CVE-2020-27352
Snapd Systemd Privilege Escalation Vulnerability
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.
INFO
Published Date :
June 21, 2024, 8:15 p.m.
Last Modified :
Aug. 26, 2025, 5:20 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the affected packages.
Public PoC/Exploit Available at Github
CVE-2020-27352 has a 4 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-27352.
| URL | Resource |
|---|---|
| https://bugs.launchpad.net/snapd/+bug/1910456 | Exploit Issue Tracking |
| https://ubuntu.com/security/notices/USN-4728-1 | Vendor Advisory |
| https://www.cve.org/CVERecord?id=CVE-2020-27352 | Third Party Advisory |
| https://bugs.launchpad.net/snapd/+bug/1910456 | Exploit Issue Tracking |
| https://ubuntu.com/security/notices/USN-4728-1 | Vendor Advisory |
| https://www.cve.org/CVERecord?id=CVE-2020-27352 | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-27352 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-27352
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
None
None
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Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2020-27352 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-27352 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Aug. 26, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:* versions up to (excluding) 2.48.3 Added CPE Configuration OR *cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:* *cpe:2.3:o:canonical:ubuntu_linux:20.10:*:*:*:*:*:*:* Added Reference Type CVE: https://bugs.launchpad.net/snapd/+bug/1910456 Types: Exploit, Issue Tracking Added Reference Type Canonical Ltd.: https://bugs.launchpad.net/snapd/+bug/1910456 Types: Exploit, Issue Tracking Added Reference Type CVE: https://ubuntu.com/security/notices/USN-4728-1 Types: Vendor Advisory Added Reference Type Canonical Ltd.: https://ubuntu.com/security/notices/USN-4728-1 Types: Vendor Advisory Added Reference Type CVE: https://www.cve.org/CVERecord?id=CVE-2020-27352 Types: Third Party Advisory Added Reference Type Canonical Ltd.: https://www.cve.org/CVERecord?id=CVE-2020-27352 Types: Third Party Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://bugs.launchpad.net/snapd/+bug/1910456 Added Reference https://ubuntu.com/security/notices/USN-4728-1 Added Reference https://www.cve.org/CVERecord?id=CVE-2020-27352 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 11, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-269 -
CVE Received by [email protected]
Jun. 21, 2024
Action Type Old Value New Value Added 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. Added Reference Canonical Ltd. https://bugs.launchpad.net/snapd/+bug/1910456 [No types assigned] Added Reference Canonical Ltd. https://ubuntu.com/security/notices/USN-4728-1 [No types assigned] Added Reference Canonical Ltd. https://www.cve.org/CVERecord?id=CVE-2020-27352 [No types assigned] Added CVSS V3.1 Canonical Ltd. AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H