Bug 1927428

Summary:	snapd: Access restriction could be bypassed by container management snaps
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	go-sig, maciek.borzecki, me, ngompa13
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-02-10 22:09:58 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:	1927431, 1927432
Bug Blocks:

Description Pedro Sampaio 2021-02-10 17:25:46 UTC

Snapd did not correctly specify cgroup delegation when generating systemd service units for various container management snaps. This could allow a local attacker to escalate privileges via access to arbitrary devices of the container host from within a compromised or malicious container.

References:

https://packetstormsecurity.com/files/161359/USN-4728-1.txt

Comment 1 Pedro Sampaio 2021-02-10 17:27:38 UTC

Created snapd tracking bugs for this issue:

Affects: epel-all [bug 1927432]
Affects: fedora-all [bug 1927431]

Comment 2 Product Security DevOps Team 2021-02-10 22:09:58 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.