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Unfortunately, the UAF had already been corrected in the beta version of the browser, but this bug chain still netted them a partial win, garnering them ,000 and 9 Master of Pwn points.
They employed a use-after-free (UAF) in Safari combined with three logic bugs and a null pointer dereference to exploit Safari and elevate their privileges to root in mac OS.
The first day of Pwn2Own 2017 has come to a close, and so far, we’ve awarded 3,000 USD and 45 points for Master of Pwn.
Today saw five successful attempts, one partial success, two failures, and two entries withdrawn.
The contestants successfully demonstrated 20 different bugs in their successful exploits.
As for Master of Pwn, the Chaitin Security Research Lab currently leads the competition with 14 points.
They also let us know their research was guided by advisories released through the ZDI program.