[USN-4041-1] Linux kernel update

Seth Arnold seth.arnold at canonical.com
Sat Jun 29 05:29:09 UTC 2019 

==========================================================================
Ubuntu Security Notice USN-4041-1
June 29, 2019

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 update
==========================================================================

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

- Ubuntu 19.04
- Ubuntu 18.10
- 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-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:

USN-4017-1 fixed vulnerabilities in the Linux kernel for Ubuntu.
Unfortunately, the update introduced a regression that interfered with
networking applications that setup very low SO_SNDBUF values. This
update fixes the problem.

We apologize for the inconvenience.

Jonathan Looney discovered that the Linux kernel could be coerced into
segmenting responses into multiple TCP segments. A remote attacker could
construct an ongoing sequence of requests to cause a denial of service.

Update instructions:

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

Ubuntu 19.04:
  linux-image-5.0.0-1010-aws      5.0.0-1010.11
  linux-image-5.0.0-1010-azure    5.0.0-1010.10
  linux-image-5.0.0-1010-gcp      5.0.0-1010.10
  linux-image-5.0.0-1010-kvm      5.0.0-1010.11
  linux-image-5.0.0-1012-raspi2   5.0.0-1012.12
  linux-image-5.0.0-1016-snapdragon  5.0.0-1016.17
  linux-image-5.0.0-20-generic    5.0.0-20.21
  linux-image-5.0.0-20-generic-lpae  5.0.0-20.21
  linux-image-5.0.0-20-lowlatency  5.0.0-20.21
  linux-image-aws                 5.0.0.1010.10
  linux-image-azure               5.0.0.1010.9
  linux-image-gcp                 5.0.0.1010.10
  linux-image-generic             5.0.0.20.21
  linux-image-generic-lpae        5.0.0.20.21
  linux-image-gke                 5.0.0.1010.10
  linux-image-kvm                 5.0.0.1010.10
  linux-image-lowlatency          5.0.0.20.21
  linux-image-raspi2              5.0.0.1012.9
  linux-image-snapdragon          5.0.0.1016.9
  linux-image-virtual             5.0.0.20.21

Ubuntu 18.10:
  linux-image-4.18.0-1015-gcp     4.18.0-1015.16
  linux-image-4.18.0-1016-kvm     4.18.0-1016.17
  linux-image-4.18.0-1018-raspi2  4.18.0-1018.21
  linux-image-4.18.0-1020-aws     4.18.0-1020.24
  linux-image-4.18.0-1023-azure   4.18.0-1023.24
  linux-image-4.18.0-25-generic   4.18.0-25.26
  linux-image-4.18.0-25-generic-lpae  4.18.0-25.26
  linux-image-4.18.0-25-lowlatency  4.18.0-25.26
  linux-image-4.18.0-25-snapdragon  4.18.0-25.26
  linux-image-aws                 4.18.0.1020.20
  linux-image-azure               4.18.0.1023.25
  linux-image-gcp                 4.18.0.1015.15
  linux-image-generic             4.18.0.25.26
  linux-image-generic-lpae        4.18.0.25.26
  linux-image-gke                 4.18.0.1015.15
  linux-image-kvm                 4.18.0.1016.16
  linux-image-lowlatency          4.18.0.25.26
  linux-image-powerpc-e500mc      4.18.0.25.26
  linux-image-powerpc-smp         4.18.0.25.26
  linux-image-powerpc64-emb       4.18.0.25.26
  linux-image-powerpc64-smp       4.18.0.25.26
  linux-image-raspi2              4.18.0.1018.15
  linux-image-snapdragon          4.18.0.25.26
  linux-image-virtual             4.18.0.25.26

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1017-oracle  4.15.0-1017.19
  linux-image-4.15.0-1036-gcp     4.15.0-1036.38
  linux-image-4.15.0-1036-gke     4.15.0-1036.38
  linux-image-4.15.0-1038-kvm     4.15.0-1038.38
  linux-image-4.15.0-1040-raspi2  4.15.0-1040.43
  linux-image-4.15.0-1043-aws     4.15.0-1043.45
  linux-image-4.15.0-1045-oem     4.15.0-1045.50
  linux-image-4.15.0-1057-snapdragon  4.15.0-1057.62
  linux-image-4.15.0-54-generic   4.15.0-54.58
  linux-image-4.15.0-54-generic-lpae  4.15.0-54.58
  linux-image-4.15.0-54-lowlatency  4.15.0-54.58
  linux-image-4.18.0-1023-azure   4.18.0-1023.24~18.04.1
  linux-image-4.18.0-25-generic   4.18.0-25.26~18.04.1
  linux-image-4.18.0-25-generic-lpae  4.18.0-25.26~18.04.1
  linux-image-4.18.0-25-lowlatency  4.18.0-25.26~18.04.1
  linux-image-4.18.0-25-snapdragon  4.18.0-25.26~18.04.1
  linux-image-aws                 4.15.0.1043.42
  linux-image-azure               4.18.0.1023.21
  linux-image-gcp                 4.15.0.1036.38
  linux-image-generic             4.15.0.54.56
  linux-image-generic-hwe-18.04   4.18.0.25.74
  linux-image-generic-lpae        4.15.0.54.56
  linux-image-generic-lpae-hwe-18.04  4.18.0.25.74
  linux-image-gke                 4.15.0.1036.39
  linux-image-gke-4.15            4.15.0.1036.39
  linux-image-kvm                 4.15.0.1038.38
  linux-image-lowlatency          4.15.0.54.56
  linux-image-lowlatency-hwe-18.04  4.18.0.25.74
  linux-image-oem                 4.15.0.1045.49
  linux-image-oracle              4.15.0.1017.20
  linux-image-powerpc-e500mc      4.15.0.54.56
  linux-image-powerpc-smp         4.15.0.54.56
  linux-image-powerpc64-emb       4.15.0.54.56
  linux-image-powerpc64-smp       4.15.0.54.56
  linux-image-raspi2              4.15.0.1040.38
  linux-image-snapdragon          4.15.0.1057.60
  linux-image-snapdragon-hwe-18.04  4.18.0.25.74
  linux-image-virtual             4.15.0.54.56
  linux-image-virtual-hwe-18.04   4.18.0.25.74

