Authorization Bypass Through User-Controlled Key Affecting zookeeper package, versions <3.4.13-2+deb10u1


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.45% (75th percentile)

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  • Snyk IDSNYK-DEBIAN10-ZOOKEEPER-5960908
  • published12 Oct 2023
  • disclosed11 Oct 2023

Introduced: 11 Oct 2023

CVE-2023-44981  (opens in a new tab)
CWE-639  (opens in a new tab)

How to fix?

Upgrade Debian:10 zookeeper to version 3.4.13-2+deb10u1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream zookeeper package and not the zookeeper package as distributed by Debian. See How to fix? for Debian:10 relevant fixed versions and status.

Authorization Bypass Through User-Controlled Key vulnerability in Apache ZooKeeper. If SASL Quorum Peer authentication is enabled in ZooKeeper (quorum.auth.enableSasl=true), the authorization is done by verifying that the instance part in SASL authentication ID is listed in zoo.cfg server list. The instance part in SASL auth ID is optional and if it's missing, like 'eve@EXAMPLE.COM', the authorization check will be skipped. As a result an arbitrary endpoint could join the cluster and begin propagating counterfeit changes to the leader, essentially giving it complete read-write access to the data tree. Quorum Peer authentication is not enabled by default.

Users are recommended to upgrade to version 3.9.1, 3.8.3, 3.7.2, which fixes the issue.

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.

CVSS Scores

version 3.1