Privilege Escalation The advisory has been revoked - it doesn't affect any version of package k8s.io/apimachinery/pkg/util/proxy Open this link in a new tab


    Threat Intelligence

    Exploit Maturity Mature
    EPSS 47.45% (98th percentile)
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NVD
9.8 critical
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Red Hat
9.8 critical

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  • Snyk ID SNYK-GOLANG-K8SIOAPIMACHINERYPKGUTILPROXY-174797
  • published 10 Dec 2018
  • disclosed 5 Dec 2018
  • credit Jordan Liggitt

Amendment

This was deemed not a vulnerability.

Overview

k8s.io/apimachinery/pkg/util/proxy is a package that provides transport and upgrade support for proxies.

Affected versions of this package are vulnerable to Privilege Escalation. Incorrect handling of error responses to proxied upgrade requests in the kube-apiserver allowed specially crafted requests to establish a connection through the Kubernetes API server to backend servers, then send arbitrary requests over the same connection directly to the backend, authenticated with the Kubernetes API server's TLS credentials used to establish the backend connection.