CVE-2021-37698 : Icinga is a monitoring system which checks the availability of network resources

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.

Published 2021-08-19 16:15:12

Updated 2021-12-03 02:31:57

Source GitHub, Inc.

View at NVD, CVE.org

Products affected by CVE-2021-37698

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Icinga » Icinga
Versions from including (>=) 2.13.0 and before (<) 2.13.1
cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*
Matching versions
Icinga » Icinga
Versions from including (>=) 2.12.0 and before (<) 2.12.6
cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*
Matching versions
Icinga » Icinga
Versions from including (>=) 2.5.0 and before (<) 2.11.10
cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2021-37698

Top countries where our scanners detected CVE-2021-37698

Top open port discovered on systems with this issue 80

IPs affected by CVE-2021-37698 14

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2021-37698!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-37698

EPSS FAQ

0.13%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 34 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-37698

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:P/I:N/A:N	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: None Availability Impact: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	3.9	3.6	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2021-37698

CWE-295 Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.
Assigned by:
- nvd@nist.gov (Primary)
- security-advisories@github.com (Secondary)

References for CVE-2021-37698

https://github.com/Icinga/icinga2/releases/tag/v2.12.6

Release Icinga v2.12.6 · Icinga/icinga2 · GitHub
Release Notes;Third Party Advisory
https://github.com/Icinga/icinga2/releases/tag/v2.11.11

Release Icinga v2.11.11 · Icinga/icinga2 · GitHub
Release Notes;Third Party Advisory
https://github.com/Icinga/icinga2/releases/tag/v2.13.1

Release Icinga v2.13.1 · Icinga/icinga2 · GitHub
Release Notes;Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html

[SECURITY] [DLA 2816-1] icinga2 security update
Mailing List;Third Party Advisory

CVEs referencing this url
https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2

Missing TLS server certificate validation in ElasticsearchWriter, GelfWriter, InfluxdbWriter and Influxdb2Writer · Advisory · Icinga/icinga2 · GitHub
Third Party Advisory