Bug 2211322 (CVE-2023-2727)

Summary:	CVE-2023-2727 kube-apiserver: Bypassing policies imposed by the ImagePolicyWebhook admission plugin
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	askrabec, dfreiber, dhellmann, jburrell, joelsmith, rogbas, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kube-apiserver 1.27.3, kube-apiserver 1.26.6, kube-apiserver 1.25.11, kube-apiserver 1.24.15	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in Kubernetes, where users may be able to launch containers using images restricted by the ImagePolicyWebhook when using ephemeral containers. Kubernetes clusters are only affected if the ImagePolicyWebhook admission plugin is used together with ephemeral containers.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2215200, 2215202
Bug Blocks:	2209134

Description Avinash Hanwate 2023-05-31 06:02:16 UTC

A security issue was discovered in Kubernetes where users may be able to launch containers using images that are restricted by ImagePolicyWebhook 
when using ephemeral containers. Kubernetes clusters are only affected if the ImagePolicyWebhook admission plugin is used together with ephemeral 
containers.

This issue affects kube-apiserver. Clusters are impacted by this vulnerability if:
   1. The ImagePolicyWebhook admission plugin is used to restrict the use of certain images and 
   2. Pods using ephemeral containers.

Comment 3 Avinash Hanwate 2023-06-15 05:43:50 UTC

Created golang-k8s-kubernetes tracking bugs for this issue:

Affects: fedora-all [bug 2215200]


Created origin tracking bugs for this issue:

Affects: fedora-all [bug 2215202]

Comment 6 errata-xmlrpc 2023-10-31 14:20:05 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.14

Via RHSA-2023:5008 https://access.redhat.com/errata/RHSA-2023:5008