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Privilege Escalation Affecting github.com/kubernetes/kubernetes/staging/src/k8s.io/apimachinery/pkg/util/proxy package, versions <1.10.11 >=1.11.0 <1.11.5 >=1.12.0 <1.12.3

0.0
critical

Snyk CVSS

    Attack Complexity Low
    Confidentiality High
    Integrity High
    Availability High

    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-GITHUBCOMKUBERNETESKUBERNETESSTAGINGSRCK8SIOAPIMACHINERYPKGUTILPROXY-72666
  • published 10 Dec 2018
  • disclosed 5 Dec 2018
  • credit Jordan Liggitt
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Introduced: 5 Dec 2018

CVE-2018-1002105 Open this link in a new tab
CWE-269 Open this link in a new tab

How to fix?

Upgrade github.com/kubernetes/kubernetes/staging/src/k8s.io/apimachinery/pkg/util/proxy to version 1.10.11, 1.11.5, 1.12.3 or higher.

Overview

github.com/kubernetes/kubernetes/staging/src/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.