Infiltrate Security Conference OPEN CFP

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Bypassing Mitigations by Attacking JIT Server in Microsoft Edge

Exploit Development

With the Windows 10 Creators Update, to the shock and horror of exploit writers everywhere, Microsoft introduced Arbitrary Code Guard (ACG). ACG’s goal is to make it impossible to allocate new executable memory or modify existing executable memory in the protected process. Additionally, to be able to support just-in-time (JIT) compilation in Chakra (Edge’s JavaScript engine), Microsoft took out JIT into a separate process. But just how useful and how foolproof ACG currently is? In this talk we’ll attempt to answer those questions, with a special focus on Chakra and the JIT server. We’ll examine the attack surface of the JIT server and show examples of several types of issues in JIT server and Chakra that could lead to CFG and ACG mitigation bypasses.

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Interested in Speaking?

We are pleased to announce the Call For Papers for INFILTRATE 2018 is now open. If you would like to present and have an offense-focused-fresh-content presentation, please submit an abstract, Bio and headshot to This information will be included on our Open CFP site, here, where the public can vote on which presentations they are most interested in seeing at INFILTRATE. Call for papers will close on December 14th, 2017. Shortly after this date, the winning speakers will be notified.

Some of the benefits of speaking at INFILTRATE are:

  • A trip to Miami Beach during the non-gates-of-hell hot season
  • A stay at one of the premier luxury resorts in the area
  • A no-bullshit environment where you don't have to be apologetic about
  • Ability to participate in the 1st ever profit sharing conference