ubuntu-cve-2021-37698
Vulnerability from osv_ubuntu
Published
2021-08-19 16:15
Modified
2025-10-24 04:50
Summary
Details

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.

Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
N/A (UNKNOWN)
medium
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "icinga2",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "icinga2-bin",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "icinga2-classicui",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "icinga2-common",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "icinga2-studio",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "libicinga2",
            "binary_version": "2.4.1-2ubuntu1"
          },
          {
            "binary_name": "vim-icinga2",
            "binary_version": "2.4.1-2ubuntu1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "icinga2",
        "purl": "pkg:deb/ubuntu/icinga2@2.4.1-2ubuntu1?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.8-1build1",
        "2.3.11-1",
        "2.4.0-1",
        "2.4.1-1",
        "2.4.1-2",
        "2.4.1-2ubuntu1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "icinga2",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "icinga2-bin",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "icinga2-classicui",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "icinga2-common",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "icinga2-studio",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "libicinga2",
            "binary_version": "2.8.1-0ubuntu2"
          },
          {
            "binary_name": "vim-icinga2",
            "binary_version": "2.8.1-0ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "icinga2",
        "purl": "pkg:deb/ubuntu/icinga2@2.8.1-0ubuntu2?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.7.0-1",
        "2.8.1-0ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "icinga2",
            "binary_version": "2.11.2-1ubuntu3"
          },
          {
            "binary_name": "icinga2-bin",
            "binary_version": "2.11.2-1ubuntu3"
          },
          {
            "binary_name": "icinga2-common",
            "binary_version": "2.11.2-1ubuntu3"
          },
          {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.11.2-1ubuntu3"
          },
          {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.11.2-1ubuntu3"
          },
          {
            "binary_name": "vim-icinga2",
            "binary_version": "2.11.2-1ubuntu3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:20.04:LTS",
        "name": "icinga2",
        "purl": "pkg:deb/ubuntu/icinga2@2.11.2-1ubuntu3?arch=source\u0026distro=focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.10.5-1build1",
        "2.11.2-1",
        "2.11.2-1ubuntu1",
        "2.11.2-1ubuntu2",
        "2.11.2-1ubuntu3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "icinga2",
            "binary_version": "2.13.2-1build2"
          },
          {
            "binary_name": "icinga2-bin",
            "binary_version": "2.13.2-1build2"
          },
          {
            "binary_name": "icinga2-common",
            "binary_version": "2.13.2-1build2"
          },
          {
            "binary_name": "icinga2-ido-mysql",
            "binary_version": "2.13.2-1build2"
          },
          {
            "binary_name": "icinga2-ido-pgsql",
            "binary_version": "2.13.2-1build2"
          },
          {
            "binary_name": "vim-icinga2",
            "binary_version": "2.13.2-1build2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "icinga2",
        "purl": "pkg:deb/ubuntu/icinga2@2.13.2-1build2?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.12.3-1",
        "2.13.1-1",
        "2.13.2-1",
        "2.13.2-1build1",
        "2.13.2-1build2"
      ]
    }
  ],
  "aliases": [],
  "details": "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\u0027s 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.",
  "id": "UBUNTU-CVE-2021-37698",
  "modified": "2025-10-24T04:50:27Z",
  "published": "2021-08-19T16:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2021-37698"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2"
    },
    {
      "type": "REPORT",
      "url": "https://icinga.com/blog/2021/08/19/icinga-2-13-1-security-release/"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Icinga/icinga2/releases/tag/v2.13.1"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Icinga/icinga2/releases/tag/v2.12.6"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Icinga/icinga2/releases/tag/v2.11.11"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2021-37698"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2021-37698"
  ]
}



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