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Users can mount the local filesystem

Platform: ownCloud Server

Versions: 5.0.15, 6.0.2,

Date: 7/3/2014

Risk level: High


Due to not properly sanitzing the mount configuration authenticated users are able to mount the local filesystem into their ownCloud. A successful exploit requires the files_external app to be enabled.

Affected Software

  • ownCloud Server < 6.0.2 ()
  • ownCloud Server < 5.0.15 ()

Action Taken

It is recommended that all instances are upgraded to ownCloud Server 6.0.2 or 5.0.15.


The ownCloud team thanks the following people for their research and responsible disclosure of the above advisory:

  • Lukas Reschke – ownCloud Inc. (lukas@owncloud.org) – Vulnerability discovery and disclosure.

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