BeyondTrust

Security in Context: The BeyondTrust Blog

Welcome to Security in Context

Bringing you news and commentary on solutions and strategies for protecting critical IT infrastructure in the context of your business.

Mmm, Smells Like 0day

Posted September 17, 2012    BeyondTrust Research Team

Just when you thought we were out of the woods, Internet Explorer 0day shows up, in the wild. Here’s what you need to know about the vulnerability:

  • Internet Explorer 6, 7, 8, and 9 are vulnerable (UPDATE: Out-of-band patch available now!)
  • Use-after-free when the CMshtmlEd object is deleted and then the same area in memory is used by CMshtmlEd::Exec()
  • Payload delivered via heap spray

It is suspected that this 0day is utilized by the same group that has been using the latest Java 0day to spread the Poison Ivy remote admin tool (RAT). Here’s how the attack is playing out, in the wild:

  • Malicious website hosts exploit.html and determines if target is running IE 7 or IE 8
  • exploit.html loads Moh2010.swf, which then performs a heap spray and loads an iframe
  • Protect.html is loaded and triggers the vulnerability
  • Poison Ivy is then downloaded (111.exe)

Once infected, the payload creates the following files and services:

  • C:\WINDOWS\system32\mspmsnsv.dll
  • WmdmPmSN service
The Metasploit module is reliable for IE 7 and IE 8 in Windows XP, but requires the Java Runtime Environment (JRE6 only, the module does not work with JRE7) for exploitation of IE 8 and IE 9 in Windows 7.
Blink and Retina Protection Agent have been verified to succesfully prevent exploitation of this vulnerability through its Application Protection functionality. Additionally, EMET 3.0 helps mitigate exploitation of this vulnerability.
You can detect vulnerable systems using Retina and Retina CS, via the following audit:
17089 – Microsoft Internet Explorer CMshtmlEd::Exec() Code Execution (Zero-Day)
Screenshot of Retina CS Audit 17089

Screenshot of Retina CS Audit 17089

Tags:
, , , , , ,

Leave a Reply

Additional articles

Sudo_logo

Don’t Create a Different sudoers File for Each System

Posted May 20, 2015    Randy Franklin Smith

What if you have multiple Linux and/or Unix systems? Sudo management can become onerous and unwieldy if you try to manage a different sudoers file on each system. The good news is that sudo supports multiple systems.

password-safety

What Does Microsoft Local Administrator Password Solution Really Do?

Posted May 19, 2015    Morey Haber

LAPS is a feature that allows the randomization of local administrator accounts across the domain. Although it would seem that this capability overlaps with features in BeyondTrust’s PowerBroker Password Safe (PBPS), the reality is it is more suited for simple use cases such as changing the local Windows admin account and not much more.

Tags:
, ,
webinar_ondemand

On Demand Webinar: Securing Windows Server with Security Compliance Manager

Posted May 14, 2015    BeyondTrust Software

On Demand Webinar: Security Expert Russell Smith, explains how to use Microsoft’s free Security Compliance Manager (SCM) tool to create and deploy your own security baselines, including user and computer authentication settings.

Tags:
, ,