2.13. CVE-2020-1955: Apache CouchDB Remote Privilege Escalation¶
The Apache Software Foundation
CouchDB version 3.0.0 shipped with a new configuration setting that governs access control to the entire database server called require_valid_user_except_for_up. It was meant as an extension to the long-standing setting require_valid_user, which in turn requires that any and all requests to CouchDB will have to be made with valid credentials, effectively forbidding any anonymous requests.
The new require_valid_user_except_for_up is an off-by-default setting that was meant to allow requiring valid credentials for all endpoints except for the /_up endpoint.
However, the implementation of this made an error that lead to not enforcing credentials on any endpoint, when enabled.
Users who have not enabled require_valid_user_except_for_up are not affected.
This issue was discovered by Stefan Klein.