Vulnerability in Canonical Core
CVE-2020-11933
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (11.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Canonical Core — versions 2.45.2
- Canonical Snapd — versions 2.45.2
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.10
Weakness classification (CWE)
References
- launchpad.net/bugs/1879530 (Third Party Advisory)
- ubuntu.com/USN-4424-1 (Vendor Advisory)
Frequently asked questions
- What is CVE-2020-11933?
- CVE-2020-11933 is a high-severity vulnerability in Canonical Core, classified under CWE-264. CVSS score: 7.3/10. Published 2020-07-29.
- How severe is CVE-2020-11933?
- High severity. CVSS v3 base score is 7.3 out of 10.