USN-4345-1: Linux kernel vulnerabilities

linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-hwe, linux-kvm, linux-oem, linux-oracle, linux-raspi2, linux-snapdragon vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

Ubuntu 18.04 LTS
Ubuntu 16.04 LTS

Summary

Several security issues were fixed in the Linux kernel.

Software Description

linux – Linux kernel
linux-aws – Linux kernel for Amazon Web Services (AWS) systems
linux-gke-4.15 – Linux kernel for Google Container Engine (GKE) systems
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
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-hwe – Linux hardware enablement (HWE) kernel

Details

Al Viro discovered that the Linux kernel for s390x systems did not properly
perform page table upgrades for kernel sections that use secondary address
mode. A local attacker could use this to cause a denial of service (system
crash) or execute arbitrary code. (CVE-2020-11884)

It was discovered that the Intel Wi-Fi driver in the Linux kernel did not
properly check for errors in some situations. A local attacker could
possibly use this to cause a denial of service (system crash).
(CVE-2019-16234)

Tristan Madani discovered that the block I/O tracing implementation in the
Linux kernel contained a race condition. A local attacker could use this to
cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2019-19768)

It was discovered that the vhost net driver in the Linux kernel contained a
stack buffer overflow. A local attacker with the ability to perform ioctl()
calls on /dev/vhost-net could use this to cause a denial of service (system
crash). (CVE-2020-10942)

It was discovered that the OV51x USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11608)

It was discovered that the STV06XX USB Camera device driver in the Linux
kernel did not properly validate device metadata. A physically proximate
attacker could use this to cause a denial of service (system crash).
(CVE-2020-11609)

It was discovered that the Xirlink C-It USB Camera device driver in the
Linux kernel did not properly validate device metadata. A physically
proximate attacker could use this to cause a denial of service (system
crash). (CVE-2020-11668)

It was discovered that the virtual terminal implementation in the Linux
kernel contained a race condition. A local attacker could possibly use this
to cause a denial of service (system crash) or expose sensitive
information. (CVE-2020-8648)

Jordy Zomer discovered that the floppy driver in the Linux kernel did not
properly check for errors in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
expose sensitive information. (CVE-2020-9383)

Update instructions

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

Ubuntu 18.04 LTS: linux-image-4.15.0-1038-oracle – 4.15.0-1038.42; linux-image-4.15.0-1058-gke – 4.15.0-1058.61; linux-image-4.15.0-1059-kvm – 4.15.0-1059.60; linux-image-4.15.0-1061-raspi2 – 4.15.0-1061.65; linux-image-4.15.0-1066-aws – 4.15.0-1066.70; linux-image-4.15.0-1077-snapdragon – 4.15.0-1077.84; linux-image-4.15.0-1080-oem – 4.15.0-1080.90; linux-image-4.15.0-99-generic – 4.15.0-99.100; linux-image-4.15.0-99-generic-lpae – 4.15.0-99.100; linux-image-4.15.0-99-lowlatency – 4.15.0-99.100; linux-image-aws-lts-18.04 – 4.15.0.1066.69; linux-image-generic – 4.15.0.99.89; linux-image-generic-lpae – 4.15.0.99.89; linux-image-gke – 4.15.0.1058.62; linux-image-gke-4.15 – 4.15.0.1058.62; linux-image-kvm – 4.15.0.1059.59; linux-image-lowlatency – 4.15.0.99.89; linux-image-oem – 4.15.0.1080.84; linux-image-oracle-lts-18.04 – 4.15.0.1038.47; linux-image-powerpc-e500mc – 4.15.0.99.89; linux-image-powerpc-smp – 4.15.0.99.89; linux-image-powerpc64-emb – 4.15.0.99.89; linux-image-powerpc64-smp – 4.15.0.99.89; linux-image-raspi2 – 4.15.0.1061.59; linux-image-snapdragon – 4.15.0.1077.80; linux-image-virtual – 4.15.0.99.89
Ubuntu 16.04 LTS: linux-image-4.15.0-1038-oracle – 4.15.0-1038.42~16.04.1; linux-image-4.15.0-1061-gcp – 4.15.0-1061.65; linux-image-4.15.0-1066-aws – 4.15.0-1066.70~16.04.1; linux-image-4.15.0-1082-azure – 4.15.0-1082.92~16.04.1; linux-image-4.15.0-99-generic – 4.15.0-99.100~16.04.1; linux-image-4.15.0-99-generic-lpae – 4.15.0-99.100~16.04.1; linux-image-4.15.0-99-lowlatency – 4.15.0-99.100~16.04.1; linux-image-aws-hwe – 4.15.0.1066.66; linux-image-azure – 4.15.0.1082.81; linux-image-azure-edge – 4.15.0.1082.81; linux-image-gcp – 4.15.0.1061.75; linux-image-generic-hwe-16.04 – 4.15.0.99.106; linux-image-generic-lpae-hwe-16.04 – 4.15.0.99.106; linux-image-gke – 4.15.0.1061.75; linux-image-lowlatency-hwe-16.04 – 4.15.0.99.106; linux-image-oem – 4.15.0.99.106; linux-image-oracle – 4.15.0.1038.31; linux-image-virtual-hwe-16.04 – 4.15.0.99.106

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

Source: USN-4345-1: Linux kernel vulnerabilities

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