13 January 2016
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2016.0073 MS16-001 Cumulative Security Update for Internet Explorer 13 January 2016 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Internet Explorer Publisher: Microsoft Operating System: Windows Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Increased Privileges -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2016-0005 CVE-2016-0002 Original Bulletin: https://technet.microsoft.com/en-us/library/security/MS16-001 - --------------------------BEGIN INCLUDED TEXT-------------------- MS16-001 Cumulative Security Update for Internet Explorer (3124903) Document Metadata Bulletin Number: MS16-001 Bulletin Title: Cumulative Security Update for Internet Explorer Severity: Critical KB Article: 3124903 Version: 1.0 Published Date: January 12, 2016 Executive Summary This security update resolves vulnerabilities in Internet Explorer. The more severe of the vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited this 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 this 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. Affected Software Internet Explorer 7 Internet Explorer 8 Internet Explorer 9 Internet Explorer 10 Internet Explorer 11 Vulnerability Information Scripting Engine Memory Corruption Vulnerability CVE-2016-0002 A remote code execution vulnerability exists in the way that the VBScript engine renders when handling objects in memory in Internet Explorer. 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 Internet Explorer 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 IE 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 VBScript 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 Scripting Engine Memory Corruption Vulnerability CVE-2016-0002 No No Internet Explorer Elevation of Privilege Vulnerability CVE-2016-0005 An elevation of privilege vulnerability exists when Internet Explorer does not properly enforce cross-domain policies, which could allow an attacker to access information from one domain and inject it into another domain. The update addresses the vulnerability by helping to ensure that cross-domain policies are properly enforced in Internet Explorer. In a web-based attack scenario, an attacker could host a website that is used to attempt to exploit the vulnerability. In addition, compromised websites and websites that accept or host user-provided content could contain 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. For example, an attacker could trick users into clicking a link that takes them to the attacker's site. An attacker who successfully exploited this vulnerability could elevate privileges in affected versions of Internet Explorer. The vulnerability by itself does not allow arbitrary code to be run. However, the vulnerability could be used in conjunction with another vulnerability (for example, a remote code execution vulnerability) that could take advantage of the elevated privileges when running arbitrary code. For example, an attacker could exploit another vulnerability to run arbitrary code through Internet Explorer, but due to the context in which processes are launched by Internet Explorer, the code might be restricted to run at a low integrity level (very limited permissions). However, an attacker could, in turn, exploit this vulnerability to cause the arbitrary code to run at a medium integrity level (permissions of the current user). The following table contains links to the standard entry for each vulnerability in the Common Vulnerabilities and Exposures list: 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 Internet Explorer Elevation of Privilege Vulnerability CVE-2016-0005 Yes 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 email@example.com 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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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBVpV3R36ZAP0PgtI9AQKiYw//cRkvclXeVSXPMvEmDKkGemGRSNGfUr6N Rei8U7++C4DcaNdWQ/ulm2zlHEeLzQHVM9oXSjVFIVcxT/89zjCrjfpyMYOdUEB1 vDCKh+L5NYAfIbF06mVYIfgKUxym3rUHaGfbLW9mcqqBM1C6E1/z39Cn3AoqL9Lt eyAVFNN14u2vGO4fYt8ofLBkQAUQgLib6Wd/lxA6qE3gKNyaIENF1jQ1cxc/t1s6 OI9PQy4PPRX2wplIuFrigtKcZhDpVb2Nphfcm7+mt67xjy6uD8BuNnmI3G0imuw2 iryXBZeKbs5d1GupxrkEuAeZVm2dQHudtZxQY3mswLq3uPz3utngPzDSYHVmkaHX MO7ugVOUpDbOAoI6ow7S+ugXqYobLcyKaxv0UW6+h448VxR6HcrjgmqDN45314Ze GVomNjUCUMUVrS3jy5jyYIk+70a4UnUOVbaYg60pAiBbw6191TcPiHQGs4YWfWCh AxAYoDWxCbSN4Q52lapJUCFwTJNGZUdZn/uxkeIYgdeAkGpGbvl+/2FcoVpB/cNU ywxYzNR71hWvY8jS1EnpS2MHrI45T0ZEbAtH8sV0D/3EQeE3APx8+unpSUdFYZFl UD1Y/xAA7zf7cAGs3mNZmYE0eJeIxB0sHhz23S3t1eEKWAPnsKWAhLMgQkIll1r/ 2H52CFEYfyw= =HKF2 -----END PGP SIGNATURE-----