==================================================================== CERT-Renater Note d'Information No. 2016/VULN008 _____________________________________________________________________ DATE : 13/01/2016 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Windows version 10 running Microsoft Edge. ====================================================================== KB3124904 https://technet.microsoft.com/en-us/library/security/MS16-002 _____________________________________________________________________ MS16-002 Cumulative Security Update for Microsoft Edge (3124904) Document Metadata Bulletin Number: MS16-002 Bulletin Title: Cumulative Security Update for Microsoft Edge Severity: Critical KB Article: 3124904 Version: 1.0 Published Date: January 12, 2016 Executive Summary This security update resolves vulnerabilities in Microsoft Edge. The vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Microsoft Edge. An attacker who successfully exploited the vulnerabilities could gain the same user rights as 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 Mirosoft Edge Windows 10 for 32-bit Systems [1] Windows 10 for x64-based Systems [1] Windows 10 Version 1511 for 32-bit Systems [1] [2] Windows 10 Version 1511 for x64-based Systems [1] [2] [1] Windows 10 updates are cumulative. In addition to containing non-security updates, they also contain all of the security fixes for all of the Windows 10-affected vulnerabilities shipping with the monthly security release. The updates are available via the Microsoft Update Catalog. [2] Although Windows 10 Version 1511 is not affected by the vulnerability described in this bulletin, update 3124263 includes defense-in-depth updates to help improve security-related features for Microsoft Edge. Customers running Windows 10 Version 1511 should install the update for these defense-in-depth updates. Vulnerability Information Microsoft Edge Memory Corruption Vulnerability CVE-2016-0003 A remote code execution vulnerability exists when Microsoft Edge improperly accesses objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge, and then convince a user to view the website. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements by adding specially crafted content that could exploit the vulnerability. In all cases, however, 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 way of enticement in an email or Instant Messenger message, or by getting them to open an attachment sent through email. 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 who successfully exploited the vulnerability 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. The update addresses the vulnerability by modifying how Microsoft Edge handles 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 Microsoft Edge Memory Corruption Vulnerability CVE-2016-0003 No No Microsoft Edge Memory Corruption Vulnerability CVE-2016-0024 A remote code execution vulnerability exists in the way that the Chakra JavaScript engine renders when handling objects in memory in Microsoft Edge. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Microsoft Edge and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the Edge rendering engine. The attacker could also take advantage of compromised websites, and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability. 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 who successfully exploited the vulnerability 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. The update addresses the vulnerability by modifying how the Chakra JavaScript scripting engine handles 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 Microsoft Edge Memory Corruption Vulnerability CVE-2016-0024 No No ========================================================== 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 + ==========================================================