Missing TLS service certificate validation in GelfWriter, ElasticsearchWriter, InfluxdbWriter and Influxdb2Writer
CVE-2021-37698

7.5HIGH

Key Information:

Vendor

Icinga

Status
Icinga2
Vendor
CVE Published:
19 August 2021

What is CVE-2021-37698?

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.

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Affected Version(s)

icinga2 >= 2.5.0, <= 2.13.0

References

https://github.com/Icinga/icinga2/security/advisories/GHS...
x_refsource_CONFIRM
https://github.com/Icinga/icinga2/releases/tag/v2.11.11
x_refsource_MISC
https://github.com/Icinga/icinga2/releases/tag/v2.12.6
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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