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Ubuntu: (Multiple Advisories) (CVE-2021-33200): Linux kernel (OEM) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-33200): Linux kernel (OEM) vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
05/27/2021
Created
06/07/2021
Added
06/04/2021
Modified
03/22/2023

Description

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1078-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1092-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1097-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1106-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1109-aws
  • ubuntu-upgrade-linux-image-4-15-0-1109-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1121-azure
  • ubuntu-upgrade-linux-image-4-15-0-151-generic
  • ubuntu-upgrade-linux-image-4-15-0-151-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-151-lowlatency
  • ubuntu-upgrade-linux-image-5-10-0-1029-oem
  • ubuntu-upgrade-linux-image-5-11-0-1009-azure
  • ubuntu-upgrade-linux-image-5-11-0-1009-kvm
  • ubuntu-upgrade-linux-image-5-11-0-1010-oracle
  • ubuntu-upgrade-linux-image-5-11-0-1011-aws
  • ubuntu-upgrade-linux-image-5-11-0-1011-gcp
  • ubuntu-upgrade-linux-image-5-11-0-1012-raspi
  • ubuntu-upgrade-linux-image-5-11-0-1012-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-11-0-22-generic
  • ubuntu-upgrade-linux-image-5-11-0-22-generic-64k
  • ubuntu-upgrade-linux-image-5-11-0-22-generic-lpae
  • ubuntu-upgrade-linux-image-5-11-0-22-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1018-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-1038-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1041-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1046-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1046-gke
  • ubuntu-upgrade-linux-image-5-4-0-1048-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1051-aws
  • ubuntu-upgrade-linux-image-5-4-0-1051-azure
  • ubuntu-upgrade-linux-image-5-4-0-77-generic
  • ubuntu-upgrade-linux-image-5-4-0-77-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-77-lowlatency
  • ubuntu-upgrade-linux-image-5-8-0-1029-raspi
  • ubuntu-upgrade-linux-image-5-8-0-1029-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-8-0-1030-kvm
  • ubuntu-upgrade-linux-image-5-8-0-1033-oracle
  • ubuntu-upgrade-linux-image-5-8-0-1035-gcp
  • ubuntu-upgrade-linux-image-5-8-0-1036-azure
  • ubuntu-upgrade-linux-image-5-8-0-1038-aws
  • ubuntu-upgrade-linux-image-5-8-0-59-generic
  • ubuntu-upgrade-linux-image-5-8-0-59-generic-64k
  • ubuntu-upgrade-linux-image-5-8-0-59-generic-lpae
  • ubuntu-upgrade-linux-image-5-8-0-59-lowlatency
  • ubuntu-upgrade-linux-image-aws
  • ubuntu-upgrade-linux-image-aws-hwe
  • ubuntu-upgrade-linux-image-aws-lts-18-04
  • ubuntu-upgrade-linux-image-aws-lts-20-04
  • ubuntu-upgrade-linux-image-azure
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-gcp
  • ubuntu-upgrade-linux-image-gcp-lts-18-04
  • ubuntu-upgrade-linux-image-gcp-lts-20-04
  • 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-18-04
  • ubuntu-upgrade-linux-image-generic-lpae-hwe-20-04
  • ubuntu-upgrade-linux-image-gke
  • ubuntu-upgrade-linux-image-gke-5-4
  • ubuntu-upgrade-linux-image-gkeop
  • ubuntu-upgrade-linux-image-gkeop-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-oem
  • ubuntu-upgrade-linux-image-oem-20-04
  • ubuntu-upgrade-linux-image-oem-20-04b
  • ubuntu-upgrade-linux-image-oem-osp1
  • ubuntu-upgrade-linux-image-oracle
  • ubuntu-upgrade-linux-image-oracle-lts-18-04
  • ubuntu-upgrade-linux-image-oracle-lts-20-04
  • 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

References

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