Patch your BASH shell - from Ars Technica:
Bug in Bash shell creates big security hole on anything with *nix in it
The Bash vulnerability, now dubbed by some as "Shellshock," has been reportedly found in use by an active exploit against Web servers. Additionally, the initial patch for the vulnerability was incomplete and still allows for attacks to succeed, according to a new CERT alert. See Ars' latest reportfor further details, our initial report is below.
A security vulnerability in the GNU Bourne Again Shell (Bash), the command-line shell used in many Linux and Unix operating systems, could leave systems running those operating systems open to exploitation by specially crafted attacks. “This issue is especially dangerous as there are many possible ways Bash can be called by an application,” a Red Hat security advisory warned.
The bug, discovered by Stephane Schazelas, is related to how Bash processes environmental variables passed by the operating system or by a program calling a Bash-based script. If Bash has been configured as the default system shell, it can be used by network–based attackers against servers and other Unix and Linux devices via Web requests, secure shell, telnet sessions, or other programs that use Bash to execute scripts.
Because of its wide distribution, the vulnerability could be as wide-ranging as the Heartbleed bug, though it may not be nearly as dangerous. The vulnerability affects versions 1.14 through 4.3 of GNU Bash. Patches have been issued by many of the major Linux distribution vendors for affected versions, including:
A test on Mac OS X 10.9.4 ("Mavericks") by Ars showed that it also has a vulnerable version of Bash. Apple has not yet patched Bash, though it just issued an update to "command line tools."
A heads up... Running CentOS on a few machines at work and home.
