USBWall

De l’utilité d’un pare-feu pour périphériques de stockage de masse USB sous Linux

A l’heure actuelle, une entreprise sur trois est infectée par des virus informatiques. Les virus se transmettent ensuite entre collègues par mail et par clé USB. En effet, il est possible d’exécuter un programme contenu dans un périphérique directement après l’avoir inséré dans un PC. Lorsqu’une personne connecte ce périphérique USB sur son ordinateur, le virus contenu se lance via l’ordinateur. Les dommages causés sont alors matériels mais aussi économiques. Cependant, les attaques liées aux clés USB sont de plus en plus répandues. Rares sont les solutions prenant en charge ce type d’attaque. Elles sont même inexistantes sous Linux.

Ce projet de fin d’études, développé en partenariat avec le laboratoire LACSC de l’ECE Paris, est destiné à créer un système de sécurité USB Wall. L’essence même de cette étude est de réaliser et d’obtenir un outil entièrement open-source consistant à protéger un parc informatique sous Linux des attaques provenant de périphériques de stockage de masse USB.

Le pare-feu contrôle l’accès des divers périphériques USB et autorise ou non leur utilisation sur les ordinateurs. Le système fonctionne avec une liste blanche qui contient les identifiants des clés USB avec leur niveau d’autorisation d’accès. Cette liste est gérée et définie par un administrateur réseaux via une interface. Tout périphérique dont les identifiants ne sont pas reconnus par le service informatique se voit ainsi interdire l’accès.

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