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CVE-2021-37698

Published: 19 August 2021

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
icinga2
Launchpad, Ubuntu, Debian
focal Needs triage

jammy Needs triage

lunar Not vulnerable
(2.13.5-1)
trusty Does not exist

upstream
Released (2.13.1-1)
kinetic Ignored
(end of life, was needs-triage)
bionic Needs triage

hirsute Ignored
(end of life)
impish Ignored
(end of life)
xenial Needs triage

mantic Not vulnerable
(2.13.5-1)

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N