CVE-2023-44981

Description

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.

How to fix CVE-2023-44981

To remediate CVE-2023-44981, upgrade the affected package to a fixed version below.

—upgrade to 3.7.2 or later
—upgrade to 3.4.13-6+deb11u1 or later
—upgrade to 3.4.13-2+deb10u1 or later
—upgrade to 3.4.13-6+deb11u1 or later
—upgrade to 3.7.2 or later

Is CVE-2023-44981 being exploited?

Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.

Affected packages (5)

from 0, < 3.7.2, >= 3.8.0, < 3.8.3 | >= 3.9.0, <= 3.9.0
from 0, < 3.4.13-6+deb11u1
from 0, < 3.4.13-2+deb10u1
from 0, < 3.4.13-6+deb11u1
from 0, < 3.7.2

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	CRITICAL9.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N