Microsoft Security Bulletin MS14-080 - Critical

• 10/11/2017
• 20 minutes to read
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Cumulative Security Update for Internet Explorer (3008923)

Published: December 9, 2014 | Updated: April 14, 2015

Version: 3.0

Executive Summary

This security update resolves fourteen privately reported vulnerabilities in Internet Explorer. The most severe of these vulnerabilities could allow remote code execution if a user views a specially crafted webpage using Internet Explorer. An attacker who successfully exploited these 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.

This security update is rated Critical for Internet Explorer 6 (IE 6), Internet Explorer 7 (IE 7), Internet Explorer 8 (IE 8), Internet Explorer 9 (IE 9), Internet Explorer 10 (IE 10), and Internet Explorer 11 (IE 11) on affected Windows clients, and Moderate for Internet Explorer 6 (IE 6), Internet Explorer 7 (IE 7), Internet Explorer 8 (IE 8), Internet Explorer 9 (IE 9), Internet Explorer 10 (IE 10), and Internet Explorer 11 (IE 11) on affected Windows servers. For more information, see the Affected Software section.

The security update addresses the vulnerabilities by modifying the way that Internet Explorer handles objects in memory, by preventing the XSS filter in Internet Explorer from incorrectly disabling HTML attributes, by helping to ensure that affected versions of Internet Explorer properly implement the ASLR security feature, and by modifying how the VBScript scripting engine handles objects in memory. For more information about the vulnerabilities, see the Vulnerability Information section.

For more information about this update, see Microsoft Knowledge Base Article 3008923.

Affected Software

The following software versions or editions are affected. Versions or editions that are not listed are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, see Microsoft Support Lifecycle.

Affected Software 

^[2]This update is available via Windows Update.

Note For systems running Internet Explorer 9 or later, CVE-2014-6363 is addressed by this update (3008923). For all other affected versions of Internet Explorer, CVE-2014-6363 is addressed by the update described in MS14-084. For more information, see the Update FAQ.

Note Windows Technical Preview and Windows Server Technical Preview are affected. Customers running these operating systems are encouraged to apply the update, which is available via Windows Update. 

Update FAQ

For addressing CVE-2014-6363, what update applies to my system?
CVE-2014-6363 is a vulnerability in the VBScript scripting engine. Although the attack vector is through Internet Explorer, this vulnerability is addressed by this update (3008923) only for systems running Internet Explorer 9, Internet Explorer 10, and Internet Explorer 11. For Internet Explorer 8 and earlier and for systems without Internet Explorer installed, this vulnerability is addressed by the update described in MS14-084.

The update that addresses CVE-2014-6363 depends on the version of the VBScript scripting engine that is installed on your system. Consult the following table for update information.

Severity Ratings and Vulnerability Identifiers

The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the December bulletin summary.

In the following table Where specified, Critical, Important, and Moderate values indicate severity ratings. For more information, see Security Bulletin Severity Rating System. Where specified, the abbreviations as shown in the following key indicate maximum impact: