Ubuntu: USN-5268-1 Critical: Kernel DoS and Bluetooth Flaws

ubuntu

February 3, 2022

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-dell300x: Linux kernel for Dell 300x platforms

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi2: Linux kernel for Raspberry Pi systems

- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-hwe: Linux hardware enablement (HWE) kernel

Details:

Keyu Man discovered that the ICMP implementation in the Linux kernel did

not properly handle received ICMP error packets. A remote attacker could

use this to facilitate attacks on UDP based services that depend on source

port randomization. (CVE-2021-20322)

It was discovered that th...

Read the Full Advisory

Topics Covered

security advisory critical doS kernel ubuntu linux bluetooth

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1034-dell300x  4.15.0-1034.39
  linux-image-4.15.0-1086-oracle  4.15.0-1086.94
  linux-image-4.15.0-1102-raspi2  4.15.0-1102.109
  linux-image-4.15.0-1106-kvm     4.15.0-1106.108
  linux-image-4.15.0-1115-gcp     4.15.0-1115.129
  linux-image-4.15.0-1119-snapdragon  4.15.0-1119.128
  linux-image-4.15.0-167-generic  4.15.0-167.175
  linux-image-4.15.0-167-generic-lpae  4.15.0-167.175
  linux-image-4.15.0-167-lowlatency  4.15.0-167.175
  linux-image-aws-lts-18.04       4.15.0.1119.122
  linux-image-dell300x            4.15.0.1034.36
  linux-image-gcp-lts-18.04       4.15.0.1115.134
  linux-image-generic             4.15.0.167.156
  linux-image-generic-lpae        4.15.0.167.156
  linux-image-kvm                 4.15.0.1106.102
  linux-image-lowlatency          4.15.0.167.156
  linux-image-oracle-lts-18.04    4.15.0.1086.96
  linux-image-raspi2              4.15.0.1102.100
  linux-image-snapdragon          4.15.0.1119.122
  linux-image-virtual             4.15.0.167.156

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1086-oracle  4.15.0-1086.94~16.04.1
  linux-image-4.15.0-1130-azure   4.15.0-1130.143~16.04.1
  linux-image-4.15.0-167-generic  4.15.0-167.175~16.04.1
  linux-image-4.15.0-167-lowlatency  4.15.0-167.175~16.04.1
  linux-image-aws-hwe             4.15.0.1119.110
  linux-image-azure               4.15.0.1130.121
  linux-image-generic-hwe-16.04   4.15.0.167.159
  linux-image-lowlatency-hwe-16.04  4.15.0.167.159
  linux-image-lowlatency-hwe-16.04-edge  4.15.0.167.159
  linux-image-oem                 4.15.0.167.159
  linux-image-oracle              4.15.0.1086.74
  linux-image-virtual-hwe-16.04   4.15.0.167.159

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1130-azure   4.15.0-1130.143~14.04.1
  linux-image-azure               4.15.0.1130.103

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

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.