Bug 2022017 (CVE-2021-3948)

Summary:	CVE-2021-3948 mig-controller: incorrect namespaces handling may lead to not authorized usage of Migration Toolkit for Containers (MTC)
Product:	[Other] Security Response	Reporter:	Przemyslaw Roguski <proguski>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	adsoni, dwhatley, dymurray, ibolton, jmatthew, jmontleo, rjohnson, slucidi, sseago
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	konveyor/mig-controller release-1.5.2, konveyor/mig-controller release-1.6.3	Doc Type:	If docs needed, set a value
Doc Text:	An incorrect default permissions vulnerability was found in the mig-controller. Due to an incorrect cluster namespaces handling an attacker may be able to migrate a malicious workload to the target cluster, impacting confidentiality, integrity, and availability of the services located on that cluster.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2022-01-20 07:31:10 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:	2022479, 2022480
Bug Blocks:	2021991, 2022409

Description Przemyslaw Roguski 2021-11-10 15:10:34 UTC

The Migration Toolkit for Containers (MTC) enables you to migrate stateful application workloads between OpenShift Container Platform 4 clusters at the granularity of a namespace. By default the migration process should be available only for users with cluster-admin privileges on all clusters (source and target). The controller watches ALL namespaces, rather than strictly the openshift-migration namespace, what may lead to not-authorized usage of the Migration Toolkit for Containers (MTC). 

Users with permissions to create MigPlans and MigMigrations CRDs (namespace admins) may create them in their own namespace. 
That would provide a way to register their own (potentially crafted) cluster (source) with a MigCluster in their namespace on the target cluster and migrate malicious workload to the target cluster. Potentially that may lead to the exposure of sensitive information or even may provide a way to permission escalation.

Comment 3 Przemyslaw Roguski 2021-11-24 10:15:22 UTC

Upstream PRs:
https://github.com/konveyor/mig-controller/pull/1230
https://github.com/konveyor/mig-controller/pull/1228

Comment 4 errata-xmlrpc 2021-11-29 14:32:34 UTC

This issue has been addressed in the following products:

  Red Hat Migration Toolkit for Containers 1.5

Via RHSA-2021:4848 https://access.redhat.com/errata/RHSA-2021:4848

Comment 5 errata-xmlrpc 2022-01-20 06:31:33 UTC

This issue has been addressed in the following products:

  Red Hat Migration Toolkit for Containers 1.6

Via RHSA-2022:0202 https://access.redhat.com/errata/RHSA-2022:0202

Comment 6 Product Security DevOps Team 2022-01-20 07:31:08 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-2021-3948