CVE-2020-11933

local snapd exploit through cloud-init

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.

Category

7.3
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.03%
Vendor Advisory ubuntu.com
Affected: Canonical snapd
Affected: Canonical core
Published at:
Updated at:

References

Link Tags
https://launchpad.net/bugs/1879530 third party advisory
https://ubuntu.com/USN-4424-1 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2020-11933?
CVE-2020-11933 has been scored as a high severity vulnerability.
How to fix CVE-2020-11933?
To fix CVE-2020-11933, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-11933 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2020-11933 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-11933?
CVE-2020-11933 affects Canonical snapd, Canonical core.
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