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Mac Hacked In Contest... Sort Of
by , 7:55 AM EDT, April 23rd, 2007
The CanSecWest 2007 security conference hosted a "Hack a Mac" contest where contestants worked to gain unauthorized access to a Mac OS X system. Yes, there was a winner, but not until the contest rules were relaxed to the point that someone actually could win.
Shane Macaulay and Dino Dai Zovi won a US$10,000 prize and the compromised Mac for their efforts which included discovering a bug in Safari that allowed them to use a maliciously crafted URL to gain user level access to the computer. The vulnerability is known as a "zero day exploit," meaning an exploit is released the same day it is announced, that there is little or no protection for.
In this case, the security flaw requires a local user attempting to open the malicious URL with Safari before unauthorized user level access can be obtained. Apple has been alerted to the security flaw, and the exploit has not been released to the public.
The original rules required the attackers to gain root level access to a Mac running Mac OS X 10.4.9 with the latest security updates from a different point on the same network. Contestants were not able to gain root access to a second Mac during the two-day conference even after the rules were modified to allow for local attacks using Safari.
Although the prospect of a potential Safari exploit that allows unauthorized access to a Mac is a serious concern, it also underscores the importance of user vigilance. Clicking a Web site link that's in am email message from someone you don't know, for example, is a really bad idea. The URL may be legit, or it could take you to a Web site that you would rather not see, or it could be constructed to allow someone else to gain control of your Mac.
Unfortunately, many news outlets are taking advantage of this potential exploit to run sensationalized headlines and to incorrectly state that the Mac used in the contest was remotely hacked. It appears that zero day exploits and remote hacks for Windows PCs are par for the course, but a potential Mac exploit - now that's news.
Observer Comments
Mon Apr 23, 2007 9:44 am Subject: Wow, but you know, nobody really cares...
Because thats why CNET explodes every time the words "security", "vulnerable" and "Apple" come within 3 sentences of each other, because the mainstream press and those among them who cash paychecks from Redmond aren't desperately hoping for something to make OSX not seem 1000x secure than Windows, because the only reason Macs aren't all virus infested bots right now is because the hackers don't mess with something with such a small marketshare.
Its all BS, because obviously 10k doesn't get thrown down and then only collected when the rules of the challenge are substantially easied, for a system nobody in that field cares about. They want that exploit so bad they can taste it, because guess what if you find a major apple hole and manage to write a successful exploit that functions in the wild on reasonably secure hardware you are gonna be one paid dude, companies like Symantec and MS will be bidding for the right to hop on that guys jock.
Also, no computer is idiot proof, if somebody did send you an email/IM with this exploit embedded with it and you failed to screen it out as spam then you screwed up, IMO.
I guess if I told you the code for my alarm and where the hidden kay was, you could break into my house. Geez, what a load. The Windoze folks just lose it at the chance to slam OS X security. And I love the 5-10% market share they always spout. That is the TOTAL market, including the hapless corporations who are locked into MS for cost reasons. In the personal market, Apple's share is much higher. Just look at the sales numbers for Dell, HP and Apple. Those are just iPods Apple is selling.
Mon Apr 23, 2007 11:48 am Subject: Adobe
QuoteGuest wrote:
why would microsoft want to hire a guy who can crash a mac? don't you just need to install an adobe application to do that?
I use Adobe products almost every day, Illustrator, inDesign, PhotoShop, Acrobat, GoLive, Bridge, usually several open at the same time. I rarely have a crash, and when I happens it always GoLive.
Mon Apr 23, 2007 11:59 am Subject: Except the fact that they cheated to get this result
Sure there might be another exploit but is it really that serious considering how they ran this contest. First they gave out the IP address which is something that would be very hard to do in the real world unless your firewall is turned off on your router and on your Mac OS. Second they cheated by lowering the standard security settings. There has yet to be any live Mac hacked and proven so since it's release in beta.
That fact remains today that the only way anyone has been able to break in is by cheating.
Actually, the "exploit" was to read a file in user space. My understanding is that the other exploit was to read a file that was readable only by root.
So we now have a known Java in browser (not just Safari) exploit. If a user follows a malicious link, the remote site can potentially obtain the contents of a file, possibly only a known file (though if you can get a directory listing then everything readable becomes 'known').
It is correct to call it a "potential" exploit. It's a real, demonstrable exploit useable under real-world conditions, but there are currently no instances of it in the wild, and it is likely to be patched before an such "real world" exploits can occur.
Note also that it is not a virus, worm, or similar. It provides *read-only* access. It does not infect the computer, or otherwise provide direct control of it. In order to gain control via this exploit, the hacker would need to obtain a file containing some form of key to allow them to log in.
Tue Apr 24, 2007 12:05 am Subject: I'm no security expert, but I've used one "in the wild&
Tue Apr 24, 2007 11:47 am Subject: Re: I'm no security expert, but I've used one "in the w
QuoteAnonymous wrote:
Obscurity, politeness, and fear for the repurcussions of being found doing something bad is all I can come up with.
Two things guest, please post that link here, I volunteer myself as a guinea pig to test this because I really want to see it, not being sarcastic please do post it here if you still have it (at least the original forum page you mentioned if not the exploit itself).
Second, I really think you're giving hackers and people way too much credit there, they would love to take Mac users down a peg, if for no other reason than it would make them gods at Slashdot for weeks.
QuoteAnonymous wrote:
You'd need to have whatever version of OSX was current at the time to demonstrate it of course.
Ah, yeah without a more specific build number to go with I don't really feel like going to the effort of rebuilding my OSX 10.4 system update by update until I hit the right one to test this vulnerability, just too time consuming, I misunderstood and thought you meant something in the last 3-6 months (which I might have a backup copy of that build of my startup disk already), my bad
I do vaguely remember this one though, I thought it was patched within a couple of days of when the code was released but I may not by recalling that correctly or thinking of another vulnerability.
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