Privilege escalation in the contacts application
Platform: ownCloud Server
Versions: 4.5.10, 5.0.5,
Date: 4/19/2013
Risk level: Medium
Description
Due to not properly checking the ownership of a single contact, an authenticated attacker is able to download contacts of other users in all ownCloud versions prior to 5.0.5 including the 4.5.x branch.
Note: Successful exploitation of this privilege escalation requires the “contacts” app to be enabled (enabled by default).
Affected Software
- ownCloud Server < 5.0.5 (CVE-2013-1963)
- ownCloud Server < 4.5.10 (CVE-2013-1963)
Action Taken
It is recommended that all instances are upgraded to ownCloud Server 5.0.5 or 4.5.10.
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.