CVE-2017-1000221 Explained : Impact and Mitigation

Opencast version 2.2.3 and older have a vulnerability where user names overlap, leading to incorrect access control by the Opencast search service.

Understanding CVE-2017-1000221

If there is an overlap in user names in Opencast version 2.2.3 and older, it will result in incorrect access control handling by the Opencast search service.

What is CVE-2017-1000221?

Users with similar but slightly different usernames can access recordings intended for specific users.
For example, a user with the role ROLE_USER can access recordings meant for ROLE_USER_X.

The Impact of CVE-2017-1000221

Unauthorized users can access recordings not meant for them, compromising data security.

Technical Details of CVE-2017-1000221

Opencast version 2.2.3 and older are affected by this vulnerability.

Vulnerability Description

Incorrect access control due to overlapping user names.

Affected Systems and Versions

Opencast version 2.2.3 and older.

Exploitation Mechanism

Users with similar usernames can access recordings intended for others.

Mitigation and Prevention

Immediate Steps to Take

Upgrade Opencast to a version where the vulnerability is patched.
Regularly review and update user access controls.

Long-Term Security Practices

Implement unique user names to avoid overlaps.
Conduct regular security audits to identify access control issues.

Patching and Updates

Apply patches and updates provided by Opencast to fix the vulnerability.