Apple patches Bash vulnerability in OS X

Apple released a patch Monday for Shellshock, a serious software vulnerability disclosed last week, although the company had said it posed no risk to most users.

Shellshock is the nickname for a flaw in the GNU Bourne Again Shell, or Bash, which is a command-line shell processor used for sending commands to an operating system. It is prevalent in Unix and Linux systems.

The flaw in Bash, which has been present for two decades, could allow an attacker to take complete control of a computer if the software is remotely accessible. An attacker could append malicious commands into a CGI (Common Gateway Interface) request, which would then be processed by a server.

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