Package: golang-github-prometheus-client-golang X-Debbugs-CC: t...@security.debian.org Severity: important Tags: security
Hi, The following vulnerability was published for golang-github-prometheus-client- golang. CVE-2022-21698[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2022-21698 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21698 Please adjust the affected versions in the BTS as needed. Regards, Markus
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