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Land of the Rising IE 0day

Posted September 17, 2013    BeyondTrust Research Team

A new Internet Explorer zeroday has surfaced that affects every supported version of Internet Explorer. It has been observed in the wild in targeted attacks in Japan. Current attacks are focusing on exploiting Internet Explorer 8 and 9 on Windows XP and 7 machines.

This is a use-after-free vulnerability in mshtml.dll, which is a DLL used by Windows to present HTML content to the user. The current exploitation vector relies on an extremely common Microsoft Office DLL, hxds.dll, which was compiled without address space layout randomization (ASLR) support. Attackers use DLLs like this to be able to more easily exploit a system, allowing them to execute arbitrary code at will.

To help mitigate this vulnerability, Microsoft has released a Fix it, which can be found here. Additionally, EMET 4.0 can be used to mitigate this vulnerability, as well as others.

Because the Fix it has been released, as well as a detailed blog post by Microsoft discussing the vulnerability, attackers will be able to deduce where the vulnerability lies, which greatly increases the likelihood of seeing this vulnerability exploited in areas outside of Japan. We expect to see this vulnerability incorporated into exploit frameworks in the near future.

The exploitation of this vulnerability is mitigated by built-in memory protections utilized by PowerBroker Endpoint Protection Platform, and is detected by Retina in the following audits:
30541 – Microsoft Internet Explorer MSHTML NULL_IMPORT_DESCRIPTOR (Zero-Day)
30542 – Microsoft Internet Explorer MSHTML NULL_IMPORT_DESCRIPTOR (Zero-Day) – x64

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Additional articles

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PowerBroker for Mac: A Least-Privileged Apple a Day…

Posted July 27, 2015    Jason Silva

BeyondTrust PowerBroker for Mac reduces the risk of privilege misuse by enabling standard users on Mac OS X to perform administrative tasks successfully without entering elevated credentials.

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PrivilegedAccountManagement

On Demand Webinar – Now is the time for Privileged Account Management

Posted July 24, 2015    BeyondTrust Software

In this webinar, SANS Instructor and Founder of Voodoo Security, Dave Shackleford, will revisit several hacking and breach scenarios that involved privileged accounts, and use these as examples while discussing tools and tactics to get this problem under control once and for all.

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Privileged Account Management: The Time is Now

Posted July 22, 2015    Dave Shackleford

There’s plenty of problems we don’t have great options for in InfoSec today. Malware is a pain point that keeps evolving rapidly. 0-day exploits are tough to prepare for. Privileged account management? We got this. We know the root causes, we know how it manifests, we know how to get it under control effectively, and there are great technology solutions that are enterprise-class.

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