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AUSCERT External Security Bulletin Redistribution
ESB-2017.0660
MS17-009 - Critical: Security Update for Microsoft Windows
PDF Library (4010319)
15 March 2017
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AusCERT Security Bulletin Summary
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Product: Microsoft Windows PDF Library
Publisher: Microsoft
Operating System: Windows 8.1
Windows Server 2012
Windows Server 2012 R2
Windows RT 8.1
Windows 10
Windows Server 2016
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-0023
Original Bulletin:
https://technet.microsoft.com/en-us/library/security/MS17-009
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Microsoft Security Bulletin MS17-009: Security Update for Microsoft Windows
PDF Library (4010319)
Bulletin Number: MS17-009
Bulletin Title: Security Update for Microsoft Windows PDF Library
Severity: Critical
KB Article: 4010319
Version: 1.0
Published Date: 14/03/17
Executive Summary
This security update resolves a vulnerability in Microsoft Windows. The
vulnerability could allow remote code execution if a user views specially
crafted PDF content online or opens a specially crafted PDF document.
This security update is rated Critical for all supported editions of Windows
8.1, Windows Server 2012, Windows RT 8.1, Windows Server 2012 R2, Windows 10,
and Windows Server 2016. For more information, see the Affected Software and
Vulnerability Severity Ratings section.
The security update addresses the vulnerablity by correcting how affected
systems handle objects in memory. For more information about the
vulnerability, see the Vulnerability Information section.
For more information about this update, see Microsoft Knowledge Base Article
4010319.
Affected Software
Windows 8.1
Windows Server 2012
Windows Server 2012 R2
Windows RT 8.1
Windows 10
Windows Server 2016
Note Please see the Security Update Guide for a new approach to consuming the
security update information. You can customize your views and create affected
software spreadsheets, as well as download data via a restful API. For more
information, please see the Security Updates Guide FAQ. As a reminder, the
Security Updates Guide will be replacing security bulletins. Please see our
blog post, Furthering our commitment to security updates, for more details.
Update FAQ
The PDF Library vulnerability discussed in this bulletin is also discussed in
the Microsoft Edge bulletin being released in March. To be protected from the
vulnerability, do I need to install multiple updates for my particular system
and Microsoft Edge configuration?
No. Customers running Windows 10 systems only need to install the one
cumulative update for their system to be protected from CVE-2017-0023. The PDF
library vulnerability also appears in the Microsoft Edge bulletin (MS17-007)
because on Windows 10 systems the security fix for this vulnerability resides
in the Microsoft Edge component that is shipping in the cumulative update.
Vulnerability Information
Microsoft PDF Memory Corruption Vulnerability CVE 2017-0023
A remote code execution vulnerability exists when Microsoft Windows PDF
Library improperly handles objects in memory. The vulnerability could corrupt
memory in a way that enables an attacker to execute arbitrary code in the
context of the current user. An attacker who successfully exploited the
vulnerability 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.
To exploit the vulnerability on Windows 10 systems with Microsoft Edge set as
the default browser, an attacker could host a specially crafted website that
contains malicious PDF content and then convince users 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 PDF content to such sites. Only Windows 10 systems with
Microsoft Edge set as the default browser can be compromised simply by viewing
a website. The browsers for all other affected operating systems do not
automatically render PDF content, so an attacker would have no way to force
users to view attacker-controlled content. Instead, an attacker would have to
convince users to open a specially crafted PDF document, typically by way of
an enticement in an email or instant message or by way of an email attachment.
The update addresses the vulnerability by modifying how affected systems
handle objects in memory.
Mitigating Factors
Microsoft has not identified any mitigating factors for this vulnerability.
Workarounds
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.
Acknowledgments
Microsoft recognizes the efforts of those in the security community who help
us protect customers through coordinated vulnerability disclosure. See
Acknowledgments for more information.
Disclaimer
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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