#VU51713 Improper Certificate Validation in Logstash - CVE-2021-22138

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Main Vulnerability Database Vulnerabilities #VU51713

#VU51713 Improper Certificate Validation in Logstash - CVE-2021-22138

Published: March 25, 2021


Vulnerability identifier: #VU51713
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-22138
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Logstash
Software vendor:
Elastic Stack

Description

The vulnerability allows a remote attacker to perform MitM attack.

The vulnerability exists due to improper TLS certificate validation in the monitoring feature of Logstash. When specifying a trusted server CA certificate Logstash does not properly verify the certificate returned by the monitoring server. A remote attacker can preform a Man-in-the-Middle attack.


Remediation

Install updates from vendor's website.

External links