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CVE-2020-11933 Details

Description

cloud-init as managed by snapd on Ubuntu Core 16 and Ubuntu Core 18 devices was run without restrictions on every boot, which a physical attacker could exploit by crafting cloud-init user-data/meta-data via external media to perform arbitrary changes on the device to bypass intended security mechanisms such as full disk encryption. This issue did not affect traditional Ubuntu systems. Fixed in snapd version 2.45.2, revision 8539 and core version 2.45.2, revision 9659.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.8 MEDIUMVector:CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://launchpad.net/bugs/1879530	CVE	Third Party Advisory
https://ubuntu.com/USN-4424-1	CVE	Vendor Advisory
https://launchpad.net/bugs/1879530	[email protected]	Third Party Advisory
https://ubuntu.com/USN-4424-1	[email protected]	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-Other	Weakness Not in a Standard CWE Category	[email protected]
CWE-264	Permissions, Privileges, and Access Controls	[email protected]

Affected Products

Product	Versions
canonical snapd	< 2.45.2
CPE cpe:2.3:a:canonical:snapd:::::::: Remediation No remediation found in references.
canonical ubuntu linux	16.04 18.04 19.10 20.04
CPE 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:19.10:::::::* cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts::: Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 4, 2021	Reanalysis	[email protected]
Aug 5, 2020	Initial Analysis	[email protected]