Home/CVE/Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generat
CVE

CVE-2021-37698

Icinga is a monitoring system which checks the availability of network resources, notifies users of outages, and generat

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.

HIGH · CVSS 7.5 EPSS 0.00157
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-295Improper Certificate Validation
CWE-295Improper Certificate Validation
▤

Affected Products & Versions

4
icinga>= 2.5.0 and < 2.11.10
icinga>= 2.12.0 and < 2.12.6
icinga>= 2.13.0 and < 2.13.1
debian linuxall versions
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · security-advisories@github.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD19 Aug 2021 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
⚑

Vendor Advisories

2
suse-csafopenSUSE-SU-2024:10856-1
suse-csafSUSE-SU-2022:3725-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/Icinga/icinga2/releases/tag/v2.11.11Release NotesThird Party Advisory
https://github.com/Icinga/icinga2/releases/tag/v2.12.6Release NotesThird Party Advisory
https://github.com/Icinga/icinga2/releases/tag/v2.13.1Release NotesThird 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 ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/11/msg00010.html
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