http://www.theregister.co.uk/2015/08..._exploit_wild/

"The amusing vulnerability in Apple's OS X that grants
administrator-level access to anyone who asks is being exploited in
the wild by malware. Yeah, malware exists for Macs, this isn't the
1990s.

Anyone logged in to a vulnerable OS X computer, or any software
running on it, can use the security hole to gain the same privileges
as the powerful root user, meaning they can install new programs,
change files, remove or add new users, wreck the system, and so on, at
will.

According to Adam Thomas of Malwarebytes, dodgy software distributed
on the internet is now exploiting the vulnerability to inject the
VSearch and Genieo adware plus the MacKeeper junkware on to Macs, and
point users at an app to download from the official App Store."

... more
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Regards,

Eric Stevens