Auth bypass in Xen

CVE-2020-28368

Xen through 4.14.x allows guest OS administrators to obtain sensitive information (such as AES keys from outside the guest) via a side-channel attack on a power/energy monitoring interface, aka a "Platypus" attack. NOTE: there is only one logically independent fix: to change the access control for each such interface in Xen.

Vulnerability class: Broken Access Control

EPSS: 0.004 (32.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-28368?
CVE-2020-28368 is a medium-severity vulnerability in Xen, classified under Missing Authorization. CVSS score: 4.4/10. Published 2020-11-10.
How severe is CVE-2020-28368?
Medium severity. CVSS v3 base score is 4.4 out of 10.