CVE-2020-27352

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.

CVSS v3.1 Score

9.3

CRITICAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Weakness Type (CWE)

CWE-269 CWE-269

Affected Products

Vendor	Product	Versions
canonical	snapd	< 2.48.3
canonical	ubuntu_linux	All
canonical	ubuntu_linux	All
canonical	ubuntu_linux	All
canonical	ubuntu_linux	All

References

Advisories & Patches

https://ubuntu.com/security/notices/USN-4728-1 https://ubuntu.com/security/notices/USN-4728-1

Exploits

https://bugs.launchpad.net/snapd/+bug/1910456 https://bugs.launchpad.net/snapd/+bug/1910456

Other References

https://www.cve.org/CVERecord?id=CVE-2020-27352 https://www.cve.org/CVERecord?id=CVE-2020-27352

Frequently Asked Questions

What is CVE-2020-27352? +

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. It has a CVSS v3.1 base score of 9.3 (CRITICAL).

How severe is CVE-2020-27352? +

CVE-2020-27352 has a CVSS v3.1 score of 9.3 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2020-27352? +

CVE-2020-27352 affects products from canonical, specifically: snapd, ubuntu_linux. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2020-27352? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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