Threat Level: green Handler on Duty: Daniel Wesemann

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Targeted zero day attack being used against Internet Explorer 6, 7, and 8

Published: 2012-12-30
Last Updated: 2013-01-01 01:04:47 UTC
by Chris Mohan (Version: 3)
1 comment(s)

Microsoft have published a security advisory for a zero day attack being used against a "targeted audience" using Internet Explorer 6, 7, and 8. This atypically means corporate or business users still locked in to using these older browsers.

Update:
 
There is now a Metasploit module (ie_cdwnbindinfo_uaf)that emulates this attack, meaning this will move in to mainstream exploitation rapidly, thus mitigation steps should be taken so soon as possible.
 
Home users running XP should be looking to use another browser as their primary method of browsing the web, and corporate security staff should review Microsoft’s recommendations to build a layered defence to protect staff.
 
Microsoft’s information on the vulnerability:
 
Update 2:
 
Microsoft have release a workaround option for some scenarios.
Updated Microsoft advisory 2794220:
http://technet.microsoft.com/en-us/security/advisory/2794220
 
Microsoft FixIt workaround:
http://support.microsoft.com/kb/2794220
 
 
Background information:
 
General information and basic mitigation steps at:
http://blogs.technet.com/b/msrc/archive/2012/12/29/microsoft-releases-security-advisory-2794220.aspx
 
Useful technical information at:
http://blogs.technet.com/b/srd/archive/2012/12/29/new-vulnerability-affecting-internet-explorer-8-users.aspx
 
Here is some basic analysis from FireEye on the Council on Foreign Relations website that was compromised  and hosting malicious content: 
http://blog.fireeye.com/research/2012/12/council-foreign-relations-water-hole-attack-details.html
 
Thank you to Toby and another Reader for writing in with this.
 
Chris Mohan --- Internet Storm Center Handler on Duty

 

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