USN-3822-1: Linux kernel vulnerabilities

14 November 2018

linux vulnerabilities

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

  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software Description

  • linux - Linux kernel

Details

Jim Mattson discovered that the KVM implementation in the Linux kernel mismanages the #BP and #OF exceptions. A local attacker in a guest virtual machine could use this to cause a denial of service (guest OS crash). (CVE-2016-9588)

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)

Andrey Konovalov discovered that the CDC USB Ethernet driver did not properly validate device descriptors. A physically proximate attacker could use this to cause a denial of service (system crash). (CVE-2017-16649)

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 14.04 LTS
linux-image-3.13.0-162-generic - 3.13.0-162.212
linux-image-3.13.0-162-generic-lpae - 3.13.0-162.212
linux-image-3.13.0-162-lowlatency - 3.13.0-162.212
linux-image-3.13.0-162-powerpc-e500 - 3.13.0-162.212
linux-image-3.13.0-162-powerpc-e500mc - 3.13.0-162.212
linux-image-3.13.0-162-powerpc-smp - 3.13.0-162.212
linux-image-3.13.0-162-powerpc64-emb - 3.13.0-162.212
linux-image-3.13.0-162-powerpc64-smp - 3.13.0-162.212
linux-image-generic - 3.13.0.162.172
linux-image-generic-lpae - 3.13.0.162.172
linux-image-lowlatency - 3.13.0.162.172
linux-image-powerpc-e500 - 3.13.0.162.172
linux-image-powerpc-e500mc - 3.13.0.162.172
linux-image-powerpc-smp - 3.13.0.162.172
linux-image-powerpc64-emb - 3.13.0.162.172
linux-image-powerpc64-smp - 3.13.0.162.172

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