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AUSCERT External Security Bulletin Redistribution
Apache ZooKeeper Quorum Peer mutual authentication
22 May 2018
AusCERT Security Bulletin Summary
Operating System: UNIX variants (UNIX, Linux, OSX)
Impact/Access: Provide Misleading Information -- Remote/Unauthenticated
CVE Names: CVE-2018-8012
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CVE-2018-8012: Apache ZooKeeper Quorum Peer mutual authentication
The Apache Software Foundation
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
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.
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.
This issue was identified by Foldi Tamas and Eugene Koontz
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