Access Control Bypass Affecting org.apache.zookeeper:zookeeper Open this link in a new tab package, versions [,3.4.14) [3.5.0-alpha, 3.5.5)

  • Exploit Maturity

    Proof of concept

  • Attack Complexity


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  • snyk-id


  • published

    23 May 2019

  • disclosed

    23 May 2019

  • credit

    Harrison Neal

How to fix?

Upgrade org.apache.zookeeper:zookeeper to version 3.4.14, 3.5.5 or higher.


org.apache.zookeeper:zookeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.

Affected versions of this package are vulnerable to Access Control Bypass. ZooKeeper’s getACL() method doesn’t check any permission when retrieving the ACLs of the requested node and returns all information contained in the ACL Id field as plain text string. If Digest Authentication is in use, the unsalted hash value will be disclosed by the getACL() method for unauthenticated or unprivileged users.