USN-4135-1: Linux kernel vulnerabilities

USN-4135-1: Linux kernel vulnerabilities

linux, linux-aws, linux-aws-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-gke-5.0, 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 19.04
• 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-azure – Linux kernel for Microsoft Azure Cloud systems
• linux-gcp – Linux kernel for Google Cloud Platform (GCP) systems
• linux-kvm – Linux kernel for cloud environments
• linux-raspi2 – Linux kernel for Raspberry Pi 2
• linux-snapdragon – Linux kernel for Snapdragon processors
• linux-gke-4.15 – Linux kernel for Google Container Engine (GKE) systems
• linux-gke-5.0 – Linux kernel for Google Container Engine (GKE) systems
• linux-hwe – Linux hardware enablement (HWE) kernel
• linux-oem – Linux kernel for OEM processors
• linux-oracle – Linux kernel for Oracle Cloud systems
• linux-aws-hwe – Linux kernel for Amazon Web Services (AWS-HWE) systems

Details

Peter Pi discovered a buffer overflow in the virtio network backend
(vhost_net) implementation in the Linux kernel. An attacker in a guest may
be able to use this to cause a denial of service (host OS crash) or
possibly execute arbitrary code in the host OS. (CVE-2019-14835)

It was discovered that the Linux kernel on PowerPC architectures did not
properly handle Facility Unavailable exceptions in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15030)

It was discovered that the Linux kernel on PowerPC architectures did not
properly handle exceptions on interrupts in some situations. A local
attacker could use this to expose sensitive information. (CVE-2019-15031)

