USN-4162-1: Linux kernel vulnerabilities

Releases

• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• linux - Linux kernel
• linux-aws - Linux kernel for Amazon Web Services (AWS) systems
• linux-aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems
• linux-azure - Linux kernel for Microsoft Azure Cloud systems
• linux-gcp - Linux kernel for Google Cloud Platform (GCP) systems
• linux-gke-4.15 - Linux kernel for Google Container Engine (GKE) systems
• linux-hwe - Linux hardware enablement (HWE) kernel
• linux-kvm - Linux kernel for cloud environments
• linux-oem - Linux kernel for OEM processors
• linux-oracle - Linux kernel for Oracle Cloud systems
• linux-raspi2 - Linux kernel for Raspberry Pi 2
• linux-snapdragon - Linux kernel for Snapdragon processors

Details

It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not
did not handle detach operations correctly, leading to a use-after-free
vulnerability. A physically proximate attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.
(CVE-2018-21008)

Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux
kernel did not properly perform bounds checking, leading to a heap
overflow. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2019-14814,
CVE-2019-14815, CVE-2019-14816)

Matt Delco discovered that the KVM hypervisor implementation in the Linux
kernel did not properly perform bounds checking when handling coalesced
MMIO write operations. A local attacker with write access to /dev/kvm could
use this to cause a denial of service (system crash). (CVE-2019-14821)

Hui Peng and Mathias Payer discovered that the USB audio driver for the
Linux kernel did not properly validate device meta data. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2019-15117)

Hui Peng and Mathias Payer discovered that the USB audio driver for the
Linux kernel improperly performed recursion while handling device meta
data. A physically proximate attacker could use this to cause a denial of
service (system crash). (CVE-2019-15118)

It was discovered that the Technisat DVB-S/S2 USB device driver in the
Linux kernel contained a buffer overread. A physically proximate attacker
could use this to cause a denial of service (system crash) or possibly
expose sensitive information. (CVE-2019-15505)

Brad Spengler discovered that a Spectre mitigation was improperly
implemented in the ptrace susbsystem of the Linux kernel. A local attacker
could possibly use this to expose sensitive information. (CVE-2019-15902)

It was discovered that the SMB networking file system implementation in the
Linux kernel contained a buffer overread. An attacker could use this to
expose sensitive information (kernel memory). (CVE-2019-15918)

Update instructions

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

Ubuntu 18.04

• linux-image-4.15.0-1027-oracle - 4.15.0-1027.30
• linux-image-4.15.0-1046-gke - 4.15.0-1046.49
• linux-image-4.15.0-1048-kvm - 4.15.0-1048.48
• linux-image-4.15.0-1049-raspi2 - 4.15.0-1049.53
• linux-image-4.15.0-1052-aws - 4.15.0-1052.54
• linux-image-4.15.0-1059-oem - 4.15.0-1059.68
• linux-image-4.15.0-1066-snapdragon - 4.15.0-1066.73
• linux-image-4.15.0-66-generic - 4.15.0-66.75
• linux-image-4.15.0-66-generic-lpae - 4.15.0-66.75
• linux-image-4.15.0-66-lowlatency - 4.15.0-66.75
• linux-image-aws - 4.15.0.1052.51
• linux-image-generic - 4.15.0.66.68
• linux-image-generic-lpae - 4.15.0.66.68
• linux-image-gke - 4.15.0.1046.49
• linux-image-gke-4.15 - 4.15.0.1046.49
• linux-image-kvm - 4.15.0.1048.48
• linux-image-lowlatency - 4.15.0.66.68
• linux-image-oem - 4.15.0.1059.63
• linux-image-oracle - 4.15.0.1027.30
• linux-image-raspi2 - 4.15.0.1049.47
• linux-image-snapdragon - 4.15.0.1066.69
• linux-image-virtual - 4.15.0.66.68

Ubuntu 16.04

• linux-image-4.15.0-1027-oracle - 4.15.0-1027.30~16.04.1
• linux-image-4.15.0-1047-gcp - 4.15.0-1047.50
• linux-image-4.15.0-1052-aws - 4.15.0-1052.54~16.04.1
• linux-image-4.15.0-1061-azure - 4.15.0-1061.66
• linux-image-4.15.0-66-generic - 4.15.0-66.75~16.04.1
• linux-image-4.15.0-66-generic-lpae - 4.15.0-66.75~16.04.1
• linux-image-4.15.0-66-lowlatency - 4.15.0-66.75~16.04.1
• linux-image-aws-hwe - 4.15.0.1052.52
• linux-image-azure - 4.15.0.1061.64
• linux-image-gcp - 4.15.0.1047.61
• linux-image-generic-hwe-16.04 - 4.15.0.66.86
• linux-image-generic-lpae-hwe-16.04 - 4.15.0.66.86
• linux-image-gke - 4.15.0.1047.61
• linux-image-lowlatency-hwe-16.04 - 4.15.0.66.86
• linux-image-oem - 4.15.0.66.86
• linux-image-oracle - 4.15.0.1027.20
• linux-image-virtual-hwe-16.04 - 4.15.0.66.86

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-2018-21008
• CVE-2019-14814
• CVE-2019-14815
• CVE-2019-14816
• CVE-2019-14821
• CVE-2019-15117
• CVE-2019-15118
• CVE-2019-15505
• CVE-2019-15902
• CVE-2019-15918

