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CoolForum Input Validation Flaws Permit SQL Injection and Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1013474
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SecurityTracker URL: http://securitytracker.com/id?1013474
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Mar 18 2005
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Impact: Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Exploit Included: Yes
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Version(s): 0.8 and prior versions
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Description: Romano_45 reported several input validation vulnerabilities in CoolForum. A remote user can conduct cross-site scripting attacks. A remote user can also inject SQL commands.
The 'avatar.php' script does not properly validate user-supplied input in the 'img' parameter. A remote user can create a specially
crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser.
The code will originate from the site running the CoolForum software and will run in the security context of that site. As a result,
the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site,
access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
A demonstration exploit URL is provided:
avatar.php?img=<script>alert(document.cookie)</script>
The 'admin/entete.php'
script does not properly validate user-supplied input in the 'pseudo' parameter. A remote user can submit a specially crafted HTTP
POST request to inject SQL commands. If magic_quotes is set to 'off', this vulnerability can be exploited. Some demonstration
exploit examples are provided:
'or 1=1 into outfile '/repertoire/du/site/cf_users.txt
'Union SELECT options,valeur,0,0,0 FROM
CF_config into outfile
'/reperoire/serveur/cf_config.txt
The 'register.php' page in version 0.8 does not properly validate
the user-supplied 'login' parameter. If the 'confirmation by mail' option is enabled, a remote user can supply a specially crafted
URL to execute SQL commands on the underlying database.
A demonstration exploit URL is provided:
http://[target]/register.php?action=confirm&login='or
1=1 into outfile
'/var/www/html/cf_users_with_magic_quotes_on.txt
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Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the
CoolForum software, access data recently submitted by the target user via web form to the site, or take actions on the site acting
as the target user.
A remote user can execute SQL commands on the underlying database.
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Solution: The vendor has released a fixed version (0.8.1), available at:
http://www.coolforum.net/index.php?p=dlcoolforum
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Vendor URL: www.coolforum.net/ (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: Romano <romano_45@hotmail.com>
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Message History:
None.
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Source Message Contents
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Date: Thu, 17 Mar 2005 16:20:22 +0000
From: Romano <romano_45@hotmail.com>
Subject: Failles CoolForum 0.8
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Problème :
**********
- XSS Non permanent (toutes versions)
- Injection SQL si les magic_quotes sont désactivées (toutes version)
- Injection SQL avec ou sans magic_quotes mais l'option de configuration du
forum "Confirmation des inscriptions par mail"
doit être activée. (Uniquement 0.8 !)
Détails :
*********
1) XSS non permanent :
----------------------
Il suffit donc de faire :
avatar.php?img=<script>alert(document.cookie)</script>
2) Injection SQL avec magic_quote désactivées
----------------
Page : admin/entete.php
Le problème, c'est que $_POST[pseudo] n'est pas filtré.
on peut donc sauvegarder la table users en insérant la valeur suivante dans
la variable pseudo du formulaire :
'or 1=1 into outfile '/repertoire/du/site/cf_users.txt
Ou par exemple pour extraire la table de configuration on peut faire :
'Union SELECT options,valeur,0,0,0 FROM CF_config into outfile
'/reperoire/serveur/cf_config.txt
3) Injection SQL avec ou sans magic_quote mais avec l'option de confirmation
par mail activée :
--------------------------------------------------------------------------------------------
Page register.php :
L'exploitation est strictement la même, il suffit de faire :
http://[target]/register.php?action=confirm&login='or 1=1 into outfile
'/var/www/html/cf_users_with_magic_quotes_on.txt
Pour copier le contenu de la table users dans le fichier texte.
Sécurisation :
**************
Mettre à jour sa version par la 0.8.1
Crédits :
*********
Romano <romano_45@hotmail.com>
_________________________________________________________________
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http://g.msn.fr/FR1001/866 la solidarité à portée de click
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