Ubuntu 4313-1: Moderate Risk Kernel Issue Exposing Data

ubuntu

March 30, 2020

The system could be made to expose sensitive information or run programs as an administrator.

Summary

The system could be made to expose sensitive information or run

programs as an administrator.

Software Description:

- linux: Linux kernel

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

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

- linux-gcp: 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 2

- linux-azure-5.3: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems

- linux-gke-5.3: Linux kernel for Google Container Engine (GKE) systems

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

- linux-oracle-5.3: Linux kernel buildinfo for version 5.3.0 on 64 bit x86 SMP

- linux-raspi2-5.3: Linux kernel for Raspberry Pi 2

Details:

Manfred Paul discovered that the bpf verifier in the Linux kernel did not

properly calculate register bounds for...

Read the Full Advisory

Topics Covered

security advisory software update kernel local attack ubuntu sensitive information administrative privileges

Update Instructions

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

Ubuntu 19.10:
  linux-image-5.3.0-1013-oracle   5.3.0-1013.14
  linux-image-5.3.0-1014-kvm      5.3.0-1014.15
  linux-image-5.3.0-1015-aws      5.3.0-1015.16
  linux-image-5.3.0-1016-gcp      5.3.0-1016.17
  linux-image-5.3.0-1018-azure    5.3.0-1018.19
  linux-image-5.3.0-1021-raspi2   5.3.0-1021.23
  linux-image-5.3.0-45-generic    5.3.0-45.37
  linux-image-5.3.0-45-generic-lpae  5.3.0-45.37
  linux-image-5.3.0-45-lowlatency  5.3.0-45.37
  linux-image-5.3.0-45-snapdragon  5.3.0-45.37
  linux-image-aws                 5.3.0.1015.17
  linux-image-azure               5.3.0.1018.37
  linux-image-gcp                 5.3.0.1016.17
  linux-image-generic             5.3.0.45.38
  linux-image-generic-lpae        5.3.0.45.38
  linux-image-gke                 5.3.0.1016.17
  linux-image-kvm                 5.3.0.1014.16
  linux-image-lowlatency          5.3.0.45.38
  linux-image-oracle              5.3.0.1013.14
  linux-image-raspi2              5.3.0.1021.18
  linux-image-snapdragon          5.3.0.45.38
  linux-image-virtual             5.3.0.45.38

Ubuntu 18.04 LTS:
  linux-image-5.3.0-1013-oracle   5.3.0-1013.14~18.04.1
  linux-image-5.3.0-1016-gcp      5.3.0-1016.17~18.04.1
  linux-image-5.3.0-1016-gke      5.3.0-1016.17~18.04.1
  linux-image-5.3.0-1018-azure    5.3.0-1018.19~18.04.1
  linux-image-5.3.0-1021-raspi2   5.3.0-1021.23~18.04.1
  linux-image-5.3.0-45-generic    5.3.0-45.37~18.04.1
  linux-image-5.3.0-45-generic-lpae  5.3.0-45.37~18.04.1
  linux-image-5.3.0-45-lowlatency  5.3.0-45.37~18.04.1
  linux-image-azure-edge          5.3.0.1018.18
  linux-image-gcp-edge            5.3.0.1016.15
  linux-image-generic-hwe-18.04   5.3.0.45.101
  linux-image-generic-lpae-hwe-18.04  5.3.0.45.101
  linux-image-gke-5.3             5.3.0.1016.6
  linux-image-lowlatency-hwe-18.04  5.3.0.45.101
  linux-image-oracle-edge         5.3.0.1013.12
  linux-image-raspi2-hwe-18.04    5.3.0.1021.10
  linux-image-snapdragon-hwe-18.04  5.3.0.45.101
  linux-image-virtual-hwe-18.04   5.3.0.45.101

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.