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CVE-2018-8012

28
FAUCET Score

CVE-2018-8012 describes a critical authentication bypass vulnerability in Apache ZooKeeper versions prior to 3.4.10 and 3.5.0-alpha through 3.5.3-beta, allowing an unauthenticated attacker to join a ZooKeeper quorum. This flaw enables the attacker to propagate counterfeit changes to the leader, potentially compromising data integrity within the cluster. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, leading to high integrity impacts. While no public exploit code, Metasploit modules, or active exploitation have been identified, and community discussion is minimal, the potential for unauthorized data manipulation makes this a significant concern for affected systems.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.4.10CPE matchmatch criteria
cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:*
>= 3.5.0, <= 3.5.3CPE matchmatch criteria
cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:*
3.5.0CPE matchmatch criteria
cpe:2.3:a:apache:zookeeper:3.5.0:alpha:*:*:*:*:*:*
3.5.3CPE matchmatch criteria
cpe:2.3:a:apache:zookeeper:3.5.3:beta:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
8.72%
Probability of exploitation in next 30 days
EPSS Percentile
94.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0872 is in the 91st percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

mavenpatch availablevia ghsa
Product: org.apache.zookeeper:zookeeperFixed in: 3.4.10
mavenpatch availablevia ghsa
Product: org.apache.zookeeper:zookeeperFixed in: 3.5.4-beta
oraclepatch availablevia nvd_reference
View patch
redhatend of lifevia redhat_api
Product: Red Hat JBoss A-MQ 6Fixed in: zookeeper
redhatend of lifevia redhat_api
Product: Red Hat JBoss Fuse 6Fixed in: zookeeper

Vendor Advisories (2)

mavenGHSA-ccqf-c5hq-77mphigh

Missing Authorization in Apache ZooKeeper

May 13, 2022
redhatCVE-2018-8012Important

zookeeper: No authentication or authorization is enforced when a server joins a quorum

May 22, 2018

References

lists.apache.org / thread.html/053d9ce4d579b02203db18545fee5e33f35f2932885459b74d1e4272%40%3Cissues.activemq.apache.org%3E
lists.apache.org / thread.html/bcce5a9c532b386c68dab2f6b3ce8b0cc9b950ec551766e76391caa3%40%3Ccommits.nifi.apache.org%3E
lists.apache.org / thread.html/c75147028c1c79bdebd4f8fa5db2b77da85de2b05ecc0d54d708b393%40%3Cdev.zookeeper.apache.org%3E
lists.apache.org / thread.html/r73daf1fc5d85677d9a854707e1908d14e174b7bbb0c603709c0ab33f%40%3Coak-commits.jackrabbit.apache.org%3E
lists.apache.org / thread.html/r8f0d920805af93033c488af89104e2d682662bacfb8406db865d5e14%40%3Cdev.jackrabbit.apache.org%3E
lists.apache.org / thread.html/rc5bc4ddb0deabf8cfb69378cecee56fcdc76929bea9e6373cb863870%40%3Cdev.jackrabbit.apache.org%3E
lists.apache.org / thread.html/rca37935d661f4689cb4119f1b3b224413b22be161b678e6e6ce0c69b%40%3Ccommits.nifi.apache.org%3E
lists.apache.org / thread.html/re3a4048e9515d4afea416df907a612ed384a16c57cf99e97ee4a12f2%40%3Cdev.jackrabbit.apache.org%3E
debian.org / security/2018/dsa-4214
Third Party Advisory
oracle.com / security-alerts/cpujul2020.html
PatchThird Party Advisory
securityfocus.com / bid/104253
Third Party AdvisoryVDB Entry
securitytracker.com / id/1040948
Third Party AdvisoryVDB Entry