Document Title:
===============
Def Blog  CMS v1.0.2 - Multiple Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=576


Release Date:
=============
2012-05-19


Vulnerability Laboratory ID (VL-ID):
====================================
576


Common Vulnerability Scoring System:
====================================
8.5


Product & Service Introduction:
===============================
Blog tres simple d utilisation installable sur un serveur en moins de 10 minutes capable de gerer
Des articles avec commentaires
Une fiche perso avec vos informations
Vos contacts avec diverses informations les concernant
Vos creations avec possibilte pour les utilisateurs de les telecharger et d en donner une note
Le tout parametrable via un panel direct et possibilite de gerer les articles ou autres directement dessus
Possibilite de changer de template et gestion d un BBcode en Francais plus les smileys

FONCTIONNE SOUS IE ET MOZILLA 

(Copy of the Vendor Homepage: http://www.def-blog.com )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered multiple Web Vulnerabilities in Def-Blog  v1.0.2 CMS.


Vulnerability Disclosure Timeline:
==================================
2012-05-20:	Public or Non-Public Disclosure


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
1.1
Multiple SQL Injection vulnerabilities  are detected in Def-Blog  v1.0.2 Content Management System.
The vulnerability allows an attacker (remote) or local low privileged user account to inject/execute own sql commands 
on the affected application dbms. Successful exploitation of the vulnerability results in dbms & application compromise.

Vulnerable Module(s):
                                            [+] comlook.php
                                            [+] comaddok.php
                                            [+] modif.php
                                            [+] vue.php
                                            [+] redir.php
                                            [+] comlook.php
                                            [+] modifok.php
                                            [+] sup.php

1.2
Multiple persistent input validation vulnerabilities are detected in Def-Blog  v1.0.2 Content Management System.
The bugs allow remote attackers to implement/inject malicious script code on the application-side (persistent). 
Successful exploitation of the vulnerability can lead to session hijacking (manager/admin) or stable (persistent) 
context manipulation. Exploitation requires low user inter action or low privileged appliance user account.

Vulnerable Module(s):
                                            [+]imprt.php
                                            [+]modifok.php


Proof of Concept (PoC):
=======================
1.1
The sql injection vulnerabilities can be exploited by remote attackers without user inter action. For demonstration or reproduce ...

PoC:
http://127.0.0.1/defblog/comaddok.php?article=[ SQL Injection ]
http://127.0.0.1/defblog/modif.php?type=article&id=[ SQL Injection ]
http://127.0.0.1/defblog/modif.php?type=creas&id=[ SQL Injection ]
http://127.0.0.1/defblog/vue.php?id=[ SQL Injection ]
http://127.0.0.1/defblog/redir.php?id=[ SQL Injection ]


Solution - Fix & Patch:
=======================
1.1

In file: comaddok.php
In line:
19: 	$Tout = addslashes($_GET[`article`]); 
20: 	$Tout = htmlentities($Tout);

In file: comlook.php
In file: 
21: 	$Tout = addslashes($_GET[`article`]); 
22: 	$Tout = htmlentities($Tout);

In file: modif.php
In file: 
29: 	$Tout = addslashes($_GET[`id`]); 
30: 	$Tout = htmlentities($Tout);

In file: modifok.php
In file: 
27: 	$Tout = addslashes($_GET[`id`]); 
28: 	$Tout = htmlentities($Tout);

In file: sup.php
In file: 
29: 	$Tout = addslashes($_GET[`id`]); 
30: 	$Tout = htmlentities($Tout);

We must add in each of these files into the lines of:

$Tout = (int)$Tout ;

In file: imprt.php
In file: 
19: 	if (isset($_GET[`id`])) { $id = addslashes($_GET[`id`]); }

In file: redir.php
In file: 
17: if (isset($_GET[`id`])) { $id = addslashes($_GET[`id`]); }

In file: vue.php
In file: 
17: if (isset($_GET[`id`])) { $id = addslashes($_GET[`id`]); }

We must add in each of these files into the lines of:

$id = (int)$id;



1.2

In file: imprt.php
In file: 
26: 	$pseudo = addslashes($_POST[`pseudo`]); 
28: 	$TheTexte = addslashes($_POST[`TheTexte`]); 
92: 	$pseudo = addslashes($_POST[`pseudo`]); 
117: 	if($_POST[`prenom`]!=``) { $prenom=addslashes($_POST[`prenom`]); } else { $prenom=`Aucun`; }
128: 	if($_POST[`prenom`]!=``) { $prenom=addslashes($_POST[`prenom`]); } else { $prenom=`Aucun`; }
119: 	if($_POST[`loc`]!=``) { $localisation=addslashes($_POST[`loc`]); } else { $localisation=`Aucune`; }
120: 	if($_POST[`loisirs`]!=``) { $loisirs=addslashes($_POST[`loisirs`]); } else { $loisirs=`Aucun`; }
121: 	if($_POST[`emploi`]!=``) { $emploi=addslashes($_POST[`emploi`]); } else { $emploi=`Aucun`; }
122: 	if($_POST[`citation`]!=``) { $citation=addslashes($_POST[`citation`]); } else { $citation=`Aucune`; }
123: 	if($_POST[`mail`]!=``) { $mail=addslashes($_POST[`mail`]); } else { $mail=`Aucune`; }
124: 	if($_POST[`msn`]!=``) { $msn=addslashes($_POST[`msn`]); } else { $msn=`Aucune`; }
125: 	if($_POST[`yahoo`]!=``) { $yahoo=addslashes($_POST[`yahoo`]); } else { $yahoo=`Aucune`; }
126: 	if($_POST[`icq`]!=``) { $icq=addslashes($_POST[`icq`]); } else { $icq=`Aucune`; }
127: 	if($_POST[`aim`]!=``) { $aim=addslashes($_POST[`aim`]); } else { $aim=`Aucune`; }
129: 	$web=addslashes($_POST[`web`]);
157: 	$pseudo = addslashes($_POST[`pseudo`]);
203: 	if($_POST[`TheTexte`]!=``) { $TheTexte=addslashes($_POST[`TheTexte`]); } else { $TheTexte=`Aucun`; }
231: 	$pseudo = addslashes($_POST[`pseudo`]); 
260: 	if($_POST[`prenom`]!=``) { $prenom=addslashes($_POST[`prenom`]); } else { $prenom=`Aucun`; }
263: 	if($_POST[`msn`]!=``) { $msn=addslashes($_POST[`msn`]); } else { $msn=`Aucun`; }

