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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

gartner market guide image - aug 2014

Introducing the Gartner Market Guide for Privileged Account Management

Posted July 29, 2014    Chris Burd

Gartner recently released a new Market Guide for Privileged Account Management (PAM), and we’d like to share a complimentary copy with you. The report includes PAM market analysis and direction, vendor overviews, and recommendations for selecting PAM solutions for your environment. BeyondTrust is one of two representative vendors (out of 20) to address all solution…

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Integrating Least Privilege and Password Management to Solve Account Security Challenges

Integrating Least Privilege and Password Management to Solve Account Security Challenges

Posted July 24, 2014    Morey Haber

There is a reason all BeyondTrust Privileged Account Management (PAM) solutions share the PowerBroker name: They all inherently enable you to reduce user-based risk and can be integrated under a centralized IT risk management platform. Here’s one common use case that demonstrates how this integration changes the playing field. Consider the challenge of privileged access:…

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PowerBroker Password Safe Password Age Report

Reshaping Privileged Password Management with Password Safe 5.2

Posted July 21, 2014    Martin Cannard

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