Vigil@nce - Oracle VM VirtualBox: escape to host file system via shared folders
June 2017 by Vigil@nce
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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.
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.
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