CVE-2018-8012 Missing Authorization in Apache ZooKeeper
An attacker can join a ZooKeeper cluster without authentication to propagate counterfeit changes, requiring an upgrade to secure the quorum.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-8012?
CVE-2018-8012 is a high-severity missing authorization vulnerability in Debian Debian Linux, published on 21 May 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2018-8012?
4 open source packages ship an affected version, including org.apache.zookeeper:zookeeper. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.zookeeper:zookeeper Maven | All versions | 3.4.10 |
org.apache.zookeeper:zookeeper Maven | All versions | 3.4.10 |
org.apache.zookeeper:zookeeper Maven | From 3.5.0-alpha | 3.5.4-beta |
org.apache.zookeeper:zookeeper Maven | From 3.5.0-alpha | 3.5.4-beta |
Products include Apache Zookeeper, Debian Debian Linux, Oracle Goldengate Stream Analytics.
How do I fix CVE-2018-8012?
Upgrade org.apache.zookeeper:zookeeper to a fixed version for your release line: 3.4.10 or 3.5.4-beta.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2018-8012 being exploited?
There is no known exploitation of CVE-2018-8012 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
- CVE-2024-51504 Apache ZooKeeper: Authentication bypass with IP-based authentication in Admin Server
- CVE-2023-44981 Apache ZooKeeper: Authorization bypass in SASL Quorum Peer Authentication
- CVE-2016-5017 Memory corruption in n/a
- CVE-2026-59739 Apache ZooKeeper: Information disclosure via SetWatches reconnect replay
- CVE-2026-59969 Apache ZooKeeper: Improper validation of certificate with host mismatch in FIPS mode
Sources
Also known as DEBIAN-CVE-2018-8012, DSA-4214-1, GHSA-ccqf-c5hq-77mp, UBUNTU-CVE-2018-8012.