<p>An elevation of privilege vulnerability exists when Microsoft SharePoint Server and Skype for Business Server improperly handle OAuth token validation. An attacker who successfully exploited the vulnerability could bypass authentication and achieve improper access.</p> <p>To exploit this vulnerability, an attacker would need to modify the token.</p> <p>The update addresses the vulnerability by modifying how Microsoft SharePoint Server and Skype for Business Server validate tokens.</p>

An information disclosure vulnerability exists in Lync 2013, aka 'Lync 2013 Information Disclosure Vulnerability'.

GDI+ in Microsoft Windows Vista SP2 and Server 2008 SP2; Office 2003 SP3, 2007 SP3, and 2010 SP1 and SP2; Office Compatibility Pack SP3; and Lync 2010, 2010 Attendee, 2013, and Basic 2013 allows remote attackers to execute arbitrary code via a crafted TIFF image, as demonstrated by an image in a Word document, and exploited in the wild in October and November 2013.

Microsoft .NET Framework 3.0 SP2, 3.5, 3.5.1, 4, and 4.5; Silverlight 5 before 5.1.20513.0; win32k.sys in the kernel-mode drivers, and GDI+, DirectWrite, and Journal, in Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows Server 2012, and Windows RT; GDI+ in Office 2003 SP3, 2007 SP3, and 2010 SP1; GDI+ in Visual Studio .NET 2003 SP1; and GDI+ in Lync 2010, 2010 Attendee, 2013, and Basic 2013 allow remote attackers to execute arbitrary code via a crafted TrueType Font (TTF) file, aka "TrueType Font Parsing Vulnerability."