Vulnerabilities
Misconfiguration
Compliance
CVE Vulnerabilities

CVE-2020-8558

Unprotected Alternate Channel

Published: Jul 27, 2020 | Modified: Nov 21, 2024
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
5.8 MEDIUM
AV:A/AC:L/Au:N/C:P/I:P/A:P
RedHat/V2
RedHat/V3
5.4 MODERATE
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2020-8558
CWEhttps://cwe.mitre.org/data/definitions/420.html

The Kubelet and kube-proxy components in versions 1.1.0-1.16.10, 1.17.0-1.17.6, and 1.18.0-1.18.3 were found to contain a security issue which allows adjacent hosts to reach TCP and UDP services bound to 127.0.0.1 running on the node or in the nodes network namespace. Such a service is generally thought to be reachable only by other processes on the same host, but due to this defeect, could be reachable by other hosts on the same LAN as the node, or by containers running on the same node as the service.

Weakness

The product protects a primary channel, but it does not use the same level of protection for an alternate channel.

Affected Software

NameVendorStart VersionEnd Version
KubernetesKubernetes1.1.0 (including)1.16.10 (including)
KubernetesKubernetes1.17.0 (including)1.17.6 (including)
KubernetesKubernetes1.18.0 (including)1.18.3 (including)
Red Hat OpenShift Container Platform 3.11RedHatatomic-openshift-0:3.11.248-1.git.0.92ee8ac.el7*
Red Hat OpenShift Container Platform 4.3RedHatopenshift-0:4.3.31-202007280738.p0.git.0.9884401.el8*
Red Hat OpenShift Container Platform 4.3RedHatopenshift4/ose-hyperkube:v4.3.31-202007272153.p0*
Red Hat OpenShift Container Platform 4.4RedHatopenshift4/ose-hyperkube:v4.4.0-202007120152.p0*
Red Hat OpenShift Container Platform 4.4RedHatopenshift-0:4.4.0-202007090832.p0.git.0.bc32fb1.el8*
Red Hat OpenShift Container Platform 4.5RedHatopenshift4/ose-hyperkube:v4.5.0-202007100518.p0*
Red Hat OpenShift Container Platform 4.5RedHatopenshift-0:4.5.0-202007012112.p0.git.0.582d7fc.el8*
KubernetesUbuntueoan*
KubernetesUbuntufocal*
KubernetesUbuntugroovy*
KubernetesUbuntuhirsute*
KubernetesUbuntuimpish*
KubernetesUbuntukinetic*
KubernetesUbuntulunar*
KubernetesUbuntumantic*
KubernetesUbuntuoracular*

Potential Mitigations

References

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