SB2021081932 - Improper Certificate Validation in Icinga

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Certificate Validation (CVE-ID: CVE-2021-37698)

CWE-ID: CWE-295 - Improper Certificate Validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to intercept sensitive information.

The vulnerability exists due to improper certificate validation in ElasticsearchWriter, GelfWriter, InfluxdbWriter, and Influxdb2Writer when establishing TLS connections to configured TSDB servers. A remote attacker can present a spoofed certificate to intercept sensitive information.

Exploitation requires a spoofable network infrastructure between the affected instance and the target TSDB service.

Remediation

Install update from vendor's website.

References

• https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2
• https://icinga.com/blog/2021/08/19/icinga-2-13-1-security-release/