USN-3594-1: Linux kernel vulnerability

09 March 2018

The system could be made to expose sensitive information.

Releases

Packages

Details

USN-3542-1 mitigated CVE-2017-5715 (Spectre Variant 2) for the
amd64 architecture in Ubuntu 14.04 LTS. This update provides the
compiler-based retpoline kernel mitigation for the amd64 and i386
architectures. Original advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution
and branch prediction may allow unauthorized memory reads via sidechannel
attacks. This flaw is known as Spectre. A local attacker could use this to
expose sensitive information, including kernel memory. (CVE-2017-5715)

Update instructions

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

Ubuntu 14.04

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-3541-1: linux, linux-image-4.13.0-31-lowlatency, linux-image-generic, linux-image-4.13.0-31-generic, linux-image-lowlatency
  • USN-3597-1: linux, linux-image-4.13.0-37-generic, linux-image-4.13.0-37-lowlatency, linux-raspi2, linux-image-4.13.0-37-generic-lpae, linux-image-raspi2, linux-image-generic, linux-image-generic-lpae, linux-image-lowlatency, linux-image-4.13.0-1015-raspi2
  • USN-3516-1: firefox
  • USN-3531-3: intel-microcode
  • USN-3690-1: amd64-microcode
  • USN-3542-1: linux-image-3.13.0-141-generic, linux, linux-image-generic, linux-image-lowlatency, linux-image-3.13.0-141-lowlatency
  • USN-3540-2: linux-lts-xenial, linux-image-4.4.0-111-lowlatency, linux-image-generic-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-111-powerpc-smp, linux-image-powerpc-smp-lts-xenial, linux-image-4.4.0-111-generic, linux-aws, linux-image-4.4.0-111-powerpc-e500mc, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-aws, linux-image-4.4.0-111-powerpc64-emb, linux-image-4.4.0-111-powerpc64-smp, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-1011-aws
  • USN-3580-1: linux-image-generic-pae, linux, linux-image-3.2.0-133-generic, linux-image-generic, linux-image-3.2.0-133-generic-pae
  • USN-3597-2: linux-image-4.13.0-37-generic, linux-image-4.13.0-37-lowlatency, linux-image-lowlatency-hwe-16.04, linux-image-generic-lpae-hwe-16.04, linux-hwe, linux-image-4.13.0-37-generic-lpae, linux-image-generic-hwe-16.04
  • USN-3531-1: intel-microcode
  • USN-3541-2: linux-azure, linux-image-4.13.0-1006-azure, linux-image-azure, linux-gcp, linux-image-4.13.0-1017-oem, linux-oem, linux-image-lowlatency-hwe-16.04, linux-image-4.13.0-1007-gcp, linux-image-4.13.0-31-lowlatency, linux-hwe, linux-image-gcp, linux-image-generic-hwe-16.04, linux-image-gke, linux-image-oem, linux-image-4.13.0-31-generic
  • USN-3777-3: linux-azure, linux-image-4.15.0-1025-azure, linux-image-azure
  • USN-3561-1: libvirt, libvirt-bin, libvirt0
  • USN-3549-1: linux-image-4.4.0-1017-kvm, linux-kvm, linux-image-kvm
  • USN-3540-1: linux-image-4.4.0-112-generic, linux-image-4.4.0-112-powerpc64-smp, linux-image-4.4.0-112-powerpc-e500mc, linux-image-euclid, linux-image-4.4.0-112-generic-lpae, linux-image-generic-lpae, linux, linux-aws, linux-image-powerpc-smp, linux-image-generic, linux-image-lowlatency, linux-image-powerpc-e500mc, linux-euclid, linux-image-4.4.0-112-powerpc64-emb, linux-image-4.4.0-112-lowlatency, linux-image-4.4.0-112-powerpc-smp, linux-image-aws, linux-image-4.4.0-1049-aws, linux-image-4.4.0-9023-euclid, linux-image-powerpc64-emb, linux-image-powerpc64-smp
  • USN-3582-1: linux-image-4.4.0-116-powerpc64-emb, linux-image-snapdragon, linux-image-generic-lpae, linux-image-kvm, linux-image-4.4.0-116-lowlatency, linux, linux-image-4.4.0-116-generic, linux-aws, linux-image-generic, linux-image-powerpc-smp, linux-image-lowlatency, linux-image-4.4.0-116-powerpc-smp, linux-image-powerpc-e500mc, linux-image-4.4.0-1087-snapdragon, linux-kvm, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-116-powerpc-e500mc, linux-snapdragon, linux-image-4.4.0-1019-kvm, linux-image-aws, linux-image-4.4.0-1085-raspi2, linux-image-powerpc64-emb, linux-image-powerpc64-smp, linux-raspi2, linux-image-4.4.0-1052-aws, linux-image-raspi2, linux-image-4.4.0-116-generic-lpae
  • USN-3581-1: linux-image-4.13.0-36-generic-lpae, linux, linux-image-4.13.0-36-lowlatency, linux-image-4.13.0-36-generic, linux-image-generic, linux-image-generic-lpae, linux-image-lowlatency
  • USN-3530-1: webkit2gtk, libjavascriptcoregtk-4.0-18, libwebkit2gtk-4.0-37
  • USN-3581-2: linux-azure, linux-image-4.13.0-36-generic-lpae, linux-image-azure, linux-gcp, linux-image-4.13.0-1011-gcp, linux-oem, linux-image-4.13.0-1011-azure, linux-image-lowlatency-hwe-16.04, linux-image-4.13.0-36-lowlatency, linux-image-generic-lpae-hwe-16.04, linux-hwe, linux-image-4.13.0-36-generic, linux-image-gcp, linux-image-generic-hwe-16.04, linux-image-gke, linux-image-oem, linux-image-4.13.0-1021-oem
  • USN-3542-2: linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-140-generic
  • USN-3620-2: linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-144-generic-lpae, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-144-generic
  • USN-3582-2: linux-lts-xenial, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-116-powerpc-e500mc, linux-image-generic-lts-xenial, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-116-generic, linux-image-powerpc-smp-lts-xenial, linux-image-generic-lpae-lts-xenial, linux-image-4.4.0-116-powerpc64-emb, linux-aws, linux-image-powerpc64-emb-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-aws, linux-image-4.4.0-1014-aws, linux-image-lowlatency-lts-xenial, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-116-generic-lpae
  • USN-3560-1: qemu-system-x86, qemu, qemu-system-s390x, qemu-system