Microsoft has announced that there is a new unpatched security vulnerability that affects multiple versions of Internet Explorer (version 6 to 11). Microsoft issued the security advisory 2963983 on April 26th. The flaw is know as CVE-2014-1776.
The flaw would allow remote code execution for anyone using Internet Explorer 6, 7, 8, 9, 10 and 11.
“The vulnerability is a remote code execution vulnerability. The vulnerability exists in the way that Internet Explorer accesses an object in memory that has been deleted or has not been properly allocated. The vulnerability may corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user within Internet Explorer. An attacker could host a specially crafted website that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the website.”
Microsoft at this time has a few different work around to mitigate this exploit until Microsoft in conjunction with FireEye. The first option that Microsoft lists is to deploy the Enhanced Mitigation Experience Toolkit 4.1. “The Enhanced Mitigation Experience Toolkit (EMET) helps mitigate the exploitation of this vulnerability by adding additional protection layers that make the vulnerability harder to exploit. EMET 4.1 is officially supported by Microsoft.” This is an optional software install, so there is a chance most people will not currently have this installed on their system.
FireEye also recommends going a step further and disabling the Adobe Flash plug-in for IE, as the exploit will not work without it. This may not be a viable option for everyone, however it you do not absolutely need to view flash videos within IE you should implement this as well until the patch is made available from Microsoft.
Follow up information will be added to this post in the near future when the patch is made available, as well as any future updates.