An issue is present in Apache ZooKeeper 1.0.0 to 3.4.13 and 3.5.0-alpha to 3.5.4-beta. ZooKeeper’s getACL() command doesn’t check any permission when retrieves the ACLs of the requested node and returns all information contained in the ACL Id field as plaintext string. DigestAuthenticationProvider overloads the Id field with the hash value that is used for user authentication. As a consequence, if Digest Authentication is in use, the unsalted hash value will be disclosed by getACL() request for unauthenticated or unprivileged users.

An update of the zookeeper package has been released.

The remote Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 / 23.10 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6559-1 advisory.

    It was discovered that ZooKeeper incorrectly handled authorization for the getACL() command. A remote     attacker could possibly use this issue to obtain sensitive information. This issue only affected Ubuntu     14.04 LTS and Ubuntu 16.04 LTS. (CVE-2019-0201)

    Damien Diederen discovered that ZooKeeper incorrectly handled authorization if SASL Quorum Peer     authentication is enabled. An attacker could possibly use this issue to bypass ZooKeeper's authorization     system. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 23.04 and     Ubuntu 23.10. (CVE-2023-44981)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Harrison Neil discovered that the getACL() command in Zookeeper, a service for maintaining configuration information, did not validate permissions, which could result in information disclosure.

The version of Apache ZooKeeper listening on the remote host is prior to 3.4.14 or 3.5.x prior to 3.5.5. It is, therefore, affected by an information disclosure vulnerability in ZooKeeper's getACL() command as a result of not checking requester permissions. An unauthenticated, remote attacker can exploit this to disclose potentially sensitive information.

It was discovered that there was an information disclosure vulnerability in zookeeper, a distributed co-ordination server. Users who were not authorised to read data were able to view the access control list.

For Debian 8 'Jessie', this issue has been fixed in zookeeper version 3.4.9-3+deb8u2.

We recommend that you upgrade your zookeeper packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
202888	Photon OS 2.0: Zookeeper PHSA-2019-2.0-0161	Nessus	PhotonOS Local Security Checks	medium
202814	Photon OS 3.0: Zookeeper PHSA-2019-3.0-0017	Nessus	PhotonOS Local Security Checks	medium
189088	Ubuntu 16.04 ESM / 18.04 ESM / 20.04 LTS / 22.04 LTS / 23.04 / 23.10 : ZooKeeper vulnerabilities (USN-6559-1)	Nessus	Ubuntu Local Security Checks	critical
126205	Photon OS 1.0: Zookeeper PHSA-2019-1.0-0237	Nessus	PhotonOS Local Security Checks	medium
125859	Debian DSA-4461-1 : zookeeper - security update	Nessus	Debian Local Security Checks	medium
125635	Apache ZooKeeper < 3.4.14 / 3.5.x < 3.5.5 Information Disclosure	Nessus	Misc.	medium
125407	Debian DLA-1801-1 : zookeeper security update	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2019-0201

medium

Tenable Plugins

medium

medium

critical

medium

medium

medium

medium