--nextPart1778278.0047i3CAzo
Content-Type: text/plain;
  charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline

Advisory: Authentication bypass in phpBannerExchange

RedTeam identified two SQL injections in phpBannerExchange. It is
possible to bypass user authentication with them.


Details
======
Product: phpBannerExchange
Affected Versions: All versions up to phpBannerExchange 2.0 RC5
=46ixed Versions: 2.0 RC6
Vulnerability Type: SQL injections
Security-Risk: medium
Vendor-URL: http://www.eschew.net/scripts/phpbe/2.0/ 
Vendor-Status: informed, fixed version released
Advisory-URL: http://www.redteam-pentesting.de/advisories/rt-sa-2006-004.txt 
Advisory-Status: public
CVE: CVE-2006-3012
CVE-URL: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3012 


Introduction
===========
=46rom the vendor's homepage:
phpBannerExchange is a PHP/mySQL script that allows virtually anyone
with minimal knowledge of PHP, mySQL and web hosting to run their own
banner exchange.


More Details
===========
In file "client/stats.php" the variables $login and $pass are not
sanitized at all.

[...]
42    $login=$_REQUEST['login'];
43    $pass=$_REQUEST['pass'];
[...]

If plaintext password are allowed ($usemd5 != "Y"), following SQL query
is used:

[...]
59    $result = mysql_query("select * from banneruser where
                             login='$login' AND pass='$pass'");
[...]

By passing the special character "'" it is possible to alter the SQL
query and bypass authentication.

A similar vulnerability exists in "admin/stats.php":

[...]
49    $login=$_SESSION['login'];
50    $pass=$_SESSION['pass'];
[...]
54    $result = mysql_query("select * from banneradmin where 
                             adminuser='$login' 
                             AND adminpass='$encpw'");
[...]


Proof of Concept
===============
User login or administrator login:
Use "'or''='" for both login name and password. You will be
authenticated as the first user/admin in the database.


Workaround
=========
Use PHP Magic Quotes.


=46ix
==
Upgrade to version 2.0 RC6


Security Risk
============
The security risk is high because an attacker could gain access to an
administrator account and view and alter the database and hereby
compromise the whole application.


History
======
2006-06-09 Discovery of the problem
2006-06-10 Vendor is informed
2006-06-12 Vendor releases fixed version

References
=========
[1] http://www.eschew.net/scripts/phpbe/2.0/ 


RedTeam
======
RedTeam Pentesting is offering individual penetration tests, short
pentests, performed by a team of specialised IT-security experts.
Hereby, security weaknesses in company networks are uncovered and can be
fixed immediately.

As there are only few experts in this field, RedTeam wants to share its
knowledge and enhance the public knowledge with research in security
related areas. The results are made available as public security
advisories.

More information about RedTeam can be found at
http://www.redteam-pentesting.de. 

=2D- 
RedTeam Pentesting            Tel.: +49-(0)241-963 1300
Dennewartstr. 25-27           Fax : +49-(0)241-963 1304
52068 Aachen http://www.redteam-pentesting.de 

--nextPart1778278.0047i3CAzo
Content-Type: application/pgp-signature

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.2.2 (GNU/Linux)

iQEVAwUARJFARNG/HXWsgFSuAQLXDwgAt9UmmdYhheuD6PYlMUABjWmzFwKyZNnP
HY4qv2gVVqVINLH5Wmc4N8ijq3zhj9l777JuGXtrIkdJ0fzfOTJ4oCATa1ssEA0F
MYJgm6M9zY8aPLsUHXC8iewxIe1eYfqSymGKyFwlUvy2nir6wB2AXjn1Dv5YyIw2
J0d9kWNpgYVlt7Lcbs6kMhZg7zP/HjZVBMmD1o73MwdrXSKaXSgdwNsrnGKxz36o
NIb7xr6JWsLjayNFYbm5o1puQI465KJ8Phz7LArgM96RxQlb9ljz2xHiwC16045r
eFpFT29tXcnqDu8W1Nd/dKd0NG6L4ZvIk+/WOY2UjtTJ4Ao6urBHIg==6oa4
-----END PGP SIGNATURE-----

--nextPart1778278.0047i3CAzo--