CVE-2022-21698 (GCVE-0-2022-21698)

Vulnerability from cvelistv5 – Published: 2022-02-15 00:00 – Updated: 2025-04-23 19:05
VLAI
Title
Uncontrolled Resource Consumption in promhttp
Summary
client_golang is the instrumentation library for Go applications in Prometheus, and the promhttp package in client_golang provides tooling around HTTP servers and clients. In client_golang prior to version 1.11.1, HTTP server is susceptible to a Denial of Service through unbounded cardinality, and potential memory exhaustion, when handling requests with non-standard HTTP methods. In order to be affected, an instrumented software must use any of `promhttp.InstrumentHandler*` middleware except `RequestsInFlight`; not filter any specific methods (e.g GET) before middleware; pass metric with `method` label name to our middleware; and not have any firewall/LB/proxy that filters away requests with unknown `method`. client_golang version 1.11.1 contains a patch for this issue. Several workarounds are available, including removing the `method` label name from counter/gauge used in the InstrumentHandler; turning off affected promhttp handlers; adding custom middleware before promhttp handler that will sanitize the request method given by Go http.Request; and using a reverse proxy or web application firewall, configured to only allow a limited set of methods.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
prometheus client_golang Affected: < 1.11.1
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      "descriptions": "[{\"lang\": \"en\", \"value\": \"client_golang is the instrumentation library for Go applications in Prometheus, and the promhttp package in client_golang provides tooling around HTTP servers and clients. In client_golang prior to version 1.11.1, HTTP server is susceptible to a Denial of Service through unbounded cardinality, and potential memory exhaustion, when handling requests with non-standard HTTP methods. In order to be affected, an instrumented software must use any of `promhttp.InstrumentHandler*` middleware except `RequestsInFlight`; not filter any specific methods (e.g GET) before middleware; pass metric with `method` label name to our middleware; and not have any firewall/LB/proxy that filters away requests with unknown `method`. client_golang version 1.11.1 contains a patch for this issue. Several workarounds are available, including removing the `method` label name from counter/gauge used in the InstrumentHandler; turning off affected promhttp handlers; adding custom middleware before promhttp handler that will sanitize the request method given by Go http.Request; and using a reverse proxy or web application firewall, configured to only allow a limited set of methods.\"}, {\"lang\": \"es\", \"value\": \"client_golang es la biblioteca de instrumentaci\\u00f3n para aplicaciones Go en Prometheus, y el paquete promhttp en client_golang proporciona herramientas en torno a los servidores y clientes HTTP. En client_golang versiones anteriores a 1.11.1, el servidor HTTP es susceptible de una Denegaci\\u00f3n de Servicio mediante una cardinalidad no limitada, y un potencial agotamiento de la memoria, cuando es manejado peticiones con m\\u00e9todos HTTP no est\\u00e1ndar. Para ser afectado, un software instrumentado debe usar cualquiera de los middleware \\\"promhttp.InstrumentHandler*\\\" excepto \\\"RequestsInFlight\\\"; no filtrar ning\\u00fan m\\u00e9todo espec\\u00edfico (por ejemplo GET) antes del middleware; pasar la m\\u00e9trica con el nombre de la etiqueta \\\"method\\\" a nuestro middleware; y no presentar ning\\u00fan firewall/LB/proxy que filtre las peticiones con \\\"method\\\" desconocido. client_golang versi\\u00f3n 1.11.1 contiene un parche para este problema. Se presentan varias medidas de mitigaci\\u00f3n disponibles, incluyendo la eliminaci\\u00f3n del nombre de la etiqueta \\\"method\\\" del contador/calibre usado en el InstrumentHandler; la deshabilitaci\\u00f3n de los manejadores promhttp afectados; la adici\\u00f3n de un middleware personalizado antes del manejador promhttp que sanee el m\\u00e9todo de petici\\u00f3n dado por Go http.Request; y el uso de un proxy inverso o un firewall de aplicaciones web, configurado para permitir s\\u00f3lo un conjunto limitado de m\\u00e9todos\"}]",
      "id": "CVE-2022-21698",
      "lastModified": "2024-11-21T06:45:15.423",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"security-advisories@github.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:N/I:N/A:P\", \"baseScore\": 5.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 10.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2022-02-15T16:15:08.527",
