CVE-2022-21698

{
  "id": "CVE-2022-21698",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-21698",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-23T15:57:33.264502Z"
        }
      }
    ],
    "cvssMetricV2": [
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        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "cvssData": {
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          "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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "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"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
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  },
  "affected": [
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      "source": "security-advisories@github.com",
      "affectedData": [
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          "vendor": "prometheus",
          "product": "client_golang",
          "versions": [
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              "status": "affected",
              "version": "< 1.11.1"
            }
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  ],
  "published": "2022-02-15T16:15:08.527",
  "references": [
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "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 instrumentación 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 Denegación de Servicio mediante una cardinalidad no limitada, y un potencial agotamiento de la memoria, cuando es manejado peticiones con métodos HTTP no estándar. Para ser afectado, un software instrumentado debe usar cualquiera de los middleware \"promhttp.InstrumentHandler*\" excepto \"RequestsInFlight\"; no filtrar ningún método específico (por ejemplo GET) antes del middleware; pasar la métrica con el nombre de la etiqueta \"method\" a nuestro middleware; y no presentar ningún firewall/LB/proxy que filtre las peticiones con \"method\" desconocido. client_golang versión 1.11.1 contiene un parche para este problema. Se presentan varias medidas de mitigación disponibles, incluyendo la eliminación del nombre de la etiqueta \"method\" del contador/calibre usado en el InstrumentHandler; la deshabilitación de los manejadores promhttp afectados; la adición de un middleware personalizado antes del manejador promhttp que sanee el método de petición dado por Go http.Request; y el uso de un proxy inverso o un firewall de aplicaciones web, configurado para permitir sólo un conjunto limitado de métodos"
    }
  ],
  "lastModified": "2026-06-17T04:26:47.200",
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