CVE-2021-37698

Missing TLS service certificate validation in GelfWriter, ElasticsearchWriter, InfluxdbWriter and Influxdb2Writer

Description

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions 2.5.0 through 2.13.0, ElasticsearchWriter, GelfWriter, InfluxdbWriter and Influxdb2Writer do not verify the server's certificate despite a certificate authority being specified. Icinga 2 instances which connect to any of the mentioned time series databases (TSDBs) using TLS over a spoofable infrastructure should immediately upgrade to version 2.13.1, 2.12.6, or 2.11.11 to patch the issue. Such instances should also change the credentials (if any) used by the TSDB writer feature to authenticate against the TSDB. There are no workarounds aside from upgrading.

Category

7.5
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.13%
Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory github.com Third-Party Advisory debian.org
Affected: Icinga icinga2
Published at:
Updated at:

References

Link Tags
https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2 third party advisory
https://github.com/Icinga/icinga2/releases/tag/v2.11.11 third party advisory release notes
https://github.com/Icinga/icinga2/releases/tag/v2.12.6 third party advisory release notes
https://github.com/Icinga/icinga2/releases/tag/v2.13.1 third party advisory release notes
https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2021-37698?
CVE-2021-37698 has been scored as a high severity vulnerability.
How to fix CVE-2021-37698?
To fix CVE-2021-37698, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-37698 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-37698 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-37698?
CVE-2021-37698 affects Icinga icinga2.
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