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      "sourceIdentifier": "security-advisories@github.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"security-advisories@github.com\", \"type\": \"Secondary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-400\"}]}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-770\"}]}]"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T03:19:01.000Z",
      "cve": "CVE-2022-21698",
      "id": "msrc_CVE-2022-21698",
      "initial_release_date": "2022-02-02T00:00:00.000Z",
      "product_status:fixed": "26",
      "product_status:known_affected": "26",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Uncontrolled Resource Consumption in promhttp",
      "url": "https://msrc.microsoft.com/csaf/vex/2022/msrc_cve-2022-21698.json",
      "version": "16"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-21698\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2022-02-15T16:15:08.527\",\"lastModified\":\"2026-06-17T04:26:47.200\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"client_golang is the instrumentation library for Go applications in Prometheus, and the promhttp package in client_golang provides tooling around HTTP servers and clients. In client_golang prior to version 1.11.1, HTTP server is susceptible to a Denial of Service through unbounded cardinality, and potential memory exhaustion, when handling requests with non-standard HTTP methods. In order to be affected, an instrumented software must use any of `promhttp.InstrumentHandler*` middleware except `RequestsInFlight`; not filter any specific methods (e.g GET) before middleware; pass metric with `method` label name to our middleware; and not have any firewall/LB/proxy that filters away requests with unknown `method`. client_golang version 1.11.1 contains a patch for this issue. Several workarounds are available, including removing the `method` label name from counter/gauge used in the InstrumentHandler; turning off affected promhttp handlers; adding custom middleware before promhttp handler that will sanitize the request method given by Go http.Request; and using a reverse proxy or web application firewall, configured to only allow a limited set of methods.\"},{\"lang\":\"es\",\"value\":\"client_golang es la biblioteca de instrumentaci\u00f3n para aplicaciones Go en Prometheus, y el paquete promhttp en client_golang proporciona herramientas en torno a los servidores y clientes HTTP. En client_golang versiones anteriores a 1.11.1, el servidor HTTP es susceptible de una Denegaci\u00f3n de Servicio mediante una cardinalidad no limitada, y un potencial agotamiento de la memoria, cuando es manejado peticiones con m\u00e9todos HTTP no est\u00e1ndar. Para ser afectado, un software instrumentado debe usar cualquiera de los middleware \\\"promhttp.InstrumentHandler*\\\" excepto \\\"RequestsInFlight\\\"; no filtrar ning\u00fan m\u00e9todo espec\u00edfico (por ejemplo GET) antes del middleware; pasar la m\u00e9trica con el nombre de la etiqueta \\\"method\\\" a nuestro middleware; y no presentar ning\u00fan firewall/LB/proxy que filtre las peticiones con \\\"method\\\" desconocido. client_golang versi\u00f3n 1.11.1 contiene un parche para este problema. Se presentan varias medidas de mitigaci\u00f3n disponibles, incluyendo la eliminaci\u00f3n del nombre de la etiqueta \\\"method\\\" del contador/calibre usado en el InstrumentHandler; la deshabilitaci\u00f3n de los manejadores promhttp afectados; la adici\u00f3n de un middleware personalizado antes del manejador promhttp que sanee el m\u00e9todo de petici\u00f3n dado por Go http.Request; y el uso de un proxy inverso o un firewall de aplicaciones web, configurado para permitir s\u00f3lo un conjunto limitado de m\u00e9todos\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"prometheus\",\"product\":\"client_golang\",\"versions\":[{\"version\":\"\u003c 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T03:47:00+00:00",
      "cve": "CVE-2022-21698",
      "id": "CVE-2022-21698",
      "initial_release_date": "2022-02-15T00:00:00+00:00",
      "product_status:fixed": "1323",
      "product_status:known_affected": "218",
      "product_status:known_not_affected": "5259",
      "product_status:under_investigation": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "prometheus/client_golang: Denial of service using InstrumentHandlerCounter",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-21698.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-01T23:31:33Z",
      "cve": "CVE-2022-21698",
      "id": "CVE-2022-21698",
      "initial_release_date": "2023-02-15T03:29:06Z",
      "product_status:first_fixed": "9",
      "product_status:known_affected": "32",
      "product_status:known_not_affected": "98",
      "product_status:recommended": "630",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-21698",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-21698.json",
      "version": "63"
    },
