Mac OS X fix for Bash bug

bash_fix.sh

#
# Source
# http://apple.stackexchange.com/questions/146849/how-do-i-recompile-bash-to-avoid-the-remote-exploit-cve-2014-6271/146851#146851
#

# Test for vulnerablity
# $ env x='() { :;}; echo vulnerable' bash -c 'echo hello'

# If you want to disable auto-imported functions, uncomment the following
# export ADD_IMPORT_FUNCTIONS_PATCH=YES
mkdir bash-fix
cd bash-fix
curl https://opensource.apple.com/tarballs/bash/bash-92.tar.gz | tar zxf -
cd bash-92/bash-3.2
curl https://ftp.gnu.org/pub/gnu/bash/bash-3.2-patches/bash32-052 | patch -p0    
curl https://ftp.gnu.org/pub/gnu/bash/bash-3.2-patches/bash32-053 | patch -p0  
# See note above about ADD_IMPORT_FUNCTIONS_PATCH
[ "$ADD_IMPORT_FUNCTIONS_PATCH" == "YES" ] && curl http://alblue.bandlem.com/import_functions.patch | patch -p0
cd ..
xcodebuild
build/Release/bash --version # GNU bash, version 3.2.53(1)-release
build/Release/sh --version   # GNU bash, version 3.2.53(1)-release
sudo mv /bin/bash{,.old}
sudo cp /bin/sh{,.old}
sudo cp build/Release/bash /bin
sudo cp build/Release/sh /bin
sudo chmod a-x /bin/bash.old /bin/sh.old