USN-3597-1: Linux kernel vulnerabilities

Releases

• Ubuntu 17.10

Packages

• linux - Linux kernel
• linux-raspi2 - Linux kernel for Raspberry Pi 2

Details

USNS 3541-1 and 3523-1 provided mitigations for Spectre and Meltdown
(CVE-2017-5715, CVE-2017-5753, CVE-2017-5754) for the i386, amd64,
and ppc64el architectures in Ubuntu 17.10. This update provides
the corresponding mitigations for the arm64 architecture. Original
advisory details:

Jann Horn discovered that microprocessors utilizing speculative execution
and indirect branch prediction may allow unauthorized memory reads via
sidechannel attacks. This flaw is known as Meltdown. A local attacker could
use this to expose sensitive information, including kernel memory.
(CVE-2017-5754)

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,
CVE-2017-5753)

Update instructions

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

Ubuntu 17.10

• linux-image-4.13.0-37-lowlatency - 4.13.0-37.42
• linux-image-generic - 4.13.0.37.40
• linux-image-4.13.0-37-generic - 4.13.0-37.42
• linux-image-generic-lpae - 4.13.0.37.40
• linux-image-4.13.0-1015-raspi2 - 4.13.0-1015.16
• linux-image-4.13.0-37-generic-lpae - 4.13.0-37.42
• linux-image-lowlatency - 4.13.0.37.40
• linux-image-raspi2 - 4.13.0.1015.13

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

• CVE-2017-5715
• CVE-2017-5753
• CVE-2017-5754
• https://usn.ubuntu.com/3541-1/
• https://usn.ubuntu.com/3523-1/

