CVE & CISA-KEV Catalog

CVE-2018-8012

HIGHEPSS 95th pctl

7.5

CVSS v3

Description

No authentication/authorization is enforced when a server attempts to join a quorum in Apache ZooKeeper before 3.4.10, and 3.5.0-alpha through 3.5.3-beta. As a result an arbitrary end point could join the cluster and begin propagating counterfeit changes to the leader.

CWE-862Missing Authorization

How to fix

Remediation Available

zookeeperDebian

Fixed in:3.4.10-2CVE-2018-8012

Fixed in:3.4.10-2CVE-2018-8012

Fixed in:3.4.10-2CVE-2018-8012

libzookeeper-javaUbuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

libzookeeper-mt2Ubuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

libzookeeper-st2Ubuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

libzookeeper2Ubuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

python-zookeeperUbuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

zookeeperUbuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

zookeeper-binUbuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

zookeeperdUbuntu

Fixed in:3.4.5+dfsg-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2019-04-02.

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4789-1

This Ubuntu release reached end-of-life on 2021-04-02.

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

8.47%probability of exploitation in 30 days

95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

Patch1

oracle.com

Third-Party Advisory3

Other references8

Related Vulnerabilities

Other CWE-862 (Missing Authorization) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2021-39226	Critical	9.8	100%	KEV	Fix
CVE-2022-0543	Critical	10.0	99%	KEV	Fix
CVE-2021-21978	Critical	9.8	99%	-	Fix
CVE-2023-52163	High	8.8	97%	KEV	-
CVE-2022-1329	High	8.8	93%	-	-
CVE-2023-6875	Critical	9.8	90%	-	-

Common questions

How do I fix CVE-2018-8012?

Published advisories record a fix for 9 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-8012 being actively exploited?

Not that we know of. CVE-2018-8012 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 8.5% is the estimated probability that it will be exploited in the next 30 days. That is higher than 95% of all scored CVEs.

How severe is CVE-2018-8012?

CVE-2018-8012 has a CVSS v3 base score of 7.5, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-8012 affect?

Published advisories record a fix for zookeeper (Debian), libzookeeper-java (Ubuntu), libzookeeper-mt2 (Ubuntu), libzookeeper-st2 (Ubuntu), and 5 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.