Bug 2293728 (CVE-2020-27352)

Summary:	CVE-2020-27352 snapd: access restriction can be bypassed by container management snaps
Product:	[Other] Security Response	Reporter:	Robb Gatica <rgatica>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:	2293729, 2293730
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Description Robb Gatica 2024-06-21 21:09:48 UTC

When generating the systemd service units for the docker snap (and other similar snaps), snapd does not specify Delegate=yes - as a result systemd will move processes from the containers created and managed by these snaps into the cgroup of the main daemon within the snap itself when reloading system units. This may grant additional privileges to a container within the snap that were not originally intended.

https://bugs.launchpad.net/snapd/+bug/1910456
https://ubuntu.com/security/notices/USN-4728-1
https://www.cve.org/CVERecord?id=CVE-2020-27352

Comment 1 Robb Gatica 2024-06-21 21:10:05 UTC

Created snapd tracking bugs for this issue:

Affects: epel-all [bug 2293729]
Affects: fedora-all [bug 2293730]