CVE-2021-37698

{"containers": {"cna": {"affected": [{"product": "icinga2", "vendor": "Icinga", "versions": [{"status": "affected", "version": ">= 2.5.0, <= 2.13.0"}]}], "descriptions": [{"lang": "en", "value": "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."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-295", "description": "CWE-295: Improper Certificate Validation", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-11-10T23:06:10.000Z", "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.11.11"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.12.6"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.13.1"}, {"name": "[debian-lts-announce] 20211110 [SECURITY] [DLA 2816-1] icinga2 security update", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html"}], "source": {"advisory": "GHSA-cxfm-8j5v-5qr2", "discovery": "UNKNOWN"}, "title": "Missing TLS service certificate validation in GelfWriter, ElasticsearchWriter, InfluxdbWriter and Influxdb2Writer", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security-advisories@github.com", "ID": "CVE-2021-37698", "STATE": "PUBLIC", "TITLE": "Missing TLS service certificate validation in GelfWriter, ElasticsearchWriter, InfluxdbWriter and Influxdb2Writer"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "icinga2", "version": {"version_data": [{"version_value": ">= 2.5.0, <= 2.13.0"}]}}]}, "vendor_name": "Icinga"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "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."}]}, "impact": {"cvss": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-295: Improper Certificate Validation"}]}]}, "references": {"reference_data": [{"name": "https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2", "refsource": "CONFIRM", "url": "https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2"}, {"name": "https://github.com/Icinga/icinga2/releases/tag/v2.11.11", "refsource": "MISC", "url": "https://github.com/Icinga/icinga2/releases/tag/v2.11.11"}, {"name": "https://github.com/Icinga/icinga2/releases/tag/v2.12.6", "refsource": "MISC", "url": "https://github.com/Icinga/icinga2/releases/tag/v2.12.6"}, {"name": "https://github.com/Icinga/icinga2/releases/tag/v2.13.1", "refsource": "MISC", "url": "https://github.com/Icinga/icinga2/releases/tag/v2.13.1"}, {"name": "[debian-lts-announce] 20211110 [SECURITY] [DLA 2816-1] icinga2 security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html"}]}, "source": {"advisory": "GHSA-cxfm-8j5v-5qr2", "discovery": "UNKNOWN"}}}, "adp": [{"title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.11.11"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.12.6"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.13.1"}, {"name": "[debian-lts-announce] 20211110 [SECURITY] [DLA 2816-1] icinga2 security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00010.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T21:45:10.788Z"}}]}, "cveMetadata": {"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "assignerShortName": "GitHub_M", "cveId": "CVE-2021-37698", "datePublished": "2021-08-19T13:55:10.000Z", "dateReserved": "2021-07-29T00:00:00.000Z", "dateUpdated": "2025-11-03T21:45:10.788Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

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{"affected": [{"affectedData": [{"product": "icinga2", "vendor": "Icinga", "versions": [{"status": "affected", "version": ">= 2.5.0, <= 2.13.0"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*", "matchCriteriaId": "F3D2866E-53F4-4990-92EA-B9234946CED9", "versionEndExcluding": "2.11.10", "versionStartIncluding": "2.5.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*", "matchCriteriaId": "5AD97DAA-C4A6-4BC2-BD67-9F3D038C2B05", "versionEndExcluding": "2.12.6", "versionStartIncluding": "2.12.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*", "matchCriteriaId": "1D1FD0A6-747B-4A8E-A130-0BE3C20AECA0", "versionEndExcluding": "2.13.1", "versionStartIncluding": "2.13.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "Icinga es un sistema de monitorizaci\u00f3n que comprueba la disponibilidad de los recursos de red, notifica a usuarios de las interrupciones y genera datos de rendimiento para la elaboraci\u00f3n de informes. En las versiones 2.5.0 a 2.13.0, los par\u00e1metros ElasticsearchWriter, GelfWriter, InfluxdbWriter e Influxdb2Writer no verifican el certificado del servidor a pesar de que se haya especificado una autoridad de certificaci\u00f3n. Las instancias de Icinga 2 que se conectan a cualquiera de las bases de datos de series temporales (TSDB) mencionadas usando TLS sobre una infraestructura falsificable deben actualizar inmediatamente a versiones 2.13.1, 2.12.6 o 2.11.11 para solucionar el problema. Dichas instancias tambi\u00e9n deben cambiar las credenciales (si las presenta) usadas por la funcionalidad TSDB writer para autenticarse contra la TSDB. No se presentan soluciones aparte de la actualizaci\u00f3n."}], "id": "CVE-2021-37698", "lastModified": "2026-06-17T04:01:00.543", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-08-19T16:15:12.420", "references": [{"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.11.11"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.12.6"}, {"source": "security-advisories@github.com", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.13.1"}, {"source": "security-advisories@github.com", "tags": ["Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2"}, {"source": "security-advisories@github.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.11.11"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.12.6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/releases/tag/v2.13.1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/Icinga/icinga2/security/advisories/GHSA-cxfm-8j5v-5qr2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2021/11/msg00010.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/11/msg00010.html"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-295"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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