Related notices

• USN-4162-2: linux-image-azure, linux-azure, linux-image-4.15.0-1061-azure
• USN-4163-2: linux-image-4.4.0-166-powerpc64-smp, linux-image-4.4.0-166-powerpc-smp, linux-aws, linux-image-aws, linux-image-4.4.0-166-powerpc-e500mc, linux-image-4.4.0-166-generic-lpae, linux-image-powerpc-e500mc-lts-xenial, linux-image-4.4.0-1056-aws, linux-image-4.4.0-166-powerpc64-emb, linux-image-powerpc-smp-lts-xenial, linux-image-generic-lts-xenial, linux-lts-xenial, linux-image-4.4.0-166-lowlatency, linux-image-virtual-lts-xenial, linux-image-4.4.0-166-generic, linux-image-lowlatency-lts-xenial, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lpae-lts-xenial
• USN-4163-1: linux-image-4.4.0-166-powerpc64-smp, linux-image-kvm, linux-image-4.4.0-166-powerpc-smp, linux-aws, linux-image-lowlatency-lts-vivid, linux-image-aws, linux-image-generic-lts-vivid, linux-image-4.4.0-166-powerpc-e500mc, linux-image-4.4.0-166-generic-lpae, linux-image-powerpc-smp, linux-image-powerpc64-emb-lts-wily, linux-image-4.4.0-1096-aws, linux-image-virtual, linux-image-virtual-lts-utopic, linux-image-powerpc-e500mc-lts-xenial, linux-image-powerpc64-emb-lts-utopic, linux-image-powerpc-smp-lts-wily, linux-image-generic-lpae-lts-wily, linux-image-lowlatency-lts-wily, linux-image-generic-lpae-lts-utopic, linux-image-powerpc64-smp-lts-wily, linux-image-powerpc64-emb-lts-vivid, linux-image-4.4.0-1128-snapdragon, linux-image-4.4.0-166-powerpc64-emb, linux-image-lowlatency, linux-image-lowlatency-lts-utopic, linux-image-powerpc64-smp-lts-vivid, linux-kvm, linux-image-powerpc-smp-lts-xenial, linux-image-generic-lts-xenial, linux-raspi2, linux, linux-image-generic-lpae-lts-vivid, linux-image-powerpc-e500mc-lts-utopic, linux-image-powerpc-smp-lts-vivid, linux-image-raspi2, linux-image-powerpc-e500mc-lts-wily, linux-image-snapdragon, linux-image-powerpc-e500mc-lts-vivid, linux-image-powerpc-smp-lts-utopic, linux-image-4.4.0-166-lowlatency, linux-image-generic-lpae, linux-image-generic-lts-utopic, linux-image-generic, linux-image-virtual-lts-wily, linux-image-virtual-lts-xenial, linux-image-powerpc64-emb, linux-snapdragon, linux-image-4.4.0-166-generic, linux-image-powerpc64-smp-lts-utopic, linux-image-4.4.0-1060-kvm, linux-image-lowlatency-lts-xenial, linux-image-virtual-lts-vivid, linux-image-powerpc64-smp-lts-xenial, linux-image-powerpc-e500mc, linux-image-4.4.0-1124-raspi2, linux-image-powerpc64-smp, linux-image-powerpc64-emb-lts-xenial, linux-image-generic-lts-wily, linux-image-generic-lpae-lts-xenial
• USN-4157-2: linux-gcp, linux-image-generic-lpae-hwe-18.04, linux-image-snapdragon-hwe-18.04, linux-image-virtual-hwe-18.04, linux-hwe, linux-image-generic-hwe-18.04, linux-gke-5.0, linux-image-gke-5.0, linux-image-5.0.0-32-generic-lpae, linux-image-5.0.0-1023-azure, linux-image-5.0.0-32-lowlatency, linux-image-5.0.0-32-generic, linux-azure, linux-image-azure, linux-image-5.0.0-1021-gcp, linux-image-gcp, linux-image-lowlatency-hwe-18.04, linux-image-5.0.0-1023-gke
• USN-4157-1: linux-image-5.0.0-1020-raspi2, linux-image-kvm, linux-aws, linux-image-5.0.0-1023-azure, linux-image-5.0.0-32-lowlatency, linux-image-aws, linux-image-azure, linux-image-gcp, linux-image-virtual, linux-image-5.0.0-32-generic-lpae, linux-image-gke, linux-kvm, linux-image-lowlatency, linux-raspi2, linux, linux-image-raspi2, linux-gcp, linux-image-snapdragon, linux-image-generic-lpae, linux-image-5.0.0-1021-gcp, linux-image-5.0.0-1019-aws, linux-image-generic, linux-snapdragon, linux-image-5.0.0-32-generic, linux-azure, linux-image-5.0.0-1020-kvm, linux-image-5.0.0-1024-snapdragon
• USN-4147-1: linux-image-generic-lpae-hwe-18.04, linux-image-5.0.0-31-generic, linux-image-kvm, linux-image-gke-5.0, linux-aws, linux-image-5.0.0-31-lowlatency, linux-image-aws, linux-image-virtual, linux-image-azure, linux-image-gcp, linux-image-5.0.0-1019-kvm, linux-image-5.0.0-1020-gke, linux-hwe, linux-image-gke, linux-kvm, linux-image-lowlatency, linux-raspi2, linux, linux-image-5.0.0-1019-raspi2, linux-image-raspi2, linux-gcp, linux-image-5.0.0-1023-snapdragon, linux-image-5.0.0-1018-aws, linux-image-snapdragon, linux-image-generic-hwe-18.04, linux-gke-5.0, linux-image-generic-lpae, linux-image-lowlatency-hwe-18.04, linux-image-generic, linux-snapdragon, linux-image-snapdragon-hwe-18.04, linux-image-virtual-hwe-18.04, linux-image-5.0.0-31-generic-lpae, linux-azure, linux-image-5.0.0-1022-azure, linux-image-5.0.0-1020-gcp