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Improper authorization checks in contacts

Platform: ownCloud Server

Versions: 6.0.3,

Date: 5/24/2014

Risk level: Medium

Description

Due to not verifying whether an user has been granted access to an address book, authenticated users are able to access arbitrary contacts of other users.

Affected Software

  • ownCloud Server < 6.0.3 (CVE-2014-3834)

Action Taken

We reviewed the access-control of the contacts application and ensured that permissions are checked properly for every action.

Acknowledgements

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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