The contest kicked off on Wednesday with security researchers Amat Cama and Richard Zhu teaming up against Safari. The duo successfully exploited the browser and escaped the sandbox by using a combination of an integer overflow, heap overflow, and brute force technique, earning them $55,000.
Later in the day, a trio of Niklas Baumstark, Luca Todesco, and Bruno Keith targeted Safari with a kernel elevation. They demonstrated a complete system compromise, but it was only a partial win since Apple supposedly already knew of one of the bugs used in the demo. They still netted $45,000.
In total, participants were awarded $240,000 on day one of Pwn2Own. Day two of the contest is currently underway. All exploits discovered during the contest are reported to the necessary companies like Apple so they can be patched.