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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.42%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.42% probability · 71th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-295
- Affected
- icinga/icinga · debian/debian linux
- Source
- security-advisories@github.com
References
- https://github.com/Icinga/icinga2/releases/tag/v2.11.11Release Notes, Third Party Advisory
- https://github.com/Icinga/icinga2/releases/tag/v2.12.6Release Notes, Third Party Advisory
- https://github.com/Icinga/icinga2/releases/tag/v2.13.1Release Notes, Third Party Advisory
- https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/11/msg00010.htmlMailing List, Third Party Advisory
- https://github.com/Icinga/icinga2/releases/tag/v2.11.11Release Notes, Third Party Advisory
- https://github.com/Icinga/icinga2/releases/tag/v2.12.6Release Notes, Third Party Advisory
- https://github.com/Icinga/icinga2/releases/tag/v2.13.1Release Notes, Third Party Advisory
- https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2Third Party 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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.