CVE catalog

CVE-2021-37698

icinga2: CVE-2021-37698

Severity: Medium · CVSS 6.8CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Published: Aug 19, 2021, 4:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 1.38% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	icinga2	sid	`2.16.5-1`	fixed
Debian	icinga2	forky	`2.16.5-1`	fixed
Debian	icinga2	trixie	`2.14.6-1`	fixed
Debian	icinga2	trixie-security	`2.14.6-1+deb13u1`	fixed
Debian	icinga2	bookworm	`2.13.6-2+deb12u2`	fixed
Ubuntu	icinga2	16.04	`2.3.8-1build1`	vulnerable
Ubuntu	icinga2	16.04	`2.3.11-1`	vulnerable
Ubuntu	icinga2	16.04	`2.4.0-1`	vulnerable
Ubuntu	icinga2	16.04	`2.4.1-1`	vulnerable
Ubuntu	icinga2	16.04	`2.4.1-2`	vulnerable
Ubuntu	icinga2	16.04	`2.4.1-2ubuntu1`	vulnerable
Ubuntu	icinga2	18.04	`2.7.0-1`	vulnerable
Ubuntu	icinga2	18.04	`2.8.1-0ubuntu2`	vulnerable
Ubuntu	icinga2	20.04	`2.10.5-1build1`	vulnerable
Ubuntu	icinga2	20.04	`2.11.2-1`	vulnerable
Ubuntu	icinga2	20.04	`2.11.2-1ubuntu1`	vulnerable
Ubuntu	icinga2	20.04	`2.11.2-1ubuntu2`	vulnerable
Ubuntu	icinga2	20.04	`2.11.2-1ubuntu3`	vulnerable
Ubuntu	icinga2	22.04	`2.12.3-1`	vulnerable
Ubuntu	icinga2	22.04	`2.13.1-1`	vulnerable
Ubuntu	icinga2	22.04	`2.13.2-1`	vulnerable
Ubuntu	icinga2	22.04	`2.13.2-1build1`	vulnerable
Ubuntu	icinga2	22.04	`2.13.2-1build2`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	icinga2	source	sid	`2.13.1-1`	not yet assigned	Not reported	Not reported
Debian	icinga2	source	forky	`2.13.1-1`	not yet assigned	Not reported	Not reported
Debian	icinga2	source	trixie	`2.13.1-1`	not yet assigned	Not reported	Not reported
Debian	icinga2	source	bookworm	`2.13.1-1`	not yet assigned	Not reported	Not reported

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[icinga2]Unknown
Details (2)
- 2.13.6-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- 2.13.6-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
[icinga2-bin]Unknown
Source package: [icinga2]
Details (2)
- 2.13.6-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- 2.13.6-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
[icinga2-common]Unknown
Source package: [icinga2]
Details (2)
- 2.13.6-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- 2.13.6-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
[icinga2-doc]Unknown
Source package: [icinga2]
Details (2)
- 2.13.6-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- 2.13.6-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
[icinga2-ido-mysql]Unknown
Source package: [icinga2]
Details (2)
- 2.13.6-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- 2.13.6-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
[icinga2-ido-pgsql]Unknown
Source package: [icinga2]
Details (2)
- 2.13.6-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- 2.13.6-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
[vim-icinga2]Unknown
Source package: [icinga2]
Details (2)
- 2.13.6-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12
- 2.13.6-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · bookworm; dsa · icinga2 · debian · 12

[Debian 13 (Trixie)]

[icinga2]Unknown
Details (4)
- 2.14.6-1 · amd64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1 · arm64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
[icinga2-bin]Unknown
Source package: [icinga2]
Details (4)
- 2.14.6-1 · amd64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1 · arm64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
[icinga2-common]Unknown
Source package: [icinga2]
Details (4)
- 2.14.6-1 · all · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1 · all · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
[icinga2-doc]Unknown
Source package: [icinga2]
Details (4)
- 2.14.6-1 · all · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1 · all · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
[icinga2-ido-mysql]Unknown
Source package: [icinga2]
Details (4)
- 2.14.6-1 · amd64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1 · arm64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
[icinga2-ido-pgsql]Unknown
Source package: [icinga2]
Details (4)
- 2.14.6-1 · amd64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1 · arm64 · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
[vim-icinga2]Unknown
Source package: [icinga2]
Details (4)
- 2.14.6-1 · all · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1 · all · trixie
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13
- 2.14.6-1+deb13u1 · all · trixie-security
  Fixed · Fixed: 2.13.1-1
  dsa · icinga2 · debian · 13

Observed: Oct 23, 2026, 6:01:15 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]