CVE-2021-37698 Missing TLS service certificate validation in GelfWriter, ElasticsearchWriter, InfluxdbWriter and Influxdb2Writer

2021-08-1913:55:10

CWE-295

GitHub_M

www.cve.org

icinga 2

tls

certificate validation

cve-2021-37698

elasticsearch

gelf

influxdb

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

AI Score

Confidence

High

EPSS

0.003

Percentile

71.5%

JSON

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.

CNA Affected

[
  {
    "product": "icinga2",
    "vendor": "Icinga",
    "versions": [
      {
        "status": "affected",
        "version": ">= 2.5.0, <= 2.13.0"
      }
    ]
  }
]