Researchers Uncover Multiple OS X and Safari Exploits at Pwn2Own 2016 - MacRumors
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Researchers Uncover Multiple OS X and Safari Exploits at Pwn2Own 2016

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The sixteenth annual CanSecWest security conference is underway in downtown Vancouver, British Columbia, and researchers participating in the Pwn2Own computer hacking contest have already discovered multiple vulnerabilities in OS X and the Safari web browser on the desktop.

Safari-OS-X
On day one of the event, independent security researcher JungHoon Lee earned $60,000 after exploiting both OS X and Safari. Lee uncovered four vulnerabilities in total, including one exploit in Safari and three other vulnerabilities within the OS X operating system, according to security firm Trend Micro.

JungHoon Lee (lokihardt): Demonstrated a successful code execution attack against Apple Safari to gain root privileges. The attack consisted of four new vulnerabilities: a use-after-free vulnerability in Safari and three additional vulnerabilities, including a heap overflow to escalate to root. This demonstration earned 10 Master of Pwn points and US$60,000.

Meanwhile, the report claims that the Tencent Security Team Shield group successfully executed code that enabled them to gain root privileges to Safari using "two use-after-free vulnerabilities," including one in Safari and the other in a "privileged process." The researchers were awarded $40,000 in prize money.

The five participating teams earned a total of $282,500 in prizes on day one, including a leading $132,500 earned by the 360Vulcan Team, according to the report. Other web browsers and plugins that were successfully targeted include Adobe Flash, Google Chrome, and Microsoft Edge on Windows.


Apple representatives have attended Pwn2Own 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 began today at 9:00 a.m. Pacific and will involve additional exploit attempts against OS X and Safari.

Top Rated Comments

zorinlynx Avatar
138 months ago
This is a reminder of the reason why, even though you have a Mac, you should be careful about browsing shady websites.

Every system is exploitable, even one with a good track record like OS X. Be careful where you browse. Stay up to date on updates. This is also why I'm angered by websites that force you to turn off ad blockers; ad networks are the #1 source of malware there is.
Score: 24 Votes (Like | Disagree)
138 months ago
$60,000 for one day's work....I think I need to change jobs.
this is more than one day's work.
Score: 19 Votes (Like | Disagree)
'Dorian Avatar
138 months ago
This is a reminder of the reason why, even though you have a Mac, you should be careful about browsing shady websites.

Every system is exploitable, even one with a good track record like OS X. Be careful where you browse. Stay up to date on updates. This is also why I'm angered by websites that force you to turn off ad blockers; ad networks are the #1 source of malware there is.
Ad blockers like Adblock still allow non-intrusive and non-malicious ads. If a website makes you turn off Adblock, you might have to wonder why.

I wonder if Apple could use this in their FBI case. "Um guys... you want us to create a back door, there's contests that reward people for breaking the code. Imagine if they KNEW there was a back door and they just needed to find it."
Score: 9 Votes (Like | Disagree)
Goatllama Avatar
138 months ago
"Attempts to compromise Adobe Flash player were confounded when its doors were found to be completely open..." ;)
Score: 8 Votes (Like | Disagree)
T Coma Avatar
138 months ago
$60,000 for one day's work.
And 10 Master of Pwn points!!!
Score: 6 Votes (Like | Disagree)
CylonGlitch Avatar
138 months ago
This is a reminder of the reason why, even though you have a Mac, you should be careful about browsing shady websites.
Typically the exploits at Pwn2Own have been local side, and not remote exploits. What I mean by this is that the hackers have access to the machine and typically a user account. From there they find holes to escalate their privileges to administrator. That is what seems to be the case today (not 100% on that though). Rarely have they found a remote access method of gaining access to the computer. It is a big difference, but yes, someone having access to the machine makes it much easier than across the internet.

Now I don't know the details of the exploits found, but from the brief snippets it sounds like this is the case here as well. But one cannot be sure until the details are known (hopefully not until they are patched).

But yeah, always practice safe browsing.
Score: 4 Votes (Like | Disagree)

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