Researchers Uncover macOS and Safari Exploits at Pwn2Own 2017

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The seventeenth annual CanSecWest security conference is underway in downtown Vancouver, British Columbia, where researchers are competing in the 10th anniversary Pwn2Own computer hacking contest for over $1 million in prizes.

Day one results have already been published over at the Zero Day Initiative website, with a couple of successful Mac-related exploits already appearing in the list of achievements. Independent hackers Samuel Groß and Niklas Baumstark landed a partial success and earned $28,000 after targeting Safari with an escalation to root on macOS, which allowed them to scroll a message on a MacBook Pro Touch Bar.


In a partial win, Samuel Groß (@5aelo) and Niklas Baumstark (@_niklasb) earn some style points by leaving a special message on the touch bar of the Mac. They used a use-after-free (UAF) in Safari combined with three logic bugs and a null pointer dereference to exploit Safari and elevate to root in macOS. They still managed to earn $28,000 USD and 9 Master of Pwn points.

Later in the day, Chaitin Security Research Lab also targeted Safari with an escalation to root on macOS, finding success using a total of six bugs in their exploit chain, including "an info disclosure in Safari, four type confusion bugs in the browser, and a UAF in WindowServer". The combined efforts earned the team $35,000.

The participating teams earned a total of $233,000 in prizes on day one, including a leading $105,000 earned by Tencent Security, according to published details. Other software successfully targeted by contestants include Adobe Reader, Ubuntu Desktop, and Microsoft Edge on Windows.

Apple representatives have attended the Pwn2Own contest in the past, and affected parties are made aware of all security vulnerabilities discovered during the contest in order to patch them. Pwn2Own day two begins today at 8:30 a.m. Pacific and will involve additional exploit attempts against macOS and Safari.

Top Rated Comments

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46 months ago
These people are pretty smart. Gotta say.
Score: 6 Votes (Like | Disagree)
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46 months ago

So if I'm reading this right, OS X has vulnerabilities in which hackers shown off an ability to exploit.

Seems kind of disturbing to me, or am I reading more into it then I ought too?

Reading more into it. This is a yearly event. Every year they expose vulnerabilities in every OS. They provide each vendor with the vulnerability so it can be patched.
Score: 3 Votes (Like | Disagree)
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46 months ago

So if I'm reading this right, OS X has vulnerabilities in which hackers shown off an ability to exploit.

Seems kind of disturbing to me, or am I reading more into it then I ought too?

It's a yearly competition, and the entire point is to find, disclose, and get these types of exploits closed. Note that they almost always spend months pre-planning (so avoid those "____ hacked in 30 seconds!" clickbait headlines) and it takes several combined exploits to get the results they want....as well as hands on with the computer.
Score: 3 Votes (Like | Disagree)
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46 months ago

Independent hackers Samuel Groß and Niklas Baumstark landed a partial success and earned $28,000 after targeting Safari with an escalation to root on macOS, which allowed them to scroll a message on a MacBook Pro Touch Bar.

Haha they get 28.000 for that? I've seen developers create stuff like this and called it an app or feature. ;) :rolleyes: o_O

You gotta love the Touch Bar folks. They look so pretty, don't they. Even my sister can get dates now.
Score: 2 Votes (Like | Disagree)
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46 months ago

I was always under the impression Mac has enjoyed many years of very little exposure in terms of exploits or viruses mainly because hackers focused on the big fish like Microsoft. Microsoft's OS is used for business all over the world. As MacOS gains in popularity so will the number of hacks, viruses, and malware. Just a matter of time.

And while I'm purely speculating, the size of the Microsoft target is such that, perhaps, the prize money offered is insufficient - better to keep selling exploits on the black market. Leaving the public relations value aside ("Windows exploit? Ho hum!"), a target ten times the size justifies ten times the prize.
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Apple representatives have attended the Pwn2Own contest in the past?? That's interesting. If it were my company I'd want someone at EVERY ONE of these kinds of contests.

This is standard news reportage. Unless you can report, as a fact, that Apple sends someone to "EVERY ONE of these kinds of contests," you fall back upon what you know is true.

It's highly likely that Apple does dispatch staff to every one of these kinds of contests. In addition to uncovering exploits, they'd seem to be pretty good places for recruiting talent, keeping in touch with the movers and shakers, etc. But "highly likely" is not provable fact, and chances are, due to the nature of travel, even if Apple dispatched staff to every such event, it doesn't mean they always arrived.
Score: 1 Votes (Like | Disagree)
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46 months ago
Really cool work. I am fascinated at how they do such stuff. I have no idea on how you'd even start.
Score: 1 Votes (Like | Disagree)

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