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Vigil@nce - Oracle VM VirtualBox: escape to host file system via shared folders

June 2017 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker in a gest system can attempts many parallel access to shared folders in Oracle VM VirtualBox, in order to get access to the whole Linux host filesystem.

Impacted products: openSUSE Leap, VirtualBox.

Severity: 2/4.

Creation date: 18/04/2017.

DESCRIPTION OF THE VULNERABILITY

The Oracle VM VirtualBox product allows to share folders between the host and guest systems.

However, in the case of a Linux host, an error in the synchronization of guest access to shared folders allows the guest system to open a file the real location of which is not in the configured shared subtree.

An attacker in a gest system can therefore attempts many parallel access to shared folders in Oracle VM VirtualBox, in order to get access to the whole Linux host filesystem.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/...




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