Ubuntu 20.10, 20.04 LTS, 18.04 LTS: Intel Microcode Security Advisory

ubuntu

November 11, 2020

Several security issues were fixed in Intel Microcode.

Summary

Several security issues were fixed in Intel Microcode.

Software Description:

- intel-microcode: Processor microcode for Intel CPUs

Details:

Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine

Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running

Average Power Limit (RAPL) feature of some Intel processors allowed a side-

channel attack based on power consumption measurements. A local attacker

could possibly use this to expose sensitive information. (CVE-2020-8695)

Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that

some Intel(R) Processors did not properly remove sensitive information

before storage or transfer in some situations. A local attacker could

possibly use this to expose sensitive information. (CVE-2020-8696)

Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that

some Intel(R) Processors did not properly isolate shared resources in some

situations. A local attacker could possibly use this to ...

Read the Full Advisory

Topics Covered

security advisory local attack ubuntu sensitive information intel microcode

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
  intel-microcode                 3.20201110.0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  intel-microcode                 3.20201110.0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  intel-microcode                 3.20201110.0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  intel-microcode                 3.20201110.0ubuntu0.16.04.1

Ubuntu 14.04 ESM:
  intel-microcode                 3.20201110.0ubuntu0.14.04.1

After a standard system update you need to reboot your computer to make
all the necessary changes.