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AUSCERT External Security Bulletin Redistribution
Microsoft Security Bulletin MS16-115: Security Update for
Microsoft Windows PDF Library (3188733)
14 September 2016
AusCERT Security Bulletin Summary
Product: Microsoft Windows
Operating System: Windows
Impact/Access: Access Confidential Data -- Remote with User Interaction
CVE Names: CVE-2016-3374 CVE-2016-3370
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Microsoft Security Bulletin MS16-115: Security Update for Microsoft Windows
PDF Library (3188733)
This security update resolves vulnerabilities in Microsoft Windows. The
vulnerabilities could allow information disclosure if a user views specially
crafted PDF content online or opens a specially crafted PDF document.
This security update is rated Important for all supported editions of Windows
8.1, Windows Server 2012, Windows RT 8.1, Windows Server 2012 R2, and Windows
Windows Server 2012
Windows Server 2012 R2
Windows RT 8.1
Multiple PDF Library Information Disclosure Vulnerabilities
Multiple information disclosure vulnerabilities exist in the way that the
Windows PDF Library handles objects in memory. An attacker who successfully
exploited the vulnerabilities could obtain information to further compromise a
In a web-based attack scenario, an attacker could host a website that is used
to attempt to exploit the vulnerabilities. Additionally, compromised websites
and websites that accept or host user-provided content could contain specially
crafted content that could be used to exploit the vulnerabilities. However, in
all cases an attacker would have no way to force users to view
attacker-controlled content. Instead, an attacker would have to convince users
to take action. For example, an attacker could trick users into clicking a
link that takes them to the attacker's site.
The update addresses the vulnerabilities by correcting how certain functions
handle 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
PDF Library Information Disclosure Vulnerability CVE-2016-3370 No No
PDF Library Information Disclosure Vulnerability CVE-2016-3374 No No
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