#VU12913 Improper authentication in ZooKeeper - CVE-2018-8012

Vulnerability identifier: #VU12913

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-8012

CWE-ID: CWE-287

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ZooKeeper
Server applications / Database software

Vendor: Apache Foundation

Description
The vulnerability allows a remote attacker to bypass authentication and write arbitrary files on the target system.

The weakness exists due to missing authentication to join a quorum. A remote attacker can bypass authentication, join the cluster and propagate changes to the cluster leader.

Mitigation
Update to version 3.4.10 or 3.5.4-beta.

Vulnerable software versions

ZooKeeper: 3.4.8 - 3.5.3 beta

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External links
https://zookeeper.apache.org/security.html#CVE-2018-8012

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.