CVE-2021-37698: Missing TLS service certificate validation in GelfWriter, ElasticsearchWriter, InfluxdbWriter and Influxdb2Writer
First published: Thu Aug 19 2021(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Icinga Icinga | >=2.5.0<2.11.10 | |
| Icinga Icinga | >=2.12.0<2.12.6 | |
| Icinga Icinga | >=2.13.0<2.13.1 | |
| Debian Debian Linux | =9.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://github.com/Icinga/icinga2/releases/tag/v2.11.11
- https://github.com/Icinga/icinga2/releases/tag/v2.12.6
- https://github.com/Icinga/icinga2/releases/tag/v2.13.1
- https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2
- https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html
Frequently Asked Questions
What is CVE-2021-37698?
CVE-2021-37698 is a vulnerability in Icinga, a monitoring system, which allows an attacker to bypass certificate verification.
How does CVE-2021-37698 affect Icinga?
CVE-2021-37698 affects Icinga versions 2.5.0 through 2.13.0 and allows an attacker to exploit insecure certificate verification.
What is the severity of CVE-2021-37698?
CVE-2021-37698 has a severity score of 7.5, which is considered high.
Which software versions are affected by CVE-2021-37698?
CVE-2021-37698 affects Icinga versions 2.5.0 through 2.13.0 as well as Debian Linux version 9.0.
How can I fix CVE-2021-37698?
To fix CVE-2021-37698, update to Icinga version 2.11.11, 2.12.6, or 2.13.1, or update Debian Linux to a version that is not affected.
- collector/nvd-index
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/author
- agent/references
- agent/severity
- agent/title
- agent/weakness
- agent/softwarecombine
- agent/tags
- agent/first-publish-date
- agent/event
- agent/description
- vendor/icinga
- canonical/icinga icinga
- version/icinga icinga/2.5.0
- version/icinga icinga/2.12.0
- version/icinga icinga/2.13.0
- vendor/debian
- canonical/debian debian linux
- version/debian debian linux/9.0