Uploaded October 2019 | Updated September 2026, 4 days ago
In December last year, I released the async_wake exploit for iOS 11.1.2. In this talk, I'll cover how each step of the exploit worked and discuss in depth each mitigation which was defeated along the way.
I'll focus on what was supposed to make exploitation hard, what techniques other public exploits would have used in earlier iOS versions, and what mitigations we might see in iOS 12 and beyond (and how to break those too!).
In December last year, I released the async_wake exploit for iOS 11.1.2. In this talk, I'll cover how each step of the exploit worked and discuss in depth each mitigation which was defeated along the way.
I'll focus on what was supposed to make exploitation hard, what techniques other public exploits would have used in earlier iOS versions, and what mitigations we might see in iOS 12 and beyond (and how to break those too!).

![DEF CON 27 - Intro to Embedded Hacking-How you can find a decade old bug in widely deployed devices
From small business to large enterprise, VOIP phones can be found on nearly every desk. But how secure are they? What if your phone was spying on every conversation you have?
This talk is an introduction to hardware hacking and as a case study Ill use the [REDACTED] Deskphone, a device frequently deployed in corporate environments. Ill use it to introduce the tools and methodology needed to answer these questions.
During this talk, attendees will get a close up look at the operations of a hardware hacker, including ARM disassembly, firmware extraction using binwalk, micro-soldering to patch an EEPROM and get a root shell over UART, and ultimately uncover an already known decade-old bug that somehow remained unnoticed in the devices firmware.
Beyond the case study I will also address alternative tactics; some did not work, others may have but were not the lowest-hanging fruit. When it comes to hardware hacking, the process is as important as the result; knowing that there are multiple ways to reach the end goal helps researchers remain confident when hurdles arise. After the talk, attendees will have an increased distrust towards always-on devices; however, they will have the background knowledge to investigate the products and systems they encounter daily.
Intro to Embedded Hacking-How you too can find a decade old bug in widely deployed devices. [REDACTED] Deskphones, a case study. DEF CON 27 - Intro to Embedded Hacking-How you can find a decade old bug in widely deployed devices](https://i.ytimg.com/vi/OW95vw2_BxQ/mqdefault.jpg)








