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Ubuntu Security Notice USN-4628-3

Ubuntu Security Notice USN-4628-3
Posted May 17, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4628-3 - USN-4628-1 provided updated Intel Processor Microcode for various processor types. This update provides the corresponding updates for some additional processor types. Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running Average Power Limit 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. Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that some Intel 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. Ezra Caltum, Joseph Nuzman, Nir Shildan and Ofir Joseff discovered that some Intel Processors did not properly isolate shared resources in some situations. A local attacker could possibly use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2020-8695, CVE-2020-8696, CVE-2020-8698
SHA-256 | 9c7da2b2470de60b7a8d8d7efe50799848d6dbcea7454d96ae03812a657b6ddf

Ubuntu Security Notice USN-4628-3

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-4628-3
May 17, 2021

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

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

- Ubuntu 21.04
- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in Intel Microcode.

Software Description:
- intel-microcode: Processor microcode for Intel CPUs

Details:

USN-4628-1 provided updated Intel Processor Microcode for various processor
types. This update provides the corresponding updates for some additional
processor types.

Original advisory 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 21.04:
intel-microcode 3.20210216.0ubuntu0.21.04.1

Ubuntu 20.10:
intel-microcode 3.20210216.0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
intel-microcode 3.20210216.0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
intel-microcode 3.20210216.0ubuntu0.18.04.1

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

References:
https://ubuntu.com/security/notices/USN-4628-3
https://ubuntu.com/security/notices/USN-4628-1
CVE-2020-8695, CVE-2020-8696, CVE-2020-8698

Package Information:
https://launchpad.net/ubuntu/+source/intel-microcode/3.20210216.0ubuntu0.21.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20210216.0ubuntu0.20.10.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20210216.0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20210216.0ubuntu0.18.04.1
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