==================================================================== CERT-Renater Note d'Information No. 2016/VULN194 _____________________________________________________________________ DATE : 11/05/2016 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Windows version Vista, 7, 8.1, RT 8.1, 10, Server 2008, Server 2012 running Microsoft Graphics Component. ====================================================================== KB3156754 https://technet.microsoft.com/en-us/library/security/MS16-055 ____________________________________________________________________ MS16-055: Critical - Security Update for Microsoft Graphics Component (3156754) Document Metadata Bulletin Number: MS16-055 Bulletin Title: Security Update for Microsoft Graphics Component Severity: Critical KB Article: 3156754 Version: 1.0 Published Date: May 10, 2016 Executive Summary This security update resolves vulnerabilities in Microsoft Windows. The most severe of the vulnerabilities could allow remote code execution if a user opens a specially crafted document or visits a specially crafted website. 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. This security update is rated Critical for all supported releases of Microsoft Windows. Affected Software Windows Vista Windows Vista x64 Edition Service Pack 2 Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 for Itanium-based Systems Service Pack 2 Windows 7 for 32-bit Systems Service Pack 1 Windows 7 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for x64-based Systems Service Pack 1 Windows Server 2008 R2 for Itanium-based Systems Service Pack 1 Windows 8.1 for 32-bit Systems Windows 8.1 for x64-based Systems Windows Server 2012 Windows Server 2012 R2 Windows RT 8.1 Windows 10 for 32-bit Systems Windows 10 for x64-based Systems Windows Server 2012 Vulnerability Information Multiple Windows Graphics Component Information Disclosure Vulnerabilities Information disclosure vulnerabilities exist when the Windows GDI component improperly discloses the contents of its memory. An attacker who successfully exploited the vulnerabilities could obtain information to further compromise the user's system. There are multiple ways an attacker could exploit the vulnerabilities, such as by convincing a user to open a specially crafted document, or by convincing a user to visit an untrusted webpage. The update addresses the vulnerabilities by correcting how the Windows GDI component 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 Windows Graphics Component Information Disclosure Vulnerability CVE-2016-0168 No No Windows Graphics Component Information Disclosure Vulnerability CVE-2016-0169 No No Windows Graphics Component RCE Vulnerability - CVE-2016-0170 A remote code execution vulnerability exists when the Windows GDI component fails to properly handle objects in memory. An attacker who successfully exploited the 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 the vulnerability: In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability and then convince a user to view the website. An attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically by getting them to click a link in an email or Instant Messenger message that takes users 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. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in the 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 Windows Graphics Component RCE Vulnerability CVE-2016-0170 No No Direct3D Use After Free Vulnerability - CVE-2016-0184 A remote code execution vulnerability exists when the Windows GDI component fails to properly handle objects in memory. An attacker who successfully exploited the 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 the vulnerability: In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability and then convince a user to view the website. An attacker would have no way to force users to view the attacker-controlled content. Instead, an attacker would have to convince users to take action, typically by getting them to click a link in an email or Instant Messenger message that takes users 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. The security update addresses the vulnerability by correcting how the Windows GDI component handles objects in the 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 Direct3D Use After Free Vulnerability CVE-2016-0184 No Yes ========================================================== Serveur de référence du CERT-Renater https://services.renater.fr/ssi/ ========================================================== + CERT-RENATER | tel : 01-53-94-20-44 + + 23 - 25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email: cert@support.renater.fr + ==========================================================