Critical OS X Flaw Grants Mac Keychain Access to Malware
Back in July, a security researcher disclosed a zero-day vulnerability in Mac OS X that allowed attackers to obtain unrestricted root user privileges with the help of code that even fits in a tweet. The same vulnerability has now been upgraded to again infect Mac OS X machines even after Apple fixed the issue last month. The privilege-escalation bug was once used to circumvent security 
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