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1017-oracle  4.15.0-1017.19~16.04.2
  linux-image-4.15.0-1036-gcp     4.15.0-1036.38~16.04.1
  linux-image-4.15.0-1043-aws     4.15.0-1043.45~16.04.1
  linux-image-4.15.0-1049-azure   4.15.0-1049.54
  linux-image-4.15.0-54-generic   4.15.0-54.58~16.04.1
  linux-image-4.15.0-54-generic-lpae  4.15.0-54.58~16.04.1
  linux-image-4.15.0-54-lowlatency  4.15.0-54.58~16.04.1
  linux-image-4.4.0-1051-kvm      4.4.0-1051.58
  linux-image-4.4.0-1087-aws      4.4.0-1087.98
  linux-image-4.4.0-1114-raspi2   4.4.0-1114.123
  linux-image-4.4.0-1118-snapdragon  4.4.0-1118.124
  linux-image-4.4.0-154-generic   4.4.0-154.181
  linux-image-4.4.0-154-generic-lpae  4.4.0-154.181
  linux-image-4.4.0-154-lowlatency  4.4.0-154.181
  linux-image-4.4.0-154-powerpc-e500mc  4.4.0-154.181
  linux-image-4.4.0-154-powerpc-smp  4.4.0-154.181
  linux-image-4.4.0-154-powerpc64-emb  4.4.0-154.181
  linux-image-4.4.0-154-powerpc64-smp  4.4.0-154.181
  linux-image-aws                 4.4.0.1087.90
  linux-image-aws-hwe             4.15.0.1043.43
  linux-image-azure               4.15.0.1049.52
  linux-image-gcp                 4.15.0.1036.50
  linux-image-generic             4.4.0.154.162
  linux-image-generic-hwe-16.04   4.15.0.54.75
  linux-image-generic-lpae        4.4.0.154.162
  linux-image-generic-lpae-hwe-16.04  4.15.0.54.75
  linux-image-gke                 4.15.0.1036.50
  linux-image-kvm                 4.4.0.1051.51
  linux-image-lowlatency          4.4.0.154.162
  linux-image-lowlatency-hwe-16.04  4.15.0.54.75
  linux-image-oem                 4.15.0.54.75
  linux-image-oracle              4.15.0.1017.11
  linux-image-powerpc-e500mc      4.4.0.154.162
  linux-image-powerpc-smp         4.4.0.154.162
  linux-image-powerpc64-emb       4.4.0.154.162
  linux-image-powerpc64-smp       4.4.0.154.162
  linux-image-raspi2              4.4.0.1114.114
  linux-image-snapdragon          4.4.0.1118.110
  linux-image-virtual             4.4.0.154.162
  linux-image-virtual-hwe-16.04   4.15.0.54.75

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:
  https://usn.ubuntu.com/4041-1
  CVE-2019-11479, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/SACKPanic

Package Information:
  https://launchpad.net/ubuntu/+source/linux/5.0.0-20.21
  https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1010.11
  https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1010.10
  https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1010.10
  https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1010.11
  https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1012.12
  https://launchpad.net/ubuntu/+source/linux-snapdragon/5.0.0-1016.17
  https://launchpad.net/ubuntu/+source/linux/4.18.0-25.26
  https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1020.24
  https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1023.24
  https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1015.16
  https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1016.17
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1018.21
  https://launchpad.net/ubuntu/+source/linux/4.15.0-54.58
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1043.45
  https://launchpad.net/ubuntu/+source/linux-azure/4.18.0-1023.24~18.04.1
  https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1036.38
  https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1036.38
  https://launchpad.net/ubuntu/+source/linux-hwe/4.18.0-25.26~18.04.1
  https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1038.38
  https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1045.50
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1017.19
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1040.43
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1057.62
  https://launchpad.net/ubuntu/+source/linux/4.4.0-154.181
  https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1087.98
  https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1043.45~16.04.1
  https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1049.54
  https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1036.38~16.04.1
  https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-54.58~16.04.1
  https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1051.58
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1017.19~16.04.2
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1114.123
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1118.124

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