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USN-3594-1: Linux kernel vulnerability

9 March 2018

The system could be made to expose sensitive information.

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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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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-3530-1: libwebkit2gtk-4.0-dev, libjavascriptcoregtk-4.0-18, gir1.2-webkit2-4.0, libjavascriptcoregtk-4.0-bin, libjavascriptcoregtk-4.0-dev, webkit2gtk, libwebkit2gtk-4.0-37-gtk2, gir1.2-javascriptcoregtk-4.0, libwebkit2gtk-4.0-doc, libwebkit2gtk-4.0-37
  • USN-3580-1: linux, linux-image-generic, linux-image-3.2.0-133-generic, linux-image-generic-pae, linux-image-3.2.0-133-generic-pae
  • USN-3620-2: linux-image-generic-lts-trusty, linux-image-3.13.0-144-generic-lpae, linux-image-3.13.0-144-generic, linux-image-generic-lpae-lts-trusty, linux-lts-trusty
  • USN-3541-2: linux-image-4.13.0-1006-azure, linux-image-4.13.0-31-lowlatency, linux-image-4.13.0-1017-oem, linux-image-4.13.0-1007-gcp, linux-hwe, linux-image-4.13.0-31-generic, linux-oem, linux-gcp, linux-image-extra-4.13.0-1006-azure, linux-image-extra-4.13.0-31-generic, linux-image-4.13.0-31-generic-lpae, linux-azure, linux-image-extra-4.13.0-1007-gcp
  • USN-3531-3: intel-microcode
  • USN-3560-1: qemu-system-x86, qemu-user-binfmt, qemu-kvm, qemu-keymaps, qemu-user-static, qemu-system-sparc, qemu-system-aarch64, qemu-system-ppc, qemu-system-common, qemu-system-s390x, qemu-system-arm, qemu-common, qemu, qemu-utils, qemu-system, qemu-system-misc, qemu-guest-agent, qemu-block-extra, qemu-user, qemu-system-mips
  • USN-3531-1: intel-microcode
  • USN-3540-1: linux, linux-image-4.4.0-112-powerpc-e500mc, linux-image-4.4.0-112-powerpc64-smp, linux-image-4.4.0-1049-aws, linux-image-4.4.0-112-generic-lpae, linux-image-4.4.0-9023-euclid, linux-image-extra-4.4.0-9023-euclid, linux-euclid, linux-image-4.4.0-112-powerpc-smp, linux-image-extra-4.4.0-112-generic, linux-image-4.4.0-112-lowlatency, linux-image-4.4.0-112-powerpc64-emb, linux-aws, linux-image-4.4.0-112-generic
  • USN-3540-2: linux-image-4.4.0-111-generic, linux-image-extra-4.4.0-111-generic, linux-image-4.4.0-111-powerpc-smp, linux-image-4.4.0-111-powerpc-e500mc, linux-lts-xenial, linux-image-4.4.0-111-powerpc64-emb, linux-image-4.4.0-111-generic-lpae, linux-image-4.4.0-111-powerpc64-smp, linux-image-4.4.0-1011-aws, linux-aws, linux-image-4.4.0-111-lowlatency
  • USN-3561-1: libvirt0, libvirt-bin, libvirt-doc, libvirt, libvirt-dev
  • USN-3549-1: linux-kvm, linux-image-4.4.0-1017-kvm
  • USN-3777-3: linux-azure, linux-image-unsigned-4.15.0-1025-azure
  • USN-3581-1: linux-image-4.13.0-36-lowlatency, linux-image-lowlatency, linux, linux-image-generic, linux-image-4.13.0-36-generic, linux-image-4.13.0-36-generic-lpae, linux-image-generic-lpae
  • USN-3690-1: amd64-microcode
  • USN-3582-2: linux-image-4.4.0-116-powerpc-e500mc, linux-image-extra-4.4.0-116-generic, linux-image-4.4.0-116-powerpc64-smp, linux-lts-xenial, linux-image-4.4.0-116-generic, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-116-powerpc64-emb, linux-image-4.4.0-1014-aws, linux-aws, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-generic-lpae
  • USN-3597-2: linux-image-extra-4.13.0-37-generic, linux-image-4.13.0-37-lowlatency, linux-hwe, linux-image-4.13.0-37-generic, linux-image-4.13.0-37-generic-lpae
