CVE-2024-25619

Summary

CVE-2024-25619 is a vulnerability affecting Mastodon, an open-source social network server. When an OAuth Application is destroyed, the streaming server fails to receive notification that associated Access Tokens have been terminated. This oversight could potentially allow a malicious application to continue streaming data even after it has been destroyed. The issue stems from Doorkeeper's use of `dependent: delete_all` configuration, which doesn't trigger ActiveRecord callbacks. To mitigate the risk, a `before_destroy` callback should be added to `ApplicationExtension` to inform the streaming server of impending Access Token termination. Users are advised to upgrade to versions 4.2.6, 4.1.14, 4.0.14, or 3.5.18 to address the vulnerability. No known workarounds exist. Impact should be minimal as the affected application must be owned by the user.

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