Vulnerability · Published Jun 21, 2024 · Assigned by canonical

CVE-2020-27352

Critical 9.3

In plain English

A critical-severity privilege mismanagement in snapd from Canonical Ltd.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.3Critical

Exploit odds (30 days)0.3%top 82.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	snapd	2.49-1	DEBIAN-CVE-2020-27352
Debian:13	snapd	2.49-1	DEBIAN-CVE-2020-27352
Debian:14	snapd	2.49-1	DEBIAN-CVE-2020-27352

Affected products (as reported)

Vendor	Product	Versions
Canonical Ltd.	snapd	0 – before 2.48.3

Weakness: CWE-269 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

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