USN-3208-1: Linux kernel vulnerabilities

Releases

• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel
• linux-snapdragon - Linux kernel for Snapdragon Processors

Details

It was discovered that the generic SCSI block layer in the Linux kernel did
not properly restrict write operations in certain situations. A local
attacker could use this to cause a denial of service (system crash) or
possibly gain administrative privileges. (CVE-2016-10088)

CAI Qian discovered that the sysctl implementation in the Linux kernel did
not properly perform reference counting in some situations. An unprivileged
attacker could use this to cause a denial of service (system hang).
(CVE-2016-9191)

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)

Andy Lutomirski and Willy Tarreau discovered that the KVM implementation in
the Linux kernel did not properly emulate instructions on the SS segment
register. A local attacker in a guest virtual machine could use this to
cause a denial of service (guest OS crash) or possibly gain administrative
privileges in the guest OS. (CVE-2017-2583)

Dmitry Vyukov discovered that the KVM implementation in the Linux kernel
improperly emulated certain instructions. A local attacker could use this
to obtain sensitive information (kernel memory). (CVE-2017-2584)

It was discovered that the KLSI KL5KUSB105 serial-to-USB device driver in
the Linux kernel did not properly initialize memory related to logging. A
local attacker could use this to expose sensitive information (kernel
memory). (CVE-2017-5549)

Andrey Konovalov discovered a use-after-free vulnerability in the DCCP
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly gain administrative
privileges. (CVE-2017-6074)

Update instructions

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

Ubuntu 16.04

• linux-image-4.4.0-1048-snapdragon - 4.4.0-1048.52
• linux-image-4.4.0-64-generic - 4.4.0-64.85
• linux-image-4.4.0-64-generic-lpae - 4.4.0-64.85
• linux-image-4.4.0-64-lowlatency - 4.4.0-64.85
• linux-image-4.4.0-64-powerpc-e500mc - 4.4.0-64.85
• linux-image-4.4.0-64-powerpc-smp - 4.4.0-64.85
• linux-image-4.4.0-64-powerpc64-emb - 4.4.0-64.85
• linux-image-4.4.0-64-powerpc64-smp - 4.4.0-64.85

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-2016-10088
• CVE-2016-9191
• CVE-2016-9588
• CVE-2017-2583
• CVE-2017-2584
• CVE-2017-5549
• CVE-2017-6074

Related notices

• USN-3208-2: linux-image-4.4.0-64-generic-lpae, linux-image-4.4.0-64-lowlatency, linux-image-extra-4.4.0-64-generic, linux-lts-xenial, linux-image-4.4.0-64-powerpc64-smp, linux-image-4.4.0-64-powerpc-e500mc, linux-image-4.4.0-64-powerpc-smp, linux-image-4.4.0-64-powerpc64-emb, linux-image-4.4.0-64-generic
• USN-3209-1: linux-image-4.8.0-1026-raspi2, linux-image-4.8.0-39-lowlatency, linux-image-4.8.0-39-powerpc64-emb, linux, linux-image-powerpc-e500mc, linux-image-4.8.0-39-powerpc-e500mc, linux-image-lowlatency, linux-image-4.8.0-39-generic-lpae, linux-image-powerpc64-emb, linux-image-4.8.0-39-powerpc-smp, linux-image-generic, linux-image-4.8.0-39-generic, linux-image-generic-lpae, linux-image-powerpc-smp, linux-image-raspi2, linux-raspi2
• USN-3360-1: linux-image-3.13.0-125-powerpc64-smp, linux-image-3.13.0-125-powerpc-smp, linux, linux-image-3.13.0-125-powerpc-e500, linux-image-3.13.0-125-generic-lpae, linux-image-extra-3.13.0-125-generic, linux-image-3.13.0-125-powerpc64-emb, linux-image-3.13.0-125-lowlatency, linux-image-3.13.0-125-powerpc-e500mc, linux-image-3.13.0-125-generic
• USN-3360-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-125-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty, linux-image-3.13.0-125-generic
• USN-3361-1: linux-image-4.10.0-27-lowlatency, linux-image-4.10.0-27-generic-lpae, linux-hwe, linux-image-4.10.0-27-generic, linux-image-extra-4.10.0-27-generic
• USN-3422-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-132-generic, linux-image-3.13.0-132-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty
• USN-3422-1: linux-image-3.13.0-132-powerpc64-emb, linux-image-3.13.0-132-generic, linux-image-3.13.0-132-generic-lpae, linux-image-3.13.0-132-powerpc-e500mc, linux, linux-image-extra-3.13.0-132-generic, linux-image-3.13.0-132-powerpc64-smp, linux-image-3.13.0-132-lowlatency, linux-image-3.13.0-132-powerpc-e500, linux-image-3.13.0-132-powerpc-smp
• USN-3822-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-162-generic-lpae, linux-image-3.13.0-162-generic, linux-lts-trusty, linux-image-generic-lts-trusty
• USN-3822-1: linux-image-3.13.0-162-powerpc-smp, linux-image-3.13.0-162-powerpc64-emb, linux-image-3.13.0-162-generic-lpae, linux-image-3.13.0-162-powerpc-e500mc, linux, linux-image-extra-3.13.0-162-generic, linux-image-3.13.0-162-powerpc64-smp, linux-image-3.13.0-162-generic, linux-image-3.13.0-162-powerpc-e500, linux-image-3.13.0-162-lowlatency
• USN-3754-1: linux-image-extra-3.13.0-157-generic, linux-image-3.13.0-157-powerpc64-smp, linux, linux-image-3.13.0-157-powerpc-e500mc, linux-image-3.13.0-157-generic-lpae, linux-image-3.13.0-157-lowlatency, linux-image-3.13.0-157-generic, linux-image-3.13.0-157-powerpc-e500, linux-image-3.13.0-157-powerpc64-emb, linux-image-3.13.0-157-powerpc-smp
• USN-3207-1: linux-image-3.13.0-110-generic, linux-image-3.13.0-110-powerpc64-smp, linux, linux-image-3.13.0-110-powerpc-smp, linux-image-3.13.0-110-generic-lpae, linux-image-extra-3.13.0-110-generic, linux-image-3.13.0-110-powerpc-e500mc, linux-image-3.13.0-110-powerpc64-emb, linux-image-3.13.0-110-lowlatency, linux-image-3.13.0-110-powerpc-e500
• USN-3206-1: linux-image-3.2.0-123-highbank, linux-image-virtual, linux-image-powerpc64-smp, linux-image-3.2.0-123-generic, linux-ti-omap4, linux, linux-image-3.2.0-1501-omap4, linux-image-generic-pae, linux-image-3.2.0-123-omap, linux-image-powerpc-smp, linux-image-3.2.0-123-powerpc-smp, linux-image-generic, linux-image-omap4, linux-image-highbank, linux-image-omap, linux-image-3.2.0-123-virtual, linux-image-3.2.0-123-powerpc64-smp, linux-image-3.2.0-123-generic-pae
• USN-3207-2: linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-110-generic, linux-image-3.13.0-110-generic-lpae, linux-lts-trusty, linux-image-generic-lts-trusty