FKIE_CVE-2022-21698
Vulnerability from fkie_nvd - Published: 2022-02-15 16:15 - Updated: 2024-11-21 06:45
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| prometheus | client_golang | * | |
| fedoraproject | fedora | 34 | |
| fedoraproject | fedora | 35 | |
| fedoraproject | fedora | 36 | |
| fedoraproject | extra_packages_for_enterprise_linux | 7.0 | |
| fedoraproject | extra_packages_for_enterprise_linux | 8.0 | |
| rdo_project | rdo | - | |
| fedoraproject | fedora | 35 | |
| fedoraproject | fedora | 36 | |
| fedoraproject | fedora | 37 |
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"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."
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"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"
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"id": "CVE-2022-21698",
"lastModified": "2024-11-21T06:45:15.423",
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]
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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