Upgrade Bash from source in response to shellshock

gistfile1.sh

#!/bin/sh

# build and install a fully patched bash 4.3 to mitigate shellshock
#
# to determine vulnerability:
# %> env x='() { :;}; echo vulnerable' bash -c "echo this is a test"

mkdir bash_src
cd bash_src
wget http://ftp.gnu.org/gnu/bash/bash-4.3.tar.gz
tar xzf bash-4.3.tar.gz
cd bash-4.3
for i in $(seq -f "%03g" 0 25); do
  wget http://ftp.gnu.org/gnu/bash/bash-4.3-patches/bash43-$i
  patch -p0 < bash43-$i
done
./configure && make && make install
cd ../..
rm -rf bash_src