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USN-3364-3: Linux kernel (AWS, GKE) vulnerabilities

25 July 2017

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-aws - Linux kernel for Amazon Web Services (AWS) systems
  • linux-gke - Linux kernel for Google Container Engine (GKE) systems

Details

It was discovered that the Linux kernel did not properly initialize a Wake-
on-Lan data structure. A local attacker could use this to expose sensitive
information (kernel memory). (CVE-2014-9900)

It was discovered that the Linux kernel did not properly restrict access to
/proc/iomem. A local attacker could use this to expose sensitive
information. (CVE-2015-8944)

Alexander Potapenko discovered a race condition in the Advanced Linux Sound
Architecture (ALSA) subsystem in the Linux kernel. A local attacker could
use this to expose sensitive information (kernel memory).
(CVE-2017-1000380)

Li Qiang discovered that the DRM driver for VMware Virtual GPUs in the
Linux kernel did not properly validate some ioctl arguments. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2017-7346)

Jann Horn discovered that bpf in Linux kernel does not restrict the output
of the print_bpf_insn function. A local attacker could use this to obtain
sensitive address information. (CVE-2017-9150)

Murray McAllister discovered that the DRM driver for VMware Virtual GPUs in
the Linux kernel did not properly initialize memory. A local attacker could
use this to expose sensitive information (kernel memory). (CVE-2017-9605)

Update instructions

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

Ubuntu 16.04

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-3360-1: linux-image-3.13.0-125-powerpc-e500mc, linux-image-3.13.0-125-generic, linux-image-3.13.0-125-powerpc-smp, linux-image-3.13.0-125-lowlatency, linux-image-3.13.0-125-powerpc64-emb, linux, linux-image-3.13.0-125-generic-lpae, linux-image-3.13.0-125-powerpc-e500, linux-image-3.13.0-125-powerpc64-smp, linux-image-extra-3.13.0-125-generic
  • USN-3359-1: linux-image-powerpc64-emb, linux-image-4.8.0-59-generic-lpae, linux-image-4.8.0-59-powerpc64-emb, linux-image-lowlatency, linux-image-generic, linux-image-raspi2, linux, linux-raspi2, linux-image-4.8.0-59-powerpc-e500mc, linux-image-4.8.0-1043-raspi2, linux-image-generic-lpae, linux-image-4.8.0-59-lowlatency, linux-image-4.8.0-59-powerpc-smp, linux-image-powerpc-smp, linux-image-4.8.0-59-generic, linux-image-powerpc-e500mc
  • USN-3364-1: linux-image-4.4.0-87-lowlatency, linux-image-4.4.0-87-powerpc64-emb, linux-snapdragon, linux, linux-image-4.4.0-1067-snapdragon, linux-image-4.4.0-87-powerpc-e500mc, linux-raspi2, linux-image-4.4.0-87-generic-lpae, linux-image-4.4.0-87-powerpc64-smp, linux-image-extra-4.4.0-87-generic, linux-image-4.4.0-1065-raspi2, linux-image-4.4.0-87-generic, linux-image-4.4.0-87-powerpc-smp
  • USN-3345-1: linux-image-lowlatency, linux-image-generic, linux-image-raspi2, linux-image-4.10.0-26-generic-lpae, linux, linux-raspi2, linux-image-generic-lpae, linux-image-4.10.0-26-lowlatency, linux-image-4.10.0-1010-raspi2, linux-image-4.10.0-26-generic
  • USN-3371-1: linux-image-4.10.0-28-generic-lpae, linux-hwe, linux-image-4.10.0-28-generic, linux-image-4.10.0-28-lowlatency, linux-image-extra-4.10.0-28-generic
  • USN-3364-2: linux-lts-xenial, linux-image-4.4.0-87-lowlatency, linux-image-4.4.0-87-powerpc64-emb, linux-image-4.4.0-87-powerpc-e500mc, linux-image-4.4.0-87-generic-lpae, linux-image-4.4.0-87-powerpc64-smp, linux-image-extra-4.4.0-87-generic, linux-image-4.4.0-87-generic, linux-image-4.4.0-87-powerpc-smp
  • USN-3358-1: linux-image-lowlatency, linux-image-4.10.0-28-generic-lpae, linux-image-generic, linux-image-raspi2, linux-image-4.10.0-28-generic, linux, linux-raspi2, linux-image-4.10.0-28-lowlatency, linux-image-generic-lpae, linux-image-4.10.0-1011-raspi2
  • USN-3360-2: linux-lts-trusty, linux-image-3.13.0-125-generic, linux-image-3.13.0-125-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-image-generic-lts-trusty
  • USN-3361-1: linux-image-extra-4.10.0-27-generic, linux-image-4.10.0-27-lowlatency, linux-image-4.10.0-27-generic-lpae, linux-hwe, linux-image-4.10.0-27-generic