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Privilege escalation in the calendar application

Platform: ownCloud Server

Versions: 4.5.7,

Date: 2/20/2013

Risk level: Medium

Description

Due to not properly checking the ownership of an calendar, an authenticated attacker is able to download calendars of other users via the “calid” GET parameter to export.php in /apps/calendar/

Affected Software

  • ownCloud Server < 4.5.7 (CVE-2013-0304)

Action Taken

It is recommended that all instances are upgraded to ownCloud Server 4.5.8.

Acknowledgements

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

  • Romain Severin – Intrinsec – Vulnerability discovery and disclosure.

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