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Security Vulnerability: Power Consumption based side-channel attacks aka PLATYPUS (RAPL / CVE-2020-8694 / CVE-2020-8695)

This document (000019778) is provided subject to the disclaimer at the end of this document.


SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server 12


Security researchers have identified a new side-channel information leak attack against Intel CPU's.

Current Intel CPU's expose fine-grained power consumption meter values of various CPU components, which can be used as a information leak side channel to CPU operations with varying power consumption, including cryptographic operations.

Researchers have shown potential extraction of cryptographic key material in controlled settings when executing code on a non-loaded machine.


SUSE is addressing the two separate sets of area's affecting this issue as outlined below :
  • CVE-2020-8694: The Linux kernel was exposing the power consumption counters to local users.
SUSE has released Linux kernel updates to restrict these registers to the "root" user only.
  • CVE-2020-8695: The Intel CPU Microcode was updated to adjust the SGX enclaves power metering to be   less fine-grained, avoiding the side channel leakage of information out of SGX enclaves.
SUSE has released Intel CPU Microcode updates to address this issue.



Security Alert

Additional Information

For reference : 
As a workaround for the following vulnerability:
  • CVE-2020-8694
On a running system the permissions of the power registers can be restricted to 'root' using the following command:
chmod og-rwx /sys/class/powercap/intel_rapl/*/energy_uj


This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.

  • Document ID:000019778
  • Creation Date: 10-Nov-2020
  • Modified Date:10-Nov-2020
    • SUSE Linux Enterprise Server
    • SUSE Linux Enterprise Server for SAP Applications

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