CVE-2022-21698

Name
CVE-2022-21698
Description
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.
NVD Severity
medium
Other trackers
Mailing lists
Exploits
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
MISC https://github.com/prometheus/client_golang/pull/962
MISC https://github.com/prometheus/client_golang/releases/tag/v1.11.1
CONFIRM https://github.com/prometheus/client_golang/security/advisories/GHSA-cg3q-j54f-5p7p
MISC https://github.com/prometheus/client_golang/pull/987
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FY3N7H6VSDZM37B4SKM2PFFCUWU7QYWN/
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FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/SASRKYHT5ZFSVMJUQUG3UAEQRJYGJKAR/
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AK7CJBCGERCRXYUR2EWDSSDVAQMTAZGX/
FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KBMVIQFKQDSSTHVVJWJ4QH6TW3JVB7XZ/
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FEDORA https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MH6ALXEQXIFQRQFNJ5Y2MJ5DFPIX76VN/
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Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:prometheus:client_golang:*:*:*:*:*:go:*:* client_golang >= None < 1.11.1

Vulnerable and fixed packages

Source package Branch Version Maintainer Status