Patch all Magento versions according to the advisory http://www.magentocommerce.com/blog/comments/important-security-update-zend-platform-vulnerability/, using find instead of locate and a cd $OLDDIR for multiple installations

patchMagentos.sh

#!/bin/bash

# CREATE BACKUPS BEFORE RUNNING THIS SCRIPT!

OLDDIR=$(pwd)

for m in $(find . -name "Mage.php" -not -path *var* -not -path *skin* -not -path *media* | grep -v downloader); do
        cd $OLDDIR
        cd $(dirname $(dirname $m)) || (echo && continue) # old locate db
        MAGE_VERSION=$(php -d error_reporting=0 -r "require 'app/Mage.php'; Mage::app(); echo Mage::getVersion();")
        if echo $MAGE_VERSION | egrep -q "^[0-9.]+$"; then
                if [ $MAGE_VERSION "<" 1.4.0.0 ] || [ $MAGE_VERSION ">" 1.7.0.1 ]; then
                        echo -e "No patch available for version $MAGE_VERSION in $(pwd)\n"
                        continue
                elif [ $MAGE_VERSION "<" 1.4.2.0 ]; then
                        URL=http://www.magentocommerce.com/downloads/assets/1.7.0.2/CE_1.4.0.0-1.4.1.1.patch
                elif [ $MAGE_VERSION "<" 1.5.0.0 ]; then
                        URL=http://www.magentocommerce.com/downloads/assets/1.7.0.2/CE_1.4.2.0.patch
                else
                        URL=http://www.magentocommerce.com/downloads/assets/1.7.0.2/CE_1.5.0.0-1.7.0.1.patch
                fi
                echo Patching Magento $MAGE_VERSION in $(pwd)
                echo using patch $URL

                #### Remove --dry-run AT YOUR OWN RISK! ####
                curl -sS $URL | patch -p0

                echo
        else
                echo -e "Unable to determine Magento version in $m\n"
        fi
done