1. Ubuntu Security Notices
  2. USN-4114-1

USN-4114-1: Linux kernel vulnerabilities

Publication date

2 September 2019

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux - Linux kernel
  • linux-azure - Linux kernel for Microsoft Azure Cloud systems
  • linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
  • linux-gke-5.0 - Linux kernel for Google Container Engine (GKE) systems
  • linux-hwe - Linux hardware enablement (HWE) kernel
  • linux-kvm - Linux kernel for cloud environments
  • linux-raspi2 - Linux kernel for Raspberry Pi 2
  • linux-snapdragon - Linux kernel for Snapdragon processors

Details

Amit Klein and Benny Pinkas discovered that the Linux kernel did not
sufficiently randomize IP ID values generated for connectionless networking
protocols. A remote attacker could use this to track particular Linux
devices. (CVE-2019-10638)

Praveen Pandey discovered that the Linux kernel did not properly validate
sent signals in some situations on PowerPC systems with transactional
memory disabled. A local attacker could use this to cause a denial of
service. (CVE-2019-13648)

It was discovered that the floppy driver in the Linux kernel did not
properly validate meta data, leading to a buffer overread. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2019-14283)

It was discovered that the floppy driver in the Linux kernel did not
properly validate ioctl() calls, leading to...

Amit Klein and Benny Pinkas discovered that the Linux kernel did not
sufficiently randomize IP ID values generated for connectionless networking
protocols. A remote attacker could use this to track particular Linux
devices. (CVE-2019-10638)

Praveen Pandey discovered that the Linux kernel did not properly validate
sent signals in some situations on PowerPC systems with transactional
memory disabled. A local attacker could use this to cause a denial of
service. (CVE-2019-13648)

It was discovered that the floppy driver in the Linux kernel did not
properly validate meta data, leading to a buffer overread. A local attacker
could use this to cause a denial of service (system crash).
(CVE-2019-14283)

It was discovered that the floppy driver in the Linux kernel did not
properly validate ioctl() calls, leading to a division-by-zero. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2019-14284)

Jason Wang discovered that an infinite loop vulnerability existed in the
virtio net driver in the Linux kernel. A local attacker in a guest VM could
possibly use this to cause a denial of service in the host system.
(CVE-2019-3900)

Update instructions

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

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
19.04 disco linux-image-5.0.0-1015-gcp –  5.0.0-1015.15
linux-image-5.0.0-1015-kvm –  5.0.0-1015.16
linux-image-5.0.0-1015-raspi2 –  5.0.0-1015.15
linux-image-5.0.0-1018-azure –  5.0.0-1018.19
linux-image-5.0.0-1019-snapdragon –  5.0.0-1019.20
linux-image-5.0.0-27-generic –  5.0.0-27.28
linux-image-5.0.0-27-generic-lpae –  5.0.0-27.28
linux-image-5.0.0-27-lowlatency –  5.0.0-27.28
linux-image-azure –  5.0.0.1018.17
linux-image-gcp –  5.0.0.1015.41
linux-image-generic –  5.0.0.27.28
linux-image-generic-lpae –  5.0.0.27.28
linux-image-gke –  5.0.0.1015.41
linux-image-kvm –  5.0.0.1015.15
linux-image-lowlatency –  5.0.0.27.28
linux-image-raspi2 –  5.0.0.1015.12
linux-image-snapdragon –  5.0.0.1019.12
linux-image-virtual –  5.0.0.27.28
18.04 bionic linux-image-5.0.0-1015-gke –  5.0.0-1015.15~18.04.1
linux-image-5.0.0-1018-azure –  5.0.0-1018.19~18.04.1
linux-image-5.0.0-27-generic –  5.0.0-27.28~18.04.1
linux-image-5.0.0-27-generic-lpae –  5.0.0-27.28~18.04.1
linux-image-5.0.0-27-lowlatency –  5.0.0-27.28~18.04.1
linux-image-azure –  5.0.0.1018.28
linux-image-generic-hwe-18.04 –  5.0.0.27.84
linux-image-generic-lpae-hwe-18.04 –  5.0.0.27.84
linux-image-gke-5.0 –  5.0.0.1015.5
linux-image-lowlatency-hwe-18.04 –  5.0.0.27.84
linux-image-snapdragon-hwe-18.04 –  5.0.0.27.84
linux-image-virtual-hwe-18.04 –  5.0.0.27.84

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References

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