CVE-2018-8012: Apache ZooKeeper Quorum Peer mutual authentication Severity: Critical
Vendor: The Apache Software Foundation Versions Affected: ZooKeeper prior to 3.4.10 ZooKeeper 3.5.0-alpha through 3.5.3-beta The unsupported ZooKeeper 1.x through 3.3.x versions may be also affected Description: No authentication/authorization is enforced when a server attempts to join a quorum. As a result an arbitrary end point could join the cluster and begin propagating counterfeit changes to the leader. Mitigation: Upgrade to 3.4.10 or later (3.5.4-beta or later if on the 3.5 branch) and enable Quorum Peer mutual authentication. Alternately ensure the ensemble election/quorum communication is protected by a firewall as this will mitigate the issue. See the documentation for more details on correct cluster administration. Credit: This issue was identified by Földi Tamás and Eugene Koontz References: https://issues.apache.org/jira/browse/ZOOKEEPER-1045 https://cwiki.apache.org/confluence/display/ZOOKEEPER/Server-Server+mutual+authentication http://zookeeper.apache.org/doc/current/zookeeperAdmin.html
