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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 · CISA-ADP (v2.0.3)
Decision recorded 2025-04-23 15:57 UTC
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version CPE status
prometheus client_golang Affected: < 1.11.1
guessed Create a notification for this product.
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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": "2026-09-07T15:58:38+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": "219",
      "product_status:known_not_affected": "5260",
      "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": "2026-09-15T02:30:15Z",
      "cve": "CVE-2022-21698",
      "id": "CVE-2022-21698",
      "initial_release_date": "2023-02-15T03:29:06Z",
      "product_status:known_affected": "30",
      "product_status:known_not_affected": "98",
      "product_status:recommended": "636",
      "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": "68"
    },
    "vulnrichment": {
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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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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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.