USN-3487-1: Linux kernel vulnerabilities

Releases

• Ubuntu 17.10

Packages

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

Details

It was discovered that the KVM subsystem in the Linux kernel did not
properly keep track of nested levels in guest page tables. A local attacker
in a guest VM could use this to cause a denial of service (host OS crash)
or possibly execute arbitrary code in the host OS. (CVE-2017-12188)

It was discovered that on the PowerPC architecture, the kernel did not
properly sanitize the signal stack when handling sigreturn(). A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-1000255)

Bo Zhang discovered that the netlink wireless configuration interface in
the Linux kernel did not properly validate attributes when handling certain
requests. A local attacker with the CAP_NET_ADMIN could use this to cause a
denial of service (system crash). (CVE-2017-12153)

It was discovered that the nested KVM implementation in the Linux kernel in
some situations did not properly prevent second level guests from reading
and writing the hardware CR8 register. A local attacker in a guest could
use this to cause a denial of service (system crash). (CVE-2017-12154)

Vitaly Mayatskikh discovered that the SCSI subsystem in the Linux kernel
did not properly track reference counts when merging buffers. A local
attacker could use this to cause a denial of service (memory exhaustion).
(CVE-2017-12190)

It was discovered that the key management subsystem in the Linux kernel did
not properly restrict key reads on negatively instantiated keys. A local
attacker could use this to cause a denial of service (system crash).
(CVE-2017-12192)

It was discovered that the ATI Radeon framebuffer driver in the Linux
kernel did not properly initialize a data structure returned to user space.
A local attacker could use this to expose sensitive information (kernel
memory). (CVE-2017-14156)

ChunYu Wang discovered that the iSCSI transport implementation in the Linux
kernel did not properly validate data structures. A local attacker could
use this to cause a denial of service (system crash). (CVE-2017-14489)

Alexander Potapenko discovered an information leak in the waitid
implementation of the Linux kernel. A local attacker could use this to
expose sensitive information (kernel memory). (CVE-2017-14954)

It was discovered that a race condition existed in the ALSA subsystem of
the Linux kernel when creating and deleting a port via ioctl(). A local
attacker could use this to cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-15265)

Dmitry Vyukov discovered that the Floating Point Unit (fpu) subsystem in
the Linux kernel did not properly handle attempts to set reserved bits in a
task's extended state (xstate) area. A local attacker could use this to
cause a denial of service (system crash). (CVE-2017-15537)

It was discovered that a race condition existed in the packet fanout
implementation in the Linux kernel. A local attacker could use this to
cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-15649)

Andrey Konovalov discovered a use-after-free vulnerability in the USB
serial console driver in the Linux kernel. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2017-16525)

Andrey Konovalov discovered that the Ultra Wide Band driver in the Linux
kernel did not properly check for an error condition. A physically
proximate attacker could use this to cause a denial of service (system
crash) or possibly execute arbitrary code. (CVE-2017-16526)

Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel
contained a use-after-free vulnerability. A local attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2017-16527)

Andrey Konovalov discovered that the ALSA subsystem in the Linux kernel did
not properly validate USB audio buffer descriptors. A physically proximate
attacker could use this cause a denial of service (system crash) or
possibly execute arbitrary code. (CVE-2017-16529)

Andrey Konovalov discovered that the USB unattached storage driver in the
Linux kernel contained out-of-bounds error when handling alternative
settings. A physically proximate attacker could use to cause a denial of
service (system crash) or possibly execute arbitrary code. (CVE-2017-16530)

Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
not properly validate USB interface association descriptors. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2017-16531)

Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
not properly validate USB HID descriptors. A physically proximate attacker
could use this to cause a denial of service (system crash).
(CVE-2017-16533)

Andrey Konovalov discovered that the USB subsystem in the Linux kernel did
not properly validate CDC metadata. A physically proximate attacker could
use this to cause a denial of service (system crash) or possibly execute
arbitrary code. (CVE-2017-16534)