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\"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-03T02:53:34.814Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-21698\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-04-23T15:57:33.264502Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-04-23T15:57:35.059Z\"}}], \"cna\": {\"title\": \"Uncontrolled Resource Consumption in promhttp\", \"source\": {\"advisory\": \"GHSA-cg3q-j54f-5p7p\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"prometheus\", \"product\": \"client_golang\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 1.11.1\"}]}], \"references\": [{\"url\": \"https://github.com/prometheus/client_golang/security/advisories/GHSA-cg3q-j54f-5p7p\"}, {\"url\": \"https://github.com/prometheus/client_golang/pull/962\"}, {\"url\": \"https://github.com/prometheus/client_golang/pull/987\"}, {\"url\": \"https://github.com/prometheus/client_golang/releases/tag/v1.11.1\"}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FY3N7H6VSDZM37B4SKM2PFFCUWU7QYWN/\", \"name\": \"FEDORA-2022-5f253807ce\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZKORFJTRRDJCWBTJPISKKCVMMMJBIRLG/\", \"name\": \"FEDORA-2022-6c4cb64314\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AK7CJBCGERCRXYUR2EWDSSDVAQMTAZGX/\", \"name\": \"FEDORA-2022-eda0e65b01\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SASRKYHT5ZFSVMJUQUG3UAEQRJYGJKAR/\", \"name\": \"FEDORA-2022-6043a7b938\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/KBMVIQFKQDSSTHVVJWJ4QH6TW3JVB7XZ/\", \"name\": \"FEDORA-2022-e244ad73d6\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7V7I72LSQ3IET3QJR6QPAVGJZ4CBDLN5/\", \"name\": \"FEDORA-2022-a7d438b30b\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HLAQRRGNSO5MYCPAXGPH2OCSHOGHSQMQ/\", \"name\": \"FEDORA-2022-83405f9d5b\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2PFW6Q2LXXWTFRTMTRN4ZGADFRQPKJ3D/\", \"name\": \"FEDORA-2022-9dd03cab55\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J5WPM42UR6XIBQNQPNQHM32X7S4LJTRX/\", \"name\": \"FEDORA-2022-c87047f163\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4KDETHL5XCT6RZN2BBNOCEXRZ2W3SFU3/\", \"name\": \"FEDORA-2022-2067702f06\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/36GUEPA5TPSC57DZTPYPBL6T7UPQ2FRH/\", \"name\": \"FEDORA-2022-c5383675d9\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DLUJZV3HBP56ADXU6QH2V7RNYUPMVBXQ/\", \"name\": \"FEDORA-2022-5e637f6cc6\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2IK53GWZ475OQ6ENABKMJMTOBZG6LXUR/\", \"name\": \"FEDORA-2022-396c568c5e\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MH6ALXEQXIFQRQFNJ5Y2MJ5DFPIX76VN/\", \"name\": \"FEDORA-2022-92ef43c439\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZY2SLWOQR4ZURQ7UBRZ7JIX6H6F5JHJR/\", \"name\": \"FEDORA-2022-fae3ecee19\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RN7JGC2LVHPEGSJYODFUV5FEKPBVG4D7/\", \"name\": \"FEDORA-2022-739c7a0058\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5OGNAFVXSMTTT2UPH6CS3IH6L3KM42Q7/\", \"name\": \"FEDORA-2022-13ad572b5a\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3L6GDN5S5QZSCFKWD3GKL2RDZQ6B4UWA/\", \"name\": \"FEDORA-2022-741325e9a0\", \"tags\": [\"vendor-advisory\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"client_golang is the instrumentation library for Go applications in Prometheus, and the promhttp package in client_golang provides tooling around HTTP servers and clients. In client_golang prior to version 1.11.1, HTTP server is susceptible to a Denial of Service through unbounded cardinality, and potential memory exhaustion, when handling requests with non-standard HTTP methods. In order to be affected, an instrumented software must use any of `promhttp.InstrumentHandler*` middleware except `RequestsInFlight`; not filter any specific methods (e.g GET) before middleware; pass metric with `method` label name to our middleware; and not have any firewall/LB/proxy that filters away requests with unknown `method`. client_golang version 1.11.1 contains a patch for this issue. Several workarounds are available, including removing the `method` label name from counter/gauge used in the InstrumentHandler; turning off affected promhttp handlers; adding custom middleware before promhttp handler that will sanitize the request method given by Go http.Request; and using a reverse proxy or web application firewall, configured to only allow a limited set of methods.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400: Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2022-11-14T00:00:00.000Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-21698\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-04-23T19:05:16.614Z\", \"dateReserved\": \"2021-11-16T00:00:00.000Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2022-02-15T00:00:00.000Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.