After searching multiple places on how to update bash to avoid Shellsock, this seemed the most straightforward that worked just fine on my Macbook.

Lots of stuff on this Stack Overlflow thread security - How do I recompile Bash to avoid Shellshock (the remote exploit CVE-2014-6271 and CVE-2014-7169)? - Ask Different

This worked just fine for me:

cd ~/tmp  
mkdir bash-fix  
cd bash-fix  
curl | tar zxf -  
cd bash-92/bash-3.2  
curl | patch -p0  
curl | patch -p0  
cd ..  
sudo xcodebuild  
sudo cp /bin/bash /bin/bash.old  
sudo cp /bin/sh /bin/sh.old  
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 cp build/Release/bash /bin  
sudo cp build/Release/sh /bin  
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