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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Configurations
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History
07 Nov 2023, 03:43
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24 Jul 2023, 13:50
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CWE | CWE-770 |
Information
Published : 2022-02-15 16:15
Updated : 2024-02-28 19:09
NVD link : CVE-2022-21698
Mitre link : CVE-2022-21698
CVE.ORG link : CVE-2022-21698
JSON object : View
Products Affected
prometheus
- client_golang
fedoraproject
- fedora
- extra_packages_for_enterprise_linux
rdo_project
- rdo