Bulk crawl and get Link about neccessary Packages that needed to mitigate CVE-2016-5195 with SystemTap on CentOS

get_package.sh

#!/bin/sh

#####################################################################	
#    Get Packages for CVE-2016-5195 mitigation with SystemTap       #
#        NOTE: SOME CASE IT DOESN'T WORK WITH CentOS 5     		    #
# Good for bulk download and fix system with various kernel version #
#                 Written by Levis Nickaster                        #
#####################################################################
# get kernel version and linux archilecture
# Usage: ./get_info.sh <kernel_version> (i686|x86_x64)
# Or it can detects automatically. To automate the mitigation process, refer to :
# https://gist.githubusercontent.com/levisre/202a2462eeacad119d6f8e2cd79c9bed/raw/aeb553524cc640ea8852352327aef703dcb10587/cve-2016-5195_mitigation.sh

echo -e "Collecting infomation..."

if [ ! -z $1 ]; then
	KERNEL_VER=$1
else
	KERNEL_VER=$(uname -r)
fi
if [ ! -z $2 ]; then
	LINUX_ARCH=$2
else
	LINUX_ARCH=$(uname -m)
fi
echo -e "Kernel Versioon: "$KERNEL_VER
echo -e "System Type: "$LINUX_ARCH
DEBUGINFO_PKG1='kernel-debuginfo-'$KERNEL_VER
DEBUGINFO_PKG2='kernel-debuginfo-common-'$LINUX_ARCH'-'$KERNEL_VER
DEVEL_PKG='kernel-devel-'$KERNEL_VER

if [ $LINUX_ARCH == 'i686' ]; then
	URL_ARCH='i386'
else
	URL_ARCH=$LINUX_ARCH
fi
#Official Centos URL
ROOT_URL='http://debuginfo.centos.org/'
MAINLINE_URL='http://mirror.centos.org/centos/'

#Determine Centos Version
if [[ $KERNEL_VER =~ "el6" ]]; then
	echo "Type: CentOS 6"
	DBG_URL=$ROOT_URL'6/'$URL_ARCH'/'
	CORE_URL=$MAINLINE_URL'6/os/'$URL_ARCH'/Packages/'
	KDEV_URL=$MAINLINE_URL'6/updates/'$URL_ARCH'/Packages/'
elif [[ $KERNEL_VER =~ "el7" ]]; then
	echo "Type: CentOS 7"
	DBG_URL=$ROOT_URL'7/'$URL_ARCH'/'
	CORE_URL=$MAINLINE_URL'7/os/'$URL_ARCH'/Packages/'
	KDEV_URL=$MAINLINE_URL'7/updates/'$URL_ARCH'/Packages/'
elif [[ $KERNEL_VER =~ "el5" ]]; then
	echo "Type: CentOS 5 (Note: some case it doesn't work well, brokenlink in debuginfo and kernel-devel)"
	DBG_URL=$ROOT_URL'5/'$URL_ARCH'/'
	CORE_URL=$MAINLINE_URL'5/os/'$URL_ARCH'/CentOS/'
	KDEV_URL=$MAINLINE_URL'5/updates/'$URL_ARCH'/Packages/'
fi

TARGET_HOSTNAME=$(hostname)

#parse URL and get info about packages
echo "Fetching from "$CORE_URL
curl -s $CORE_URL > /tmp/index.parse
DBG_URL1=$DBG_URL$DEBUGINFO_PKG1'.rpm'
DBG_URL2=$DBG_URL$DEBUGINFO_PKG2'.rpm'
DEVEL_URL=$KDEV_URL$DEVEL_PKG'.rpm'
STAP_URL1=$CORE_URL$( cat /tmp/index.parse | grep -Po "systemtap-[0-9]([^\s>n])*.rpm\"" | rev | cut -c 2- | rev )
STAP_URL2=$CORE_URL$( cat /tmp/index.parse | grep -Po "systemtap-devel([^\s>nr])*.rpm\"" | rev | cut -c 2- | rev )
STAP_URL3=$CORE_URL$( cat /tmp/index.parse | grep -Po "systemtap-runtime([^\s>vg])*.rpm\"" | rev | cut -c 2- | rev )
STAP_URL4=$CORE_URL$( cat /tmp/index.parse | grep -Po "systemtap-client([^\s>])*.rpm\"" | rev | cut -c 2- | rev )
if [[ $KERNEL_VER =~ "el7" ]]; then # only exist in CentOS 7
	echo "true"
	STAP_URL5=$CORE_URL$( cat /tmp/index.parse | grep -Po "mokutil([^\s>])*.rpm\"" | rev | cut -c 2- | rev )
else
	STAP_URL5=""
fi
rm /tmp/index.parse
#Print output to file
printf "Host: $TARGET_HOSTNAME\nList Packages:\n$DBG_URL1\n$DBG_URL2\n$DEVEL_URL\n$STAP_URL1\n$STAP_URL2\n$STAP_URL3\n$STAP_URL4\n$STAP_URL5\n"