USN-4345-1: Linux kernel vulnerabilities

28 April 2020

linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS

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-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
  • linux-kvm - Linux kernel for cloud environments
  • linux-oem - Linux kernel for OEM processors
  • linux-oracle - Linux kernel for Oracle Cloud systems
  • linux-raspi2 - Linux kernel for Raspberry Pi 2
  • linux-snapdragon - Linux kernel for Snapdragon processors
  • linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-hwe - Linux hardware enablement (HWE) kernel

Details

Al Viro discovered that the Linux kernel for s390x systems did not properly perform page table upgrades for kernel sections that use secondary address mode. A local attacker could use this to cause a denial of service (system crash) or execute arbitrary code. (CVE-2020-11884)

It was discovered that the Intel Wi-Fi driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service (system crash). (CVE-2019-16234)

Tristan Madani discovered that the block I/O tracing implementation in the Linux kernel contained a race condition. A local attacker could use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2019-19768)

It was discovered that the vhost net driver in the Linux kernel contained a stack buffer overflow. A local attacker with the ability to perform ioctl() calls on /dev/vhost-net could use this to cause a denial of service (system crash). (CVE-2020-10942)

It was discovered that the OV51x USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11608)

It was discovered that the STV06XX USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11609)

It was discovered that the Xirlink C-It USB Camera device driver in the Linux kernel did not properly validate device metadata. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2020-11668)

It was discovered that the virtual terminal implementation in the Linux kernel contained a race condition. A local attacker could possibly use this to cause a denial of service (system crash) or expose sensitive information. (CVE-2020-8648)

Jordy Zomer discovered that the floppy driver in the Linux kernel did not properly check for errors in some situations. A local attacker could possibly use this to cause a denial of service (system crash) or possibly expose sensitive information. (CVE-2020-9383)

Update instructions

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

Ubuntu 18.04 LTS
linux-image-4.15.0-1038-oracle - 4.15.0-1038.42
linux-image-4.15.0-1058-gke - 4.15.0-1058.61
linux-image-4.15.0-1059-kvm - 4.15.0-1059.60
linux-image-4.15.0-1061-raspi2 - 4.15.0-1061.65
linux-image-4.15.0-1066-aws - 4.15.0-1066.70
linux-image-4.15.0-1077-snapdragon - 4.15.0-1077.84
linux-image-4.15.0-1080-oem - 4.15.0-1080.90
linux-image-4.15.0-99-generic - 4.15.0-99.100
linux-image-4.15.0-99-generic-lpae - 4.15.0-99.100
linux-image-4.15.0-99-lowlatency - 4.15.0-99.100
linux-image-aws-lts-18.04 - 4.15.0.1066.69
linux-image-generic - 4.15.0.99.89
linux-image-generic-lpae - 4.15.0.99.89
linux-image-gke - 4.15.0.1058.62
linux-image-gke-4.15 - 4.15.0.1058.62
linux-image-kvm - 4.15.0.1059.59
linux-image-lowlatency - 4.15.0.99.89
linux-image-oem - 4.15.0.1080.84
linux-image-oracle-lts-18.04 - 4.15.0.1038.47
linux-image-powerpc-e500mc - 4.15.0.99.89
linux-image-powerpc-smp - 4.15.0.99.89
linux-image-powerpc64-emb - 4.15.0.99.89
linux-image-powerpc64-smp - 4.15.0.99.89
linux-image-raspi2 - 4.15.0.1061.59
linux-image-snapdragon - 4.15.0.1077.80
linux-image-virtual - 4.15.0.99.89
Ubuntu 16.04 LTS
linux-image-4.15.0-1038-oracle - 4.15.0-1038.42~16.04.1
linux-image-4.15.0-1061-gcp - 4.15.0-1061.65
linux-image-4.15.0-1066-aws - 4.15.0-1066.70~16.04.1
linux-image-4.15.0-1082-azure - 4.15.0-1082.92~16.04.1
linux-image-4.15.0-99-generic - 4.15.0-99.100~16.04.1
linux-image-4.15.0-99-generic-lpae - 4.15.0-99.100~16.04.1
linux-image-4.15.0-99-lowlatency - 4.15.0-99.100~16.04.1
linux-image-aws-hwe - 4.15.0.1066.66
linux-image-azure - 4.15.0.1082.81
linux-image-azure-edge - 4.15.0.1082.81
linux-image-gcp - 4.15.0.1061.75
linux-image-generic-hwe-16.04 - 4.15.0.99.106
linux-image-generic-lpae-hwe-16.04 - 4.15.0.99.106
linux-image-gke - 4.15.0.1061.75
linux-image-lowlatency-hwe-16.04 - 4.15.0.99.106
linux-image-oem - 4.15.0.99.106
linux-image-oracle - 4.15.0.1038.31
linux-image-virtual-hwe-16.04 - 4.15.0.99.106

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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.

References