CVE-2021-32743: Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for report...

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 prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.80%

75.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-202

Affected Software

Vendor	Product	Versions
Icinga	Icinga	>= 2.0.0, < 2.11.10
Icinga	Icinga	>= 2.12.0, < 2.12.5
Debian	Debian Linux	9.0

References

https://github.com/Icinga/icinga2/security/advisories/GHSA-wrpw-pmr8-qgj7Exploit, Third Party Advisory
https://icinga.com/blog/2021/07/15/releasing-icinga-2-12-5-and-2-11-10/Exploit, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00010.htmlMailing List, Third Party Advisory
https://github.com/Icinga/icinga2/security/advisories/GHSA-wrpw-pmr8-qgj7Exploit, Third Party Advisory
https://icinga.com/blog/2021/07/15/releasing-icinga-2-12-5-and-2-11-10/Exploit, Vendor Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00010.htmlMailing List, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/11/msg00010.html

Timeline

Published: Jul 15, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-32743?

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. In versions prior to 2.11.10 and from version 2.12.0 through version 2.12.4, some of the Icinga 2 features that require credentials for external services expose those credentials through the API to authenticated API users with read permissions for the corresponding object types. IdoMysqlConnection and IdoPgsqlConnection (every released version) exposes the password of the user used to connect to the database. IcingaDB (added in 2.12.0) exposes the password used to connect to the Redis server. ElasticsearchWriter (added in 2.8.0)exposes the password used to connect to the Elasticsearch server. An attacker who obtains these credentials can impersonate Icinga to these services and add, modify and delete information there. If credentials with more permissions are in use, this increases the impact accordingly. Starting with the 2.11.10 and 2.12.5 releases, these passwords are no longer exposed via the API. As a workaround, API user permissions can be restricted to not allow querying of any affected objects, either by explicitly listing only the required object types for object query permissions, or by applying a filter rule.

How severe is CVE-2021-32743?

CVE-2021-32743 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.

How do I fix CVE-2021-32743?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.