Upstream information

CVE-2020-8557 at MITRE

Description

The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 2.1
Vector AV:L/AC:L/Au:N/C:N/I:N/A:P
Access Vector Local
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 5.5 5.5
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Access Vector Local Local
Access Complexity Low Low
Privileges Required Low Low
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High High
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1173984 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
Container caasp/v4/caasp-dex:2.16.0
Image caasp-caasp-dex-image
  • caasp-dex >= 2.16.0-3.7.1
Container caasp/v4/cilium-operator:1.6.6
Image caasp-cilium-operator-image
  • cilium-operator >= 1.6.6-3.10.1
Container caasp/v4/cilium:1.6.6
Image caasp-cilium-image
  • cilium >= 1.6.6-3.10.1
  • cilium-cni >= 1.6.6-3.10.1
Container caasp/v4/gangway:3.1.0
Image caasp-gangway-image
  • gangway >= 3.1.0-4.5.1
Image caasp-hyperkube-image
  • kubernetes-common >= 1.17.4-4.18.1
Image caasp-kubernetes-client-image
Image caasp-kured-image
  • kubernetes-client >= 1.17.4-4.18.1
  • kubernetes-common >= 1.17.4-4.18.1
SUSE CaaS Platform 4.0
  • caasp-release >= 4.2.2-24.26.1
  • kubernetes >= 1.17.4-4.18.1
  • kubernetes-client >= 1.17.4-4.18.1
  • kubernetes-common >= 1.17.4-4.18.1
  • kubernetes-kubeadm >= 1.17.4-4.18.1
  • kubernetes-kubelet >= 1.17.4-4.18.1
  • skuba >= 1.4.1-3.46.1
  • skuba-update >= 1.4.1-3.46.1
Patchnames:
SUSE-SUSE-CAASP-4.0-2020-2204
SUSE Linux Enterprise Module for Containers 15 SP1
  • kubernetes >= 1.17.4-4.18.1
  • kubernetes-client >= 1.17.4-4.18.1
  • kubernetes-common >= 1.17.4-4.18.1
Patchnames:
SUSE-SLE-Module-Containers-15-SP1-2020-2204


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
Magnum Orchestration kubernetes Unsupported
SUSE CaaS Platform 3.0 kubernetes Unsupported
SUSE CaaS Platform 4.0 caasp-release Released
SUSE CaaS Platform 4.0 kubernetes Released
SUSE CaaS Platform 4.0 skuba Released
SUSE Container as a Service Platform 1.0 kubernetes Affected
SUSE Container as a Service Platform 2.0 kubernetes Unsupported
SUSE Linux Enterprise 12 Module for Public Cloud kubernetes Not affected
SUSE Linux Enterprise 15-SP1 Module for Containers kubernetes Released