

For more information about the vulnerability, see the Vulnerability 
Information section.

For more information about this update, see Microsoft Knowledge Base Article 

Affected Software

Executive Summary

Microsoft Exchange Server 2013

Microsoft Exchange Server 2016

Vulnerability Information

Microsoft Exchange Elevation of Privilege Vulnerability CVE-2017-0110

An elevation of privilege vulnerability exists in the way that Microsoft 
Exchange Outlook Web Access (OWA) fails to properly handle web requests.To 
exploit the vulnerability, an attacker who successfully exploited this 
vulnerability could, perform script/content injection attacks, and attempt to
trick the user into disclosing sensitive information.

An attacker could exploit the vulnerability by sending a specially crafted 
email, containing a malicious link, to a user. Alternatively, an attacker 
could use a chat client to social engineer a user into clicking on the 
malicious link.

The security update addresses the vulnerability by correcting how Microsoft 
Exchange validates web requests.

NOTE: For this vulnerability to be exploited, a user must click on a 
maliciously crafted link from an attacker.

Mitigating Factors

Microsoft has not identified any mitigating factors for this vulnerability.


Microsoft has not identified any workarounds for this vulnerability.

Security Update Deployment

For Security Update Deployment information, see the Microsoft Knowledge Base 
article referenced here in the Executive Summary.


Microsoft recognizes the efforts of those in the security community who help 
us protect customers through coordinated vulnerability disclosure. See 
Acknowledgments for more information.


The information provided in the Microsoft Knowledge Base is provided "as is" 
without warranty of any kind. Microsoft disclaims all warranties, either 
express or implied, including the warranties of merchantability and fitness 
for a particular purpose. In no event shall Microsoft Corporation or its 
suppliers be liable for any damages whatsoever including direct, indirect, 
incidental, consequential, loss of business profits or special damages, even 
if Microsoft Corporation or its suppliers have been advised of the possibility
of such damages. Some states do not allow the exclusion or limitation of 
liability for consequential or incidental damages so the foregoing limitation
may not apply

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