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Internet Explorer 0day: CVE-2014-1776

Posted April 29, 2014    BeyondTrust Research Team

Over the weekend, on April 26, Microsoft released an advisory about an Internet Explorer use-after-free zeroday vulnerability, CVE-2014-1776, that is being exploited in the wild. The vulnerability lies within MSHTML.dll, and affects Internet Explorer 6 through 11. According to FireEye, attacks have been spotted in the wild targeting Internet Explorer 9 through 11. The observed attacks rely on an exploit for Adobe Flash, which targets a now patched vulnerability, CVE-2014-0515. Exploiting the Flash vulnerability allowed attackers to bypass ASLR and DEP (security protection mechanisms).

Microsoft has released an out-of-band patch to address this vulnerability, MS14-021. Install this patch as soon as possible to address this vulnerability.

To mitigate this vulnerability, users are encouraged to apply the following workarounds until the patch can be applied.

• Configure EMET 4.1 or 5.0 to protect Internet Explorer. This was observed to mitigate exploitation of this vulnerability.
• Use Enhanced Protected Mode in IE (available in 10 and higher).
• Upgrade the Flash browser plugin to 13.0.0.206 for Windows/Mac and 11.2.202.356 for Linux.
• If you are unable to upgrade Flash, then disable the Flash browser plugin.

Retina has audits available to detect vulnerable Internet Explorer and Flash player installations:
• 33939 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE6 XP32
• 33940 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE6 XP64/2K3/2K364
• 33941 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE6 XP64/2K364 x64
• 33942 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE7
• 33943 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE7 x64
• 33944 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE8 XP/2003
• 33945 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE8 XP/2003 x64
• 33946 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE8
• 33947 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE8 x64
• 33948 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE9
• 33949 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE9 x64
• 33950 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE10
• 33951 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE10 x64
• 33952 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE11
• 33953 – Microsoft Internet Explorer Use-After-Free (KB2965111) – IE11 x64

• 33877 – Adobe APSB14-13: Flash Player – IE for Windows XP/2003/Vista/2008/7
• 33878 – Adobe APSB14-13: Flash Player – IE for Windows 8/2012/8.1/2012 R2
• 33879 – Adobe APSB14-13: Flash Player – Other Browsers for Windows
• 33880 – Adobe APSB14-13: Flash Player – Linux
• 33881 – Adobe APSB14-13: Flash Player – Mac OS X

Revisions
2014-04-29: Original Post
2014-05-01: Added Notice of Out-Of-Band Patch Release, MS14-021
2014-05-01: Removed Zero-Day audit 33867.
2014-05-01: Added KB2965111 audits.

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Leave a Reply

One Response to “Internet Explorer 0day: CVE-2014-1776”

  1. Luis

    does retina protection agent protects windows xp stations against this problem?

    May 01, 2014 10:42:08, Reply

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