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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.1133 This security update resolves vulnerabilities in Microsoft Office. 11 May 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Office Publisher: Microsoft Operating System: Windows OS X Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2016-0198 CVE-2016-0183 CVE-2016-0140 CVE-2016-0126 Original Bulletin: https://technet.microsoft.com/en-us/library/security/MS16-054 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS16-054: Security Update for Microsoft Office (3155544) Document Metadata Bulletin Number: MS16-054 Bulletin Title: Security Update for Microsoft Office Severity: Critical KB Article: 3155544 Version: 1.0 Published Date: May 10, 2016 Executive Summary This security update resolves vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a user opens a specially crafted Microsoft Office file. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. Customers whose accounts are configured to have fewer user rights on the system could be less impacted than those who operate with administrative user rights. Affected Software Microsoft Office 2007 Service Pack 3 Microsoft Office 2010 Service Pack 2 Microsoft Office 2013 Service Pack 2 Microsoft Word 2013 RT Service Pack 1 Microsoft Office 2016 Microsoft Word 2016 Microsoft Word 2016 for Mac Microsoft Office Compatibility Pack Service Pack 3 Microsoft Office Word Viewer Vulnerability Information Multiple Microsoft Office Memory Corruption Vulnerabilities Multiple remote code execution vulnerabilities exist in Microsoft Office software when the Office software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerabilities could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Exploitation of the vulnerabilities requires that a user open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario an attacker could exploit the vulnerabilities by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerabilities. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince them to open the specially crafted file. The security update addresses the vulnerabilities by correcting how Office handles objects in memory. The following tables contain links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list: Vulnerability title CVE number Publicly disclosed Exploited Microsoft Office Memory Corruption Vulnerability CVE-2016-0126 No No Microsoft Office Memory Corruption Vulnerability CVE-2016-0140 No No Microsoft Office Memory Corruption Vulnerability CVE-2016-0198 No No Microsoft Office Graphics RCE Vulnerability - CVE-2016-0183 A remote code execution vulnerability exists when the Windows font library improperly handles specially crafted embedded fonts. An attacker who successfully exploited this vulnerability could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. There are multiple ways an attacker could exploit this vulnerability. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit this vulnerability, and then convince a user to view the website. An attacker would have no way to force a user to view the attacker-controlled content. Instead, an attacker would have to convince a user to take action, typically by getting the user to click a link in an email message or in an Instant Messenger message that takes the user to the attacker's website, or by opening an attachment sent through email. In a file sharing attack scenario, an attacker could provide a specially crafted document file that is designed to exploit the vulnerability, and then convince a user to open the document file. Note that where the severity is indicated as Critical in the Affected Software and Vulnerability Severity Ratings table, the Preview Pane is an attack vector for CVE-2016-0183. The security update addresses the vulnerability by correcting how the Windows font library handles embedded fonts. The following tables contain links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list: Vulnerability title CVE number Publicly disclosed Exploited Microsoft Office Graphics RCE Vulnerability CVE-2016-0183 No No - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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