USN-3820-1: Linux kernel vulnerabilities

14 November 2018

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • 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-oem - Linux kernel for OEM processors
  • linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

Felix Wilhelm discovered that the Xen netback driver in the Linux kernel
did not properly perform input validation in some situations. An attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2018-15471)

It was discovered that the generic SCSI driver in the Linux kernel did not
properly enforce permissions on kernel memory access. A local attacker
could use this to expose sensitive information or possibly elevate
privileges. (CVE-2017-13168)

It was discovered that an integer overflow existed in the CD-ROM driver of
the Linux kernel. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2018-16658)

It was discovered that an integer overflow existed in the HID Bluetooth
implementation in the Linux kernel that could lead to a buffer overwrite.
An attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2018-9363)

Update instructions

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

Ubuntu 18.04

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.

Related notices

  • USN-3820-2: linux-azure, linux-image-4.15.0-39-lowlatency, linux-image-unsigned-4.15.0-39-lowlatency, linux-image-4.15.0-39-generic-lpae, linux-image-4.15.0-39-generic, linux-gcp, linux-image-unsigned-4.15.0-1024-gcp, linux-image-unsigned-4.15.0-1031-azure, linux-image-unsigned-4.15.0-39-generic, linux-hwe
  • USN-3753-2: linux-image-4.4.0-134-generic, linux-image-4.4.0-134-powerpc-smp, linux-image-4.4.0-134-powerpc64-emb, linux-image-4.4.0-134-lowlatency, linux-lts-xenial, linux-image-4.4.0-134-powerpc-e500mc, linux-image-4.4.0-1028-aws, linux-image-4.4.0-134-powerpc64-smp, linux-aws, linux-image-4.4.0-134-generic-lpae, linux-image-extra-4.4.0-134-generic
  • USN-3797-1: linux-image-4.4.0-138-powerpc-smp, linux-image-extra-4.4.0-138-generic, linux-snapdragon, linux-image-4.4.0-138-powerpc-e500mc, linux-image-4.4.0-138-powerpc64-emb, linux-image-4.4.0-1099-raspi2, linux-image-4.4.0-1070-aws, linux-image-4.4.0-138-powerpc64-smp, linux-kvm, linux-raspi2, linux-aws, linux, linux-image-4.4.0-138-generic, linux-image-4.4.0-1103-snapdragon, linux-image-4.4.0-138-lowlatency, linux-image-4.4.0-138-generic-lpae, linux-image-4.4.0-1036-kvm
  • USN-3822-2: linux-image-3.13.0-162-generic, linux-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-162-generic-lpae
  • USN-3819-1: linux-image-generic, linux-image-4.18.0-11-snapdragon, linux-image-4.18.0-11-lowlatency, linux-image-4.18.0-1004-kvm, linux-image-generic-lpae, linux-image-4.18.0-1003-gcp, linux-image-raspi2, linux-aws, linux, linux-image-gcp, linux-image-aws, linux-image-4.18.0-1004-aws, linux-image-4.18.0-11-generic-lpae, linux-image-kvm, linux-image-4.18.0-1006-raspi2, linux-image-lowlatency, linux-gcp, linux-raspi2, linux-image-snapdragon, linux-image-4.18.0-11-generic, linux-kvm, linux-image-gke
  • USN-3820-3: linux-azure, linux-image-unsigned-4.15.0-1031-azure
  • USN-3822-1: linux-image-3.13.0-162-generic, linux-image-3.13.0-162-lowlatency, linux-image-3.13.0-162-powerpc-smp, linux-image-3.13.0-162-powerpc64-smp, linux-image-extra-3.13.0-162-generic, linux-image-3.13.0-162-powerpc-e500, linux, linux-image-3.13.0-162-powerpc-e500mc, linux-image-3.13.0-162-generic-lpae, linux-image-3.13.0-162-powerpc64-emb
  • USN-3753-1: linux-image-4.4.0-134-generic, linux-image-4.4.0-134-powerpc-smp, linux-image-4.4.0-1032-kvm, linux-snapdragon, linux-image-4.4.0-134-powerpc64-emb, linux-image-4.4.0-134-lowlatency, linux-image-4.4.0-1095-raspi2, linux-image-4.4.0-134-powerpc-e500mc, linux-image-4.4.0-1099-snapdragon, linux-kvm, linux-image-4.4.0-1066-aws, linux-image-4.4.0-134-powerpc64-smp, linux-aws, linux, linux-raspi2, linux-image-4.4.0-134-generic-lpae, linux-image-extra-4.4.0-134-generic
  • USN-3797-2: linux-image-4.4.0-138-powerpc-smp, linux-image-extra-4.4.0-138-generic, linux-image-4.4.0-1032-aws, linux-image-4.4.0-138-powerpc-e500mc, linux-image-4.4.0-138-powerpc64-emb, linux-lts-xenial, linux-image-4.4.0-138-generic, linux-aws, linux-image-4.4.0-138-lowlatency, linux-image-4.4.0-138-generic-lpae, linux-image-4.4.0-138-powerpc64-smp