Bug 2160349 (CVE-2023-0229)

Summary:	CVE-2023-0229 openshift/apiserver-library-go: Bypass of SCC seccomp profile restrictions
Product:	[Other] Security Response	Reporter:	Sam Fowler <sfowler>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	dfreiber, jburrell, joelsmith, rkshirsa, rogbas, sfowler, vkumar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in github.com/openshift/apiserver-library-go, used in OpenShift 4.12 and 4.11, that contains an issue that can allow low-privileged users to set the seccomp profile for pods they control to "unconfined." By default, the seccomp profile used in the restricted-v2 Security Context Constraint (SCC) is "runtime/default," allowing users to disable seccomp for pods they can create and modify.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-05-18 06:31:36 UTC	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:
Bug Blocks:	2155150, 2160352

Description Sam Fowler 2023-01-12 06:11:03 UTC

In github.com/openshift/apiserver-library-go, used in OpenShift 4.12 and 4.11, a bug was found that can allows low privileged users to set the seccomp profile for pods they control to "unconfined". By default the seccomp profile used in the restricted-v2 Security Context Contstraint (SCC) is "runtime/default", thus this bug allows users disable seccomp for pods they can create and/or modify.

Seccomp is one of many security layers used in OpenShift, including SELinux, dropping of capabilities and running as non-root, so on its own disabling of seccomp does not allow a direct path to privilege escalation. However, it is possible that exploit of this bug could be used in combination with another vulnerability, e.g. a potential kernel privilege escalation flaw, to allow a user to escape a container.

Comment 7 errata-xmlrpc 2023-05-17 22:53:37 UTC

This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.13

Via RHSA-2023:1325 https://access.redhat.com/errata/RHSA-2023:1325

Comment 8 Product Security DevOps Team 2023-05-18 06:31:34 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2023-0229