USN-4628-2: Intel Microcode regression

23771

13 January 2021

13 January 2021

CLOSED

MEDIUM

CVE-2020-8695,CVE-2020-8696,CVE-2020-8698

Severity

Medium

Vendor

Canonical Ubuntu

Versions Affected

  • Canonical Ubuntu 14.04
  • Canonical Ubuntu 16.04

Description

USN-4628-1 provided updated Intel Processor Microcode. Unfortunately, that update prevented certain processors in the Intel Tiger Lake family from booting successfully. This update reverts the microcode update for the Tiger Lake processor family.

Please note that the 'dis_ucode_ldr' kernel command line option can be added in the boot menu to disable microcode loading for system recovery.

We apologize for the inconvenience.

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)

CVEs contained in this USN include: CVE-2020-8698, CVE-2020-8696, CVE-2020-8695

Affected VMware Products and Versions

Severity is medium unless otherwise noted.

Vulnerable Cloud Foundry components individually listed here. Impacted stemcells may be updated independently of upgrading Tanzu Application Service or Isolation Segment.
  • Isolation Segment
    • 2.7.x versions prior to 2.7.29
    • 2.8.x versions prior to 2.8.23
    • 2.9.x versions prior to 2.9.17
    • 2.10.x versions prior to 2.10.9
  • Operations Manager
    • 2.7 versions prior to 2.7.26
    • 2.9 versions prior to 2.9.14
    • 2.10 versions prior to 2.10.4
  • VMware Tanzu Application Service for VMs
    • 2.7.x versions prior to 2.7.30
    • 2.8.x versions prior to 2.8.24
    • 2.9.x versions prior to 2.9.18
    • 2.10.x versions prior to 2.10.10

Mitigation

Users of affected products are strongly encouraged to follow the mitigation below. The Cloud Foundry security team recommends upgrading the affected OSS components listed here if applicable. Upgrade VMware Tanzu products that use earlier versions of CF components to new Tanzu releases using new versions linked above. On the Tanzu Network product page for each release, check the Depends On section and/or Release Notes for this information. Releases that have fixed this issue include:
  • Isolation Segment
    • 2.7.29
    • 2.8.23
    • 2.9.17
    • 2.10.9
  • Operations Manager
    • 2.7.26
    • 2.9.14
    • 2.10.4
  • VMware Tanzu Application Service for VMs
    • 2.7.30
    • 2.8.24
    • 2.9.18
    • 2.10.10

References

History

2021-01-13: Initial vulnerability report published.