  • USN-3516-1: firefox-locale-eu, firefox-locale-or, firefox-locale-kk, firefox-locale-en, firefox-locale-ro, firefox-locale-hu, firefox-locale-as, firefox-locale-km, firefox-locale-eo, firefox-locale-zh-hans, firefox-locale-bg, firefox-locale-be, firefox-locale-et, firefox-locale-ast, firefox-locale-fy, firefox-locale-cs, firefox-locale-is, firefox-locale-it, firefox-locale-cy, firefox-locale-zh-hant, firefox-locale-te, firefox-locale-csb, firefox-locale-el, firefox-locale-hy, firefox-locale-ar, firefox-locale-oc, firefox-locale-sq, firefox-locale-mai, firefox-locale-sl, firefox-locale-ru, firefox-locale-xh, firefox-locale-fr, firefox-locale-ja, firefox-locale-hi, firefox-mozsymbols, firefox-locale-kab, firefox-locale-lv, firefox-globalmenu, firefox-locale-id, firefox-locale-pa, firefox-locale-ml, firefox-locale-es, firefox-locale-ca, firefox-locale-tr, firefox-locale-th, firefox-locale-mn, firefox-locale-da, firefox-locale-ga, firefox-locale-kn, firefox-locale-nb, firefox-locale-pl, firefox-locale-my, firefox-locale-fa, firefox-dev, firefox-locale-hr, firefox-locale-an, firefox-locale-ku, firefox-locale-uz, firefox-locale-de, firefox-locale-gn, firefox-locale-gu, firefox-locale-sr, firefox-locale-vi, firefox-locale-nso, firefox-locale-af, firefox-locale-ko, firefox, firefox-locale-pt, firefox-locale-sw, firefox-locale-sv, firefox-locale-he, firefox-locale-lg, firefox-locale-nn, firefox-locale-si, firefox-testsuite, firefox-locale-gd, firefox-locale-uk, firefox-locale-gl, firefox-locale-ka, firefox-locale-mr, firefox-locale-cak, firefox-locale-br, firefox-locale-zu, firefox-locale-az, firefox-locale-nl, firefox-locale-sk, firefox-locale-bn, firefox-locale-mk, firefox-locale-ta, firefox-locale-bs, firefox-locale-ur, firefox-locale-fi, firefox-locale-ms, firefox-locale-hsb, firefox-locale-lt
  • USN-3541-1: linux-image-4.13.0-31-lowlatency, linux-image-lowlatency, linux, linux-image-4.13.0-31-generic, linux-image-generic
  • USN-3597-1: linux-raspi2, linux-image-lowlatency, linux-image-4.13.0-37-lowlatency, linux, linux-image-generic, linux-image-4.13.0-1015-raspi2, linux-image-raspi2, linux-image-generic-lpae, linux-image-4.13.0-37-generic, linux-image-4.13.0-37-generic-lpae
  • USN-3582-1: linux-raspi2, linux-kvm, linux-image-4.4.0-1085-raspi2, linux, linux-image-4.4.0-116-powerpc-e500mc, linux-image-extra-4.4.0-116-generic, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-116-generic, linux-image-4.4.0-1052-aws, linux-image-4.4.0-1087-snapdragon, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-116-powerpc64-emb, linux-image-4.4.0-1019-kvm, linux-aws, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-generic-lpae, linux-snapdragon
  • USN-3542-1: linux-image-3.13.0-141-powerpc-smp, linux, linux-image-3.13.0-141-powerpc64-emb, linux-image-3.13.0-141-lowlatency, linux-image-3.13.0-141-generic-lpae, linux-image-extra-3.13.0-141-generic, linux-image-3.13.0-141-powerpc64-smp, linux-image-3.13.0-141-powerpc-e500, linux-image-3.13.0-141-generic, linux-image-3.13.0-141-powerpc-e500mc
  • USN-3542-2: linux-image-generic-lts-trusty, linux-image-3.13.0-140-generic, linux-lts-trusty
  • USN-3581-2: linux-image-4.13.0-36-lowlatency, linux-hwe, linux-oem, linux-gcp, linux-image-4.13.0-1011-gcp, linux-image-4.13.0-1021-oem, linux-image-4.13.0-1011-azure, linux-image-4.13.0-36-generic, linux-image-4.13.0-36-generic-lpae, linux-image-extra-4.13.0-1011-azure, linux-azure, linux-image-extra-4.13.0-1011-gcp, linux-image-extra-4.13.0-36-generic