Update instructions

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

Ubuntu 17.10

• linux-image-4.13.0-17-generic - 4.13.0-17.20
• linux-image-generic - 4.13.0.17.18
• linux-image-4.13.0-17-lowlatency - 4.13.0-17.20
• linux-image-generic-lpae - 4.13.0.17.18
• linux-image-4.13.0-1006-raspi2 - 4.13.0-1006.6
• linux-image-4.13.0-17-generic-lpae - 4.13.0-17.20
• linux-image-lowlatency - 4.13.0.17.18
• linux-image-raspi2 - 4.13.0.1006.4

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-2017-1000255
• CVE-2017-12153
• CVE-2017-12154
• CVE-2017-12188
• CVE-2017-12190
• CVE-2017-12192
• CVE-2017-14156
• CVE-2017-14489
• CVE-2017-14954
• CVE-2017-15265
• CVE-2017-15537
• CVE-2017-15649
• CVE-2017-16525
• CVE-2017-16526
• CVE-2017-16527
• CVE-2017-16529
• CVE-2017-16530
• CVE-2017-16531
• CVE-2017-16533
• CVE-2017-16534

Related notices

• USN-3443-2: linux-image-4.10.0-37-lowlatency, linux-image-4.10.0-37-generic, linux-hwe, linux-image-4.10.0-37-generic-lpae, linux-image-extra-4.10.0-37-generic
• USN-3443-1: linux-image-4.10.0-37-lowlatency, linux-image-4.10.0-37-generic, linux-image-generic, linux-image-4.10.0-1019-raspi2, linux-image-lowlatency, linux-image-powerpc64-smp, linux-raspi2, linux-image-virtual, linux-image-powerpc-e500mc, linux-image-powerpc64-emb, linux-image-generic-lpae, linux-image-powerpc-smp, linux-image-4.10.0-37-generic-lpae, linux-image-raspi2, linux
• USN-3583-2: linux-image-3.13.0-142-generic-lpae, linux-image-generic-lts-trusty, linux-image-3.13.0-142-generic, linux-image-generic-lpae-lts-trusty, linux-lts-trusty
• USN-3469-1: linux-image-4.4.0-98-powerpc64-smp, linux-gke, linux-image-4.4.0-1076-raspi2, linux-image-extra-4.4.0-98-generic, linux-image-4.4.0-1033-gke, linux-image-4.4.0-98-powerpc-e500mc, linux-aws, linux, linux-kvm, linux-image-4.4.0-1039-aws, linux-raspi2, linux-image-4.4.0-1009-kvm, linux-snapdragon, linux-image-4.4.0-98-generic, linux-image-extra-4.4.0-1033-gke, linux-image-4.4.0-98-powerpc-smp, linux-image-4.4.0-98-generic-lpae, linux-image-4.4.0-98-powerpc64-emb, linux-image-4.4.0-98-lowlatency, linux-image-4.4.0-1078-snapdragon
• USN-3469-2: linux-lts-xenial, linux-image-4.4.0-98-powerpc-smp, linux-image-4.4.0-98-powerpc64-smp, linux-image-4.4.0-98-generic-lpae, linux-image-extra-4.4.0-98-generic, linux-image-4.4.0-98-powerpc64-emb, linux-image-4.4.0-98-lowlatency, linux-image-4.4.0-98-powerpc-e500mc, linux-image-4.4.0-98-generic
• USN-3583-1: linux-image-3.13.0-142-powerpc-e500mc, linux-image-3.13.0-142-powerpc-smp, linux-image-3.13.0-142-powerpc64-emb, linux-image-3.13.0-142-generic-lpae, linux-image-3.13.0-142-powerpc-e500, linux-image-3.13.0-142-generic, linux-image-3.13.0-142-lowlatency, linux-image-3.13.0-142-powerpc64-smp, linux-image-extra-3.13.0-142-generic, linux
• USN-3698-2: linux-image-3.13.0-153-generic-lpae, linux-image-generic-lts-trusty, linux-image-generic-lpae-lts-trusty, linux-image-3.13.0-153-generic, linux-lts-trusty
