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Ubuntu: (Multiple Advisories) (CVE-2021-28711): Linux kernel (BlueField) vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2021-28711): Linux kernel (BlueField) vulnerabilities

Severity
2
CVSS
(AV:L/AC:L/Au:N/C:N/I:N/A:P)
Published
01/05/2022
Created
03/24/2022
Added
02/23/2022
Modified
04/21/2022

Description

Rogue backends can cause DoS of guests via high frequency events T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Xen offers the ability to run PV backends in regular unprivileged guests, typically referred to as "driver domains". Running PV backends in driver domains has one primary security advantage: if a driver domain gets compromised, it doesn't have the privileges to take over the system. However, a malicious driver domain could try to attack other guests via sending events at a high frequency leading to a Denial of Service in the guest due to trying to service interrupts for elongated amounts of time. There are three affected backends: * blkfront patch 1, CVE-2021-28711 * netfront patch 2, CVE-2021-28712 * hvc_xen (console) patch 3, CVE-2021-28713

Solution(s)

  • ubuntu-upgrade-linux-image-4-15-0-1035-dell300x
  • ubuntu-upgrade-linux-image-4-15-0-1087-oracle
  • ubuntu-upgrade-linux-image-4-15-0-1103-raspi2
  • ubuntu-upgrade-linux-image-4-15-0-1107-kvm
  • ubuntu-upgrade-linux-image-4-15-0-1116-gcp
  • ubuntu-upgrade-linux-image-4-15-0-1120-snapdragon
  • ubuntu-upgrade-linux-image-4-15-0-1131-azure
  • ubuntu-upgrade-linux-image-4-15-0-169-generic
  • ubuntu-upgrade-linux-image-4-15-0-169-generic-lpae
  • ubuntu-upgrade-linux-image-4-15-0-169-lowlatency
  • ubuntu-upgrade-linux-image-5-13-0-1018-kvm
  • ubuntu-upgrade-linux-image-5-13-0-1019-aws
  • ubuntu-upgrade-linux-image-5-13-0-1021-azure
  • ubuntu-upgrade-linux-image-5-13-0-1021-gcp
  • ubuntu-upgrade-linux-image-5-13-0-1022-raspi
  • ubuntu-upgrade-linux-image-5-13-0-1022-raspi-nolpae
  • ubuntu-upgrade-linux-image-5-13-0-1023-oracle
  • ubuntu-upgrade-linux-image-5-13-0-1025-oracle
  • ubuntu-upgrade-linux-image-5-13-0-37-generic
  • ubuntu-upgrade-linux-image-5-13-0-37-generic-64k
  • ubuntu-upgrade-linux-image-5-13-0-37-generic-lpae
  • ubuntu-upgrade-linux-image-5-13-0-37-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1018-ibm
  • ubuntu-upgrade-linux-image-5-4-0-1032-bluefield
  • ubuntu-upgrade-linux-image-5-4-0-1037-gkeop
  • ubuntu-upgrade-linux-image-5-4-0-105-generic
  • ubuntu-upgrade-linux-image-5-4-0-105-generic-lpae
  • ubuntu-upgrade-linux-image-5-4-0-105-lowlatency
  • ubuntu-upgrade-linux-image-5-4-0-1056-raspi
  • ubuntu-upgrade-linux-image-5-4-0-1059-kvm
  • ubuntu-upgrade-linux-image-5-4-0-1066-gke
  • ubuntu-upgrade-linux-image-5-4-0-1067-oracle
  • ubuntu-upgrade-linux-image-5-4-0-1068-gcp
  • ubuntu-upgrade-linux-image-5-4-0-1069-aws
  • ubuntu-upgrade-linux-image-5-4-0-1073-azure
  • ubuntu-upgrade-linux-image-5-4-0-1073-azure-fde
  • 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-fde
  • ubuntu-upgrade-linux-image-azure-lts-18-04
  • ubuntu-upgrade-linux-image-azure-lts-20-04
  • ubuntu-upgrade-linux-image-bluefield
  • ubuntu-upgrade-linux-image-dell300x
  • 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-ibm
  • ubuntu-upgrade-linux-image-ibm-lts-20-04
  • 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-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

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