A critical flaw has been discovered in the High Sierra Apple Macintosh Operating System. This flaw allows anyone to login as the “root” user by leaving the password blank. On the MacOS, and other Unix derivatives, the “root” account is a super-user account with full control of the system. This is a MAJOR security problem for Apple and they are working on a fix right now. The flaw was discovered and immediately made known to the public, which means Apple has had “zero days” to work on a fix.
Apple has instructions for setting a root password which will prevent unauthorized access: https://support.apple.com/en-us/HT204012. So if you are a MacOS user, you should set this password immediately.
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ACE Technology Group