Ubuntu 16.04 LTS: USN-3797-1 Major: Linux Kernel DoS Issues

ubuntu

October 23, 2018

Several security issues were fixed in the Linux kernel.

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-kvm: Linux kernel for cloud environments

- linux-raspi2: Linux kernel for Raspberry Pi 2

- linux-snapdragon: Linux kernel for Snapdragon processors

Details:

Noam Rathaus discovered that a use-after-free vulnerability existed in the

Infiniband implementation in the Linux kernel. An attacker could use this

to cause a denial of service (system crash). (CVE-2018-14734)

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-201...

Read the Full Advisory

Topics Covered

security advisory denial of service system update ubuntu security issues linux kernel

Update Instructions

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

Ubuntu 16.04 LTS:
  linux-image-4.4.0-1036-kvm      4.4.0-1036.42
  linux-image-4.4.0-1070-aws      4.4.0-1070.80
  linux-image-4.4.0-1099-raspi2   4.4.0-1099.107
  linux-image-4.4.0-1103-snapdragon  4.4.0-1103.108
  linux-image-4.4.0-138-generic   4.4.0-138.164
  linux-image-4.4.0-138-generic-lpae  4.4.0-138.164
  linux-image-4.4.0-138-lowlatency  4.4.0-138.164
  linux-image-4.4.0-138-powerpc-e500mc  4.4.0-138.164
  linux-image-4.4.0-138-powerpc-smp  4.4.0-138.164
  linux-image-4.4.0-138-powerpc64-emb  4.4.0-138.164
  linux-image-4.4.0-138-powerpc64-smp  4.4.0-138.164
  linux-image-aws                 4.4.0.1070.72
  linux-image-generic             4.4.0.138.144
  linux-image-generic-lpae        4.4.0.138.144
  linux-image-kvm                 4.4.0.1036.35
  linux-image-lowlatency          4.4.0.138.144
  linux-image-powerpc-e500mc      4.4.0.138.144
  linux-image-powerpc-smp         4.4.0.138.144
  linux-image-powerpc64-emb       4.4.0.138.144
  linux-image-powerpc64-smp       4.4.0.138.144
  linux-image-raspi2              4.4.0.1099.99
  linux-image-snapdragon          4.4.0.1103.95

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.