A vulnerability was found in Opencast up to 7.5/8.0. It has been declared as critical. This vulnerability affects some unknown functionality of the component OAI-PMH. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Opencast before 8.1 and 7.6 allows unauthorized public access to all media and metadata by default via OAI-PMH. OAI-PMH is part of the default workflow and is activated by default, requiring active user intervention of users to protect media. This leads to users unknowingly handing out public access to events without their knowledge. The problem has been addressed in Opencast 7.6 and 8.1 where the OAI-PMH endpoint is configured to require users with `ROLE_ADMIN` by default. In addition to this, Opencast 9 removes the OAI-PMH publication from the default workflow, making the publication a conscious decision users have to make by updating their workflows.

The weakness was presented 01/30/2020 (GitHub Repository). The advisory is available at github.com. This vulnerability was named CVE-2020-5228 since 01/02/2020. The attack can be initiated remotely. A single authentication is required for exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available.

Upgrading to version 7.6 or 8.1 eliminates this vulnerability.

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• Opencast

Version

• 7.0
• 7.1
• 7.2
• 7.3
• 7.4
• 7.5
• 8.0

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