SB2021032501 - MitM attack in Elastic Logstash
Published: March 25, 2021
Security Bulletin ID
SB2021032501
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Certificate Validation (CVE-ID: CVE-2021-22138)
CWE-ID: CWE-295 - Improper Certificate Validation
CVSSv4: 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
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 update from vendor's website.