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Local Code Injection (oC-SA-2016-016)

17th August 2016

Risk level: Medium

CVSS v2 Base Score: 4.1 (AV:L/AC:M/Au:S/C:C/I:P/A:N/E:F/RL:OF/RC:C)

CWE: Process Control (CWE-114)

Description

The ownCloud Client was vunerable to a local code injection attack. A malicious local user could create a special path where the client would load libraries from during startup. As on Windows, everyone by default has the permission to write to the C: drive and create arbitrary directories and subdirectories, this attack is practically feasible in any non-hardened Windows environment. This could lead to injecting code into other users' ownCloud Client.

Affected Software

  • ownCloud Desktop < 2.2.3 (CVE-2016-7102)

Action Taken

To protect our users ownCloud has issued the 2.2.3 client which no longer loads code from this location.

Acknowledgements

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

  • Florian Bogner - Vulnerability discovery and disclosure.