Related notices

• USN-3530-1: libwebkit2gtk-4.0-doc, webkit2gtk, libwebkit2gtk-4.0-37, libjavascriptcoregtk-4.0-dev, gir1.2-webkit2-4.0, libjavascriptcoregtk-4.0-bin, libjavascriptcoregtk-4.0-18, gir1.2-javascriptcoregtk-4.0, libwebkit2gtk-4.0-37-gtk2, libwebkit2gtk-4.0-dev
• USN-3594-1: linux-image-3.13.0-143-powerpc-smp, linux-image-3.13.0-143-generic, linux-image-extra-3.13.0-143-generic, linux-image-3.13.0-143-generic-lpae, linux-image-3.13.0-143-lowlatency, linux, linux-image-3.13.0-143-powerpc-e500mc, linux-image-3.13.0-143-powerpc-e500, linux-image-3.13.0-143-powerpc64-emb, linux-image-3.13.0-143-powerpc64-smp
• USN-3580-1: linux-image-generic-pae, linux-image-3.2.0-133-generic-pae, linux-image-generic, linux, linux-image-3.2.0-133-generic
• USN-3620-2: linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-144-generic, linux-image-3.13.0-144-generic-lpae
• USN-3541-2: linux-image-4.13.0-1007-gcp, linux-image-4.13.0-31-lowlatency, linux-oem, linux-gcp, linux-image-extra-4.13.0-1007-gcp, linux-image-4.13.0-1017-oem, linux-hwe, linux-image-4.13.0-31-generic-lpae, linux-image-extra-4.13.0-31-generic, linux-azure, linux-image-4.13.0-31-generic, linux-image-extra-4.13.0-1006-azure, linux-image-4.13.0-1006-azure
• USN-3531-3: intel-microcode
• USN-3560-1: qemu-system-misc, qemu-user-static, qemu-system-aarch64, qemu-system, qemu-guest-agent, qemu, qemu-common, qemu-block-extra, qemu-system-arm, qemu-system-sparc, qemu-system-mips, qemu-keymaps, qemu-kvm, qemu-user, qemu-system-common, qemu-system-ppc, qemu-system-x86, qemu-user-binfmt, qemu-utils, qemu-system-s390x
• USN-3531-1: intel-microcode
• USN-3540-1: linux-image-4.4.0-112-generic-lpae, linux-image-4.4.0-112-generic, linux-image-4.4.0-1049-aws, linux-image-4.4.0-112-powerpc-e500mc, linux-image-extra-4.4.0-112-generic, linux-image-4.4.0-112-powerpc-smp, linux-aws, linux-euclid, linux, linux-image-4.4.0-112-lowlatency, linux-image-extra-4.4.0-9023-euclid, linux-image-4.4.0-9023-euclid, linux-image-4.4.0-112-powerpc64-smp, linux-image-4.4.0-112-powerpc64-emb
• USN-3540-2: linux-image-4.4.0-1011-aws, linux-lts-xenial, linux-image-4.4.0-111-powerpc-smp, linux-image-4.4.0-111-powerpc64-emb, linux-image-4.4.0-111-generic, linux-image-4.4.0-111-lowlatency, linux-image-4.4.0-111-powerpc-e500mc, linux-aws, linux-image-extra-4.4.0-111-generic, linux-image-4.4.0-111-powerpc64-smp, linux-image-4.4.0-111-generic-lpae
• USN-3561-1: libvirt, libvirt-bin, libvirt0, libvirt-dev, libvirt-doc
• 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-lowlatency, linux-image-generic-lpae, linux-image-4.13.0-36-generic, linux-image-4.13.0-36-generic-lpae, linux-image-generic, linux, linux-image-4.13.0-36-lowlatency
• USN-3690-1: amd64-microcode
• USN-3582-2: linux-image-4.4.0-116-lowlatency, linux-lts-xenial, linux-image-4.4.0-1014-aws, linux-image-4.4.0-116-generic, linux-image-4.4.0-116-powerpc-e500mc, linux-image-extra-4.4.0-116-generic, linux-aws, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-116-generic-lpae, linux-image-4.4.0-116-powerpc64-emb
• USN-3597-2: linux-image-4.13.0-37-generic, linux-image-4.13.0-37-lowlatency, linux-hwe, linux-image-4.13.0-37-generic-lpae, linux-image-extra-4.13.0-37-generic
• USN-3516-1: firefox-locale-ms, firefox-locale-sq, firefox-locale-sv, firefox-locale-be, firefox-locale-pt, firefox-locale-ga, firefox-locale-gu, firefox-locale-ro, firefox-testsuite, firefox-locale-kk, firefox-locale-kn, firefox-locale-nn, firefox-locale-bn, firefox-locale-ast, firefox-locale-af, firefox-locale-mr, firefox-locale-da, firefox-locale-el, firefox-locale-si, firefox-locale-sk, firefox-mozsymbols, firefox-locale-nb, firefox-locale-cs, firefox-locale-mk, firefox-locale-sl, firefox-locale-tr, firefox-locale-nl, firefox-locale-mn, firefox-locale-cak, firefox-locale-de, firefox-locale-gl, firefox-locale-fy, firefox-locale-hi, firefox-locale-ml, firefox-dev, firefox-locale-az, firefox, firefox-locale-ur, firefox-locale-xh, firefox-locale-nso, firefox-locale-vi, firefox-locale-bs, firefox-locale-sw, firefox-locale-ca, firefox-locale-br, firefox-locale-zu, firefox-locale-hy, firefox-locale-kab, firefox-locale-uk, firefox-locale-pa, firefox-locale-lg, firefox-locale-zh-hant, firefox-locale-cy, firefox-locale-th, firefox-locale-te, firefox-locale-or, firefox-locale-ku, firefox-locale-mai, firefox-locale-sr, firefox-locale-it, firefox-locale-ko, firefox-locale-hsb, firefox-locale-oc, firefox-locale-fa, firefox-locale-km, firefox-locale-hu, firefox-locale-ta, firefox-locale-ru, firefox-locale-zh-hans, firefox-locale-ka, firefox-locale-csb, firefox-locale-bg, firefox-locale-ar, firefox-locale-my, firefox-locale-lv, firefox-locale-uz, firefox-locale-eo, firefox-locale-pl, firefox-locale-es, firefox-locale-hr, firefox-locale-an, firefox-locale-gn, firefox-globalmenu, firefox-locale-id, firefox-locale-as, firefox-locale-et, firefox-locale-fr, firefox-locale-ja, firefox-locale-he, firefox-locale-lt, firefox-locale-eu, firefox-locale-fi, firefox-locale-is, firefox-locale-en, firefox-locale-gd