• USN-3698-1: linux-image-3.13.0-153-powerpc-e500, linux-image-3.13.0-153-generic-lpae, linux-image-3.13.0-153-lowlatency, linux-image-3.13.0-153-powerpc-e500mc, linux-image-3.13.0-153-powerpc64-smp, linux-image-3.13.0-153-powerpc64-emb, linux-image-3.13.0-153-powerpc-smp, linux-image-3.13.0-153-generic, linux-image-extra-3.13.0-153-generic, linux
• USN-3484-2: linux-image-4.10.0-40-generic-lpae, linux-hwe, linux-image-4.10.0-40-lowlatency, linux-image-4.10.0-40-generic, linux-image-extra-4.10.0-40-generic
• USN-3484-3: linux-image-extra-4.10.0-1009-gcp, linux-gcp, linux-image-4.10.0-1009-gcp
• USN-3484-1: linux-image-4.10.0-1021-raspi2, linux-image-generic, linux-raspi2, linux-image-lowlatency, linux-image-4.10.0-40-generic-lpae, linux-image-generic-lpae, linux-image-4.10.0-40-lowlatency, linux-image-4.10.0-40-generic, linux-image-raspi2, linux
• USN-3488-1: linux-image-4.11.0-1015-azure, linux-image-extra-4.11.0-1015-azure, linux-azure
• USN-3582-2: linux-lts-xenial, linux-image-4.4.0-116-powerpc64-emb, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-1014-aws, linux-aws, linux-image-4.4.0-116-powerpc-e500mc, linux-image-extra-4.4.0-116-generic, linux-image-4.4.0-116-generic, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-generic-lpae
• USN-3582-1: linux-image-4.4.0-116-powerpc64-emb, linux-kvm, linux-raspi2, linux-image-4.4.0-116-powerpc-smp, linux-image-4.4.0-116-lowlatency, linux-image-4.4.0-116-powerpc64-smp, linux-image-4.4.0-1085-raspi2, linux-aws, linux-image-4.4.0-1087-snapdragon, linux-image-4.4.0-116-powerpc-e500mc, linux-image-extra-4.4.0-116-generic, linux-image-4.4.0-116-generic-lpae, linux-snapdragon, linux-image-4.4.0-116-generic, linux-image-4.4.0-1019-kvm, linux-image-4.4.0-1052-aws, linux
• USN-3485-1: linux-image-4.4.0-1077-raspi2, linux-gke, linux-image-extra-4.4.0-1034-gke, linux-image-4.4.0-101-generic-lpae, linux-image-4.4.0-101-powerpc-e500mc, linux-aws, linux-image-4.4.0-1034-gke, linux-image-4.4.0-1079-snapdragon, linux, linux-kvm, linux-raspi2, linux-image-4.4.0-101-powerpc64-smp, linux-image-4.4.0-101-lowlatency, linux-image-4.4.0-101-powerpc64-emb, linux-snapdragon, linux-image-4.4.0-101-powerpc-smp, linux-image-4.4.0-101-generic, linux-image-extra-4.4.0-101-generic, linux-image-4.4.0-1041-aws, linux-image-4.4.0-1010-kvm
• USN-3485-3: linux-image-4.4.0-1003-aws, linux-aws
• USN-3485-2: linux-lts-xenial, linux-image-4.4.0-101-generic, linux-image-extra-4.4.0-101-generic, linux-image-4.4.0-101-powerpc64-smp, linux-image-4.4.0-101-lowlatency, linux-image-4.4.0-101-powerpc-e500mc, linux-image-4.4.0-101-generic-lpae, linux-image-4.4.0-101-powerpc64-emb, linux-image-4.4.0-101-powerpc-smp
• USN-3754-1: linux-image-3.13.0-157-powerpc64-emb, linux-image-3.13.0-157-lowlatency, linux-image-3.13.0-157-powerpc-e500mc, linux-image-3.13.0-157-powerpc-smp, linux-image-3.13.0-157-powerpc-e500, linux-image-3.13.0-157-powerpc64-smp, linux-image-extra-3.13.0-157-generic, linux-image-3.13.0-157-generic-lpae, linux-image-3.13.0-157-generic, linux