Update instructions

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

Ubuntu 19.04

linux-image-5.0.0-1016-aws – 5.0.0-1016.18

linux-image-5.0.0-1017-gcp – 5.0.0-1017.17

linux-image-5.0.0-1017-kvm – 5.0.0-1017.18

linux-image-5.0.0-1017-raspi2 – 5.0.0-1017.17

linux-image-5.0.0-1020-azure – 5.0.0-1020.21

linux-image-5.0.0-1021-snapdragon – 5.0.0-1021.22

linux-image-5.0.0-29-generic – 5.0.0-29.31

linux-image-5.0.0-29-generic-lpae – 5.0.0-29.31

linux-image-5.0.0-29-lowlatency – 5.0.0-29.31

linux-image-aws – 5.0.0.1016.17

linux-image-azure – 5.0.0.1020.19

linux-image-gcp – 5.0.0.1017.43

linux-image-generic – 5.0.0.29.30

linux-image-generic-lpae – 5.0.0.29.30

linux-image-gke – 5.0.0.1017.43

linux-image-kvm – 5.0.0.1017.17

linux-image-lowlatency – 5.0.0.29.30

linux-image-raspi2 – 5.0.0.1017.14

linux-image-snapdragon – 5.0.0.1021.14

linux-image-virtual – 5.0.0.29.30

Ubuntu 18.04 LTS

linux-image-4.15.0-1025-oracle – 4.15.0-1025.28

linux-image-4.15.0-1044-gcp – 4.15.0-1044.70

linux-image-4.15.0-1044-gke – 4.15.0-1044.46

linux-image-4.15.0-1046-kvm – 4.15.0-1046.46

linux-image-4.15.0-1047-raspi2 – 4.15.0-1047.51

linux-image-4.15.0-1050-aws – 4.15.0-1050.52

linux-image-4.15.0-1056-oem – 4.15.0-1056.65

linux-image-4.15.0-1064-snapdragon – 4.15.0-1064.71

linux-image-4.15.0-64-generic – 4.15.0-64.73

linux-image-4.15.0-64-generic-lpae – 4.15.0-64.73

linux-image-4.15.0-64-lowlatency – 4.15.0-64.73

linux-image-5.0.0-1017-gke – 5.0.0-1017.17~18.04.1

linux-image-5.0.0-1020-azure – 5.0.0-1020.21~18.04.1

linux-image-5.0.0-29-generic – 5.0.0-29.31~18.04.1

linux-image-5.0.0-29-generic-lpae – 5.0.0-29.31~18.04.1

linux-image-5.0.0-29-lowlatency – 5.0.0-29.31~18.04.1

linux-image-aws – 4.15.0.1050.49

linux-image-azure – 5.0.0.1020.30

linux-image-gcp – 4.15.0.1044.70

linux-image-generic – 4.15.0.64.66

linux-image-generic-hwe-18.04 – 5.0.0.29.86

linux-image-generic-lpae – 4.15.0.64.66

linux-image-generic-lpae-hwe-18.04 – 5.0.0.29.86

linux-image-gke – 4.15.0.1044.47

linux-image-gke-4.15 – 4.15.0.1044.47

linux-image-gke-5.0 – 5.0.0.1017.7

linux-image-kvm – 4.15.0.1046.46

linux-image-lowlatency – 4.15.0.64.66

linux-image-lowlatency-hwe-18.04 – 5.0.0.29.86

linux-image-oem – 4.15.0.1056.60

linux-image-oracle – 4.15.0.1025.28

linux-image-powerpc-e500mc – 4.15.0.64.66

linux-image-powerpc-smp – 4.15.0.64.66

linux-image-powerpc64-emb – 4.15.0.64.66

linux-image-powerpc64-smp – 4.15.0.64.66

linux-image-raspi2 – 4.15.0.1047.45

linux-image-snapdragon – 4.15.0.1064.67

linux-image-snapdragon-hwe-18.04 – 5.0.0.29.86

linux-image-virtual – 4.15.0.64.66

linux-image-virtual-hwe-18.04 – 5.0.0.29.86

Ubuntu 16.04 LTS

linux-image-4.15.0-1025-oracle – 4.15.0-1025.28~16.04.1

linux-image-4.15.0-1044-gcp – 4.15.0-1044.46

linux-image-4.15.0-1050-aws – 4.15.0-1050.52~16.04.1

linux-image-4.15.0-1059-azure – 4.15.0-1059.64

linux-image-4.15.0-64-generic – 4.15.0-64.73~16.04.1

linux-image-4.15.0-64-generic-lpae – 4.15.0-64.73~16.04.1

linux-image-4.15.0-64-lowlatency – 4.15.0-64.73~16.04.1

linux-image-4.4.0-1058-kvm – 4.4.0-1058.65

linux-image-4.4.0-1094-aws – 4.4.0-1094.105

linux-image-4.4.0-1122-raspi2 – 4.4.0-1122.131

linux-image-4.4.0-1126-snapdragon – 4.4.0-1126.132

linux-image-4.4.0-164-generic – 4.4.0-164.192

linux-image-4.4.0-164-generic-lpae – 4.4.0-164.192

linux-image-4.4.0-164-lowlatency – 4.4.0-164.192

linux-image-4.4.0-164-powerpc-e500mc – 4.4.0-164.192

linux-image-4.4.0-164-powerpc-smp – 4.4.0-164.192

linux-image-4.4.0-164-powerpc64-emb – 4.4.0-164.192

linux-image-4.4.0-164-powerpc64-smp – 4.4.0-164.192

linux-image-aws – 4.4.0.1094.98

linux-image-aws-hwe – 4.15.0.1050.50

linux-image-azure – 4.15.0.1059.62

linux-image-gcp – 4.15.0.1044.58

linux-image-generic – 4.4.0.164.172

linux-image-generic-hwe-16.04 – 4.15.0.64.84

linux-image-generic-lpae – 4.4.0.164.172

linux-image-generic-lpae-hwe-16.04 – 4.15.0.64.84

linux-image-gke – 4.15.0.1044.58

linux-image-kvm – 4.4.0.1058.58

linux-image-lowlatency – 4.4.0.164.172

linux-image-lowlatency-hwe-16.04 – 4.15.0.64.84

linux-image-oem – 4.15.0.64.84

linux-image-oracle – 4.15.0.1025.18

linux-image-powerpc-e500mc – 4.4.0.164.172

linux-image-powerpc-smp – 4.4.0.164.172

linux-image-powerpc64-emb – 4.4.0.164.172

linux-image-powerpc64-smp – 4.4.0.164.172

linux-image-raspi2 – 4.4.0.1122.122

linux-image-snapdragon – 4.4.0.1126.118

linux-image-virtual – 4.4.0.164.172

linux-image-virtual-hwe-16.04 – 4.15.0.64.84

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

• CVE-2019-14835
• CVE-2019-15030
• CVE-2019-15031

Source: USN-4135-1: Linux kernel vulnerabilities