• USN-3541-1: linux-image-lowlatency, linux-image-4.13.0-31-lowlatency, linux-image-generic, linux, linux-image-4.13.0-31-generic
• USN-3582-1: linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-generic-lpae, linux-kvm, linux-image-4.4.0-1085-raspi2, linux-image-4.4.0-116-generic, linux-image-4.4.0-116-powerpc-e500mc, linux-image-extra-4.4.0-116-generic, linux-raspi2, linux-aws, linux-image-4.4.0-1019-kvm, linux, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-1087-snapdragon, linux-image-4.4.0-116-powerpc64-smp, linux-snapdragon, linux-image-4.4.0-1052-aws, linux-image-4.4.0-116-powerpc64-emb
• USN-3542-1: linux-image-3.13.0-141-generic, linux-image-3.13.0-141-powerpc-e500mc, linux-image-3.13.0-141-generic-lpae, linux, linux-image-3.13.0-141-powerpc64-emb, linux-image-3.13.0-141-lowlatency, linux-image-3.13.0-141-powerpc-e500, linux-image-3.13.0-141-powerpc64-smp, linux-image-extra-3.13.0-141-generic, linux-image-3.13.0-141-powerpc-smp
• USN-3542-2: linux-image-3.13.0-140-generic, linux-lts-trusty, linux-image-generic-lts-trusty
• USN-3581-2: linux-image-4.13.0-36-generic, linux-gcp, linux-oem, linux-image-extra-4.13.0-36-generic, linux-image-4.13.0-1021-oem, linux-image-4.13.0-36-generic-lpae, linux-hwe, linux-image-4.13.0-1011-azure, linux-azure, linux-image-extra-4.13.0-1011-gcp, linux-image-4.13.0-36-lowlatency, linux-image-4.13.0-1011-gcp, linux-image-extra-4.13.0-1011-azure
• USN-3521-1: nvidia-375, nvidia-384, nvidia-opencl-icd-384, nvidia-opencl-icd-375, nvidia-libopencl1-375, nvidia-384-dev, libcuda1-384, nvidia-375-dev, libcuda1-375, nvidia-graphics-drivers-384, nvidia-libopencl1-384
• USN-3523-2: linux-image-4.13.0-26-generic, linux-oem, linux-gcp, linux-image-4.13.0-1015-oem, linux-image-4.13.0-1005-azure, linux-image-extra-4.13.0-1006-gcp, linux-hwe, linux-image-extra-4.13.0-26-generic, linux-image-4.13.0-26-lowlatency, linux-image-4.13.0-1006-gcp, linux-azure, linux-image-4.13.0-26-generic-lpae, linux-image-extra-4.13.0-1005-azure
• USN-3522-1: linux-image-4.4.0-108-generic-lpae, linux-image-4.4.0-108-generic, linux-kvm, linux-image-extra-4.4.0-108-generic, linux-image-extra-4.4.0-9021-euclid, linux-image-4.4.0-9021-euclid, linux-aws, linux-image-4.4.0-108-powerpc-smp, linux-euclid, linux, linux-image-4.4.0-108-lowlatency, linux-image-4.4.0-108-powerpc-e500mc, linux-image-4.4.0-108-powerpc64-emb, linux-image-4.4.0-108-powerpc64-smp, linux-image-4.4.0-1015-kvm, linux-image-4.4.0-1047-aws
• USN-3522-2: linux-lts-xenial, linux-image-4.4.0-108-generic-lpae, linux-image-4.4.0-108-generic, linux-image-extra-4.4.0-108-generic, linux-aws, linux-image-4.4.0-108-powerpc-smp, linux-image-4.4.0-108-lowlatency, linux-image-4.4.0-108-powerpc-e500mc, linux-image-4.4.0-108-powerpc64-emb, linux-image-4.4.0-108-powerpc64-smp, linux-image-4.4.0-1009-aws
• USN-3524-2: linux-image-3.13.0-139-generic, linux-image-3.13.0-139-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-generic-lpae-lts-trusty
• USN-3524-1: linux-image-3.13.0-139-powerpc-e500, linux-image-3.13.0-139-powerpc-smp, linux-image-3.13.0-139-generic, linux-image-3.13.0-139-powerpc64-smp, linux-image-3.13.0-139-generic-lpae, linux-image-3.13.0-139-powerpc64-emb, linux, linux-image-3.13.0-139-powerpc-e500mc, linux-image-extra-3.13.0-139-generic, linux-image-3.13.0-139-lowlatency
• USN-3523-1: linux-image-4.13.0-25-lowlatency, linux-image-lowlatency, linux-image-4.13.0-25-generic, linux-image-generic, linux
• USN-3525-1: linux-image-generic-pae, linux-image-3.2.0-132-generic-pae, linux-image-3.2.0-132-generic, linux-image-generic, linux
• USN-3583-1: linux-image-extra-3.13.0-142-generic, linux-image-3.13.0-142-lowlatency, linux-image-3.13.0-142-powerpc-smp, linux-image-3.13.0-142-powerpc64-smp, linux-image-3.13.0-142-generic, linux-image-3.13.0-142-powerpc64-emb, linux, linux-image-3.13.0-142-generic-lpae, linux-image-3.13.0-142-powerpc-e500mc, linux-image-3.13.0-142-powerpc-e500