Linux Security
Linux Security
Linux Security

Ubuntu 4628-1: Intel Microcode vulnerabilities

Date 11 Nov 2020
740
Posted By LinuxSecurity Advisories
Several security issues were fixed in Intel Microcode.
==========================================================================
Ubuntu Security Notice USN-4628-1
November 11, 2020

intel-microcode vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

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 expose sensitive
information. (CVE-2020-8698)

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.

References:
  https://usn.ubuntu.com/4628-1
  CVE-2020-8695, CVE-2020-8696, CVE-2020-8698

Package Information:
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.20.10.1
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.18.04.1
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20201110.0ubuntu0.16.04.1

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[{"id":"179","title":"As soon as patches\/updates are released - I track advisories for my distro(s) diligently","votes":"47","type":"x","order":"1","pct":79.66,"resources":[]},{"id":"180","title":"Every so often, when I think of it","votes":"7","type":"x","order":"2","pct":11.86,"resources":[]},{"id":"181","title":"Hardly ever","votes":"5","type":"x","order":"3","pct":8.47,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350

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