In file: modifok.php
In file: 
131: 	if($_POST[`msn`]!=``) { $msn=addslashes($_POST[`msn`]); } else { $msn=`Aucun`; }
208: 	if($_POST[`TheTexte`]!=``) { $TheTexte=addslashes($_POST[`TheTexte`]); } else { $TheTexte=`Aucun`; }

We need to change these lines:

In file: imprt.php
In file: 
26: 	$pseudo = addslashes($_POST[`pseudo`])); 
28: 	$TheTexte = addslashes($_POST[`TheTexte`])); 
92: 	$pseudo = addslashes($_POST[`pseudo`])); 
117: 	if($_POST[`prenom`]!=``) { $prenom=htmlspecialchars(strip_tags($_POST[`prenom`])); } else { $prenom=`Aucun`; }
128: 	if($_POST[`prenom`]!=``) { $prenom=htmlspecialchars(strip_tags($_POST[`prenom`])); } else { $prenom=`Aucun`; }
119: 	if($_POST[`loc`]!=``) { $localisation=htmlspecialchars(strip_tags($_POST[`loc`])); } else { $localisation=`Aucune`; }
120: 	if($_POST[`loisirs`]!=``) { $loisirs=htmlspecialchars(strip_tags($_POST[`loisirs`])); } else { $loisirs=`Aucun`; }
121: 	if($_POST[`emploi`]!=``) { $emploi=htmlspecialchars(strip_tags($_POST[`emploi`])); } else { $emploi=`Aucun`; }
122: 	if($_POST[`citation`]!=``) { $citation=htmlspecialchars(strip_tags($_POST[`citation`])); } else { $citation=`Aucune`; }
123: 	if($_POST[`mail`]!=``) { $mail=htmlspecialchars(strip_tags($_POST[`mail`])); } else { $mail=`Aucune`; }
124: 	if($_POST[`msn`]!=``) { $msn=htmlspecialchars(strip_tags($_POST[`msn`])); } else { $msn=`Aucune`; }
125: 	if($_POST[`yahoo`]!=``) { $yahoo=htmlspecialchars(strip_tags($_POST[`yahoo`])); } else { $yahoo=`Aucune`; }
126: 	if($_POST[`icq`]!=``) { $icq=htmlspecialchars(strip_tags($_POST[`icq`])); } else { $icq=`Aucune`; }
127: 	if($_POST[`aim`]!=``) { $aim=htmlspecialchars(strip_tags($_POST[`aim`])); } else { $aim=`Aucune`; }
129: 	$web=htmlspecialchars(strip_tags($_POST[`web`]));
157: 	$pseudo = htmlspecialchars(strip_tags($_POST[`pseudo`]));
203: 	if($_POST[`TheTexte`]!=``) { $TheTexte=htmlspecialchars(strip_tags($_POST[`TheTexte`])); } else { $TheTexte=`Aucun`; }
231: 	$pseudo = htmlspecialchars(strip_tags($_POST[`pseudo`])); 
260: 	if($_POST[`prenom`]!=``) { $prenom=htmlspecialchars(strip_tags($_POST[`prenom`])); } else { $prenom=`Aucun`; }
263: 	if($_POST[`msn`]!=``) { $msn=htmlspecialchars(strip_tags($_POST[`msn`])); } else { $msn=`Aucun`; }

In file: modifok.php
In file: 
131: 	if($_POST[`msn`]!=``) { $msn=htmlspecialchars(strip_tags($_POST[`msn`])); } else { $msn=`Aucun`; }
208: 	if($_POST[`TheTexte`]!=``) { $TheTexte=htmlspecialchars(strip_tags($_POST[`TheTexte`])); } else { $TheTexte=`Aucun`; }


Security Risk:
==============
1.1
The security risk of the sql injection vulnerabilities are estimated as critical.

1.2
The security risk of the persistent input validation vulnerabilities are estimated as medium(+).


Credits & Authors:
==================
Vulnerability Laboratory [Research Team]  -    snup (snup@vulnerability-lab.com) 
[ http://snup1.blogspot.com ]


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