USN-4095-1: Linux kernel vulnerabilities

linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities

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

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-kvm – Linux kernel for cloud environments
linux-raspi2 – Linux kernel for Raspberry Pi 2
linux-snapdragon – Linux kernel for Snapdragon processors

Details

Eli Biham and Lior Neumann discovered that the Bluetooth implementation in
the Linux kernel did not properly validate elliptic curve parameters during
Diffie-Hellman key exchange in some situations. An attacker could use this
to expose sensitive information. (CVE-2018-5383)

It was discovered that a heap buffer overflow existed in the Marvell
Wireless LAN device driver for the Linux kernel. An attacker could use this
to cause a denial of service (system crash) or possibly execute arbitrary
code. (CVE-2019-10126)

Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors
incorrectly handle SWAPGS instructions during speculative execution. A
local attacker could use this to expose sensitive information (kernel
memory). (CVE-2019-1125)

Jann Horn discovered that a race condition existed in the Linux kernel when
performing core dumps. A local attacker could use this to cause a denial of
service (system crash) or expose sensitive information. (CVE-2019-11599)

It was discovered that the PowerPC dlpar implementation in the Linux kernel
did not properly check for allocation errors in some situations. A local
attacker could possibly use this to cause a denial of service (system
crash). (CVE-2019-12614)

Jann Horn discovered that the ptrace implementation in the Linux kernel did
not properly record credentials in some situations. A local attacker could
use this to cause a denial of service (system crash) or possibly gain
administrative privileges. (CVE-2019-13272)

It was discovered that the Marvell Wireless LAN device driver in the Linux
kernel did not properly validate the BSS descriptor. A local attacker could
possibly use this to cause a denial of service (system crash) or possibly
execute arbitrary code. (CVE-2019-3846)

Update instructions

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

Ubuntu 16.04 LTS: linux-image-4.4.0-1054-kvm – 4.4.0-1054.61; linux-image-4.4.0-1090-aws – 4.4.0-1090.101; linux-image-4.4.0-1118-raspi2 – 4.4.0-1118.127; linux-image-4.4.0-1122-snapdragon – 4.4.0-1122.128; linux-image-4.4.0-159-generic – 4.4.0-159.187; linux-image-4.4.0-159-generic-lpae – 4.4.0-159.187; linux-image-4.4.0-159-lowlatency – 4.4.0-159.187; linux-image-4.4.0-159-powerpc-e500mc – 4.4.0-159.187; linux-image-4.4.0-159-powerpc-smp – 4.4.0-159.187; linux-image-4.4.0-159-powerpc64-emb – 4.4.0-159.187; linux-image-4.4.0-159-powerpc64-smp – 4.4.0-159.187; linux-image-aws – 4.4.0.1090.94; linux-image-generic – 4.4.0.159.167; linux-image-generic-lpae – 4.4.0.159.167; linux-image-kvm – 4.4.0.1054.54; linux-image-lowlatency – 4.4.0.159.167; linux-image-powerpc-e500mc – 4.4.0.159.167; linux-image-powerpc-smp – 4.4.0.159.167; linux-image-powerpc64-emb – 4.4.0.159.167; linux-image-powerpc64-smp – 4.4.0.159.167; linux-image-raspi2 – 4.4.0.1118.118; linux-image-snapdragon – 4.4.0.1122.114; linux-image-virtual – 4.4.0.159.167

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-4095-1: Linux kernel vulnerabilities

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