USN-3820-1: Linux kernel vulnerabilities

Releases

• Ubuntu 18.04 ESM

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

• linux-image-4.15.0-1026-kvm - 4.15.0-1026.26
• linux-image-4.15.0-1027-aws - 4.15.0-1027.27
• linux-image-4.15.0-1028-raspi2 - 4.15.0-1028.30
• linux-image-4.15.0-39-generic - 4.15.0-39.42
• linux-image-4.15.0-39-generic-lpae - 4.15.0-39.42
• linux-image-4.15.0-39-lowlatency - 4.15.0-39.42
• linux-image-4.15.0-39-snapdragon - 4.15.0-39.42

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

• CVE-2017-13168
• CVE-2018-15471
• CVE-2018-16658
• CVE-2018-9363

Related notices

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