ownCloud server 9.1.3User enumeration with error messages
Information disclosure in email field dialog at sharing
Flooding logfiles with a 1 Bit BMP File
ownCloud desktop 2.2.3Local Code Injection
ownCloud mobile iOS 3.4.4Improper validation of certificates within the iOS application
Credentials potentially leaked to other configured ownCloud instance
Privilege escalation in the contacts application (oC-SA-2013-018)
19th April 2013
Risk level: Medium
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).
- ownCloud Server < 5.0.5 (CVE-2013-1963)
- ownCloud Server < 4.5.10 (CVE-2013-1963)
It is recommended that all instances are upgraded to ownCloud Server 5.0.5 or 4.5.10.
The ownCloud team thanks the following people for their research and responsible disclosure of the above advisory:
- Lukas Reschke - ownCloud Inc. (firstname.lastname@example.org) - Vulnerability discovery and disclosure.