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korvi.txt

korvi.txt
Posted Sep 13, 2006
Authored by cdg393

KorviBlog suffers from a cross site scripting vulnerability. Advisory written in French.

tags | advisory, xss
SHA-256 | 7a0f6f0c625b862ac1d424180b07e9d157d6ccdb878a73a6e26c103e8efb0986

korvi.txt

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[-] Produit                      : KorviBlog

[-] Langage : PHP

[-] Site web officiel : http://korvi.jdhosts.net/

[-] Page vulnérable : livre_or.php

[-] Faille de sécurité : Cross Site Scripting Permanent

[-] Explications :

Ligne 4 : livre_or($_POST['prenom'], $_POST['emailFrom'],
$_POST['body'], time());

Les variables $_POST['prenom'] , $_POST['emailFrom'] et $_POST['body']
ne sont pas correctement filtrées avant leur affichage, ce qui permet
l'injection de code malicieux via le formulaire de cette page.

[C]orrection :

Pour corriger le problème, il suffit d'appliquer la fonction
htmlentities() à ces trois variables :

livre_or( htmlentities($_POST['prenom']),
htmlentities($_POST['emailFrom']), htmlentities($_POST['body']), time());

[R]emarque :

Aucune verification des données entrées n'est faite, en laissant par
exemple les champs prénom email message vides le message est
posté.

[C]redit : cdg393
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