CVE-2022-21698 @ Go-github.com/prometheus/client_golang-v1.11.0

[diogopcx]

Vulnerable Package issue exists @ Go-github.com/prometheus/client_golang-v1.11.0 in branch main

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.

Namespace: diogopcx
Repository: CheckmarxDemo
Repository Url: https://github.com/diogopcx/CheckmarxDemo
CxAST-Project: diogopcx/CheckmarxDemo
CxAST platform scan: 358cac2e-8dd5-43e9-8390-980528e9e4ce
Branch: main
Application: CheckmarxDemo
Severity: HIGH
State: TO_VERIFY
Status: RECURRENT
CWE: CWE-772

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Additional Info
Attack vector: NETWORK
Attack complexity: LOW
Confidentiality impact: NONE
Availability impact: HIGH

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References
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