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Information Exposure The advisory has been revoked - it doesn't affect any version of package xen  (opens in a new tab)

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EPSS
0.4% (33rd percentile)

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  • Snyk IDSNYK-UBUNTU2204-XEN-2789834
  • published12 Nov 2020
  • disclosed10 Nov 2020
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Introduced: 10 Nov 2020

CVE-2020-28368  (opens in a new tab)
CWE-203  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:22.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream xen package and not the xen package as distributed by Ubuntu.

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.

References