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Ubuntu: (Multiple Advisories) (CVE-2020-27777): Linux kernel vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2020-27777): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
12/08/2020
Created
01/08/2021
Added
01/06/2021
Modified
03/22/2023

Description

A flaw was found in the way RTAS handled memory accesses in userspace to kernel communication. On a locked down (usually due to Secure Boot) guest system running on top of PowerVM or KVM hypervisors (pseries platform) a root like local user could use this flaw to further increase their privileges to that of a running kernel.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1062-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1077-gke
  • ubuntu-upgrade-linux-image-4-15-0-1077-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1082-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1091-aws
  • ubuntu-upgrade-linux-image-4-15-0-1091-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1094-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1103-azure
  • ubuntu-upgrade-linux-image-4-15-0-129-generic
  • ubuntu-upgrade-linux-image-4-15-0-129-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-129-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-201-generic
  • ubuntu-upgrade-linux-image-4-4-0-201-generic-lpae
  • ubuntu-upgrade-linux-image-4-4-0-201-lowlatency
  • ubuntu-upgrade-linux-image-4-4-0-201-powerpc-e500mc
  • ubuntu-upgrade-linux-image-4-4-0-201-powerpc-smp
  • ubuntu-upgrade-linux-image-4-4-0-201-powerpc64-emb
  • ubuntu-upgrade-linux-image-4-4-0-201-powerpc64-smp
  • ubuntu-upgrade-linux-image-5-4-0-1026-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1031-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1033-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1033-gke
  • ubuntu-upgrade-linux-image-5-4-0-1034-aws
  • ubuntu-upgrade-linux-image-5-4-0-1034-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1035-azure
  • ubuntu-upgrade-linux-image-5-4-0-59-generic
  • ubuntu-upgrade-linux-image-5-4-0-59-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-59-lowlatency
  • ubuntu-upgrade-linux-image-5-8-0-1016-raspi
  • ubuntu-upgrade-linux-image-5-8-0-1016-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-8-0-1019-kvm
  • ubuntu-upgrade-linux-image-5-8-0-1021-oracle
  • ubuntu-upgrade-linux-image-5-8-0-1023-azure
  • ubuntu-upgrade-linux-image-5-8-0-1023-gcp
  • ubuntu-upgrade-linux-image-5-8-0-1024-aws
  • ubuntu-upgrade-linux-image-5-8-0-44-generic
  • ubuntu-upgrade-linux-image-5-8-0-44-generic-64k
  • ubuntu-upgrade-linux-image-5-8-0-44-generic-lpae
  • ubuntu-upgrade-linux-image-5-8-0-44-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • ubuntu-upgrade-linux-image-generic
  • ubuntu-upgrade-linux-image-generic-64k
  • ubuntu-upgrade-linux-image-generic-64k-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-16-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-18-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-generic-lpae-lts-xenial
  • ubuntu-upgrade-linux-image-generic-lts-xenial
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-4-15
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-kvm
  • ubuntu-upgrade-linux-image-lowlatency
  • ubuntu-upgrade-linux-image-lowlatency-hwe-16-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-18-04
  • ubuntu-upgrade-linux-image-lowlatency-hwe-20-04
  • ubuntu-upgrade-linux-image-lowlatency-lts-xenial
  • ubuntu-upgrade-linux-image-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • ubuntu-upgrade-linux-image-powerpc-e500mc
  • ubuntu-upgrade-linux-image-powerpc-e500mc-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc-smp
  • ubuntu-upgrade-linux-image-powerpc-smp-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-emb
  • ubuntu-upgrade-linux-image-powerpc64-emb-lts-xenial
  • ubuntu-upgrade-linux-image-powerpc64-smp
  • ubuntu-upgrade-linux-image-powerpc64-smp-lts-xenial
  • ubuntu-upgrade-linux-image-raspi
  • ubuntu-upgrade-linux-image-raspi-hwe-18-04
  • ubuntu-upgrade-linux-image-raspi-nolpae
  • ubuntu-upgrade-linux-image-raspi2
  • ubuntu-upgrade-linux-image-snapdragon
  • ubuntu-upgrade-linux-image-snapdragon-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual
  • ubuntu-upgrade-linux-image-virtual-hwe-16-04
  • ubuntu-upgrade-linux-image-virtual-hwe-18-04
  • ubuntu-upgrade-linux-image-virtual-hwe-20-04
  • ubuntu-upgrade-linux-image-virtual-lts-xenial

References

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