=========================================================================Ubuntu Security Notice USN-4144-1
October 01, 2019

linux, linux-aws, linux-aws-hwe, linux-azure, 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-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-hwe: Linux hardware enablement (HWE) kernel

Details:

It was discovered that the XFS file system in the Linux kernel did not
properly handle mount failures in some situations. A local attacker could
possibly use this to cause a denial of service (system crash) or execute
arbitrary code. (CVE-2018-20976)

Benjamin Moody discovered that the XFS file system in the Linux kernel did
not properly handle an error condition when out of disk quota. A local
attacker could possibly use this to cause a denial of service.
(CVE-2019-15538)

Update instructions:

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1026-oracle  4.15.0-1026.29
  linux-image-4.15.0-1047-kvm     4.15.0-1047.47
  linux-image-4.15.0-1048-raspi2  4.15.0-1048.52
  linux-image-4.15.0-1051-aws     4.15.0-1051.53
  linux-image-4.15.0-1057-oem     4.15.0-1057.66
  linux-image-4.15.0-1065-snapdragon  4.15.0-1065.72
  linux-image-4.15.0-65-generic   4.15.0-65.74
  linux-image-4.15.0-65-generic-lpae  4.15.0-65.74
  linux-image-4.15.0-65-lowlatency  4.15.0-65.74
  linux-image-aws                 4.15.0.1051.50
  linux-image-generic             4.15.0.65.67
  linux-image-generic-lpae        4.15.0.65.67
  linux-image-kvm                 4.15.0.1047.47
  linux-image-lowlatency          4.15.0.65.67
  linux-image-oem                 4.15.0.1057.61
  linux-image-oracle              4.15.0.1026.29
  linux-image-powerpc-e500mc      4.15.0.65.67
  linux-image-powerpc-smp         4.15.0.65.67
  linux-image-powerpc64-emb       4.15.0.65.67
  linux-image-powerpc64-smp       4.15.0.65.67
  linux-image-raspi2              4.15.0.1048.46
  linux-image-snapdragon          4.15.0.1065.68
  linux-image-virtual             4.15.0.65.67

Ubuntu 16.04 LTS:
  linux-image-4.15.0-1026-oracle  4.15.0-1026.29~16.04.1
  linux-image-4.15.0-1051-aws     4.15.0-1051.53~16.04.1
  linux-image-4.15.0-1060-azure   4.15.0-1060.65
  linux-image-4.15.0-65-generic   4.15.0-65.74~16.04.1
  linux-image-4.15.0-65-generic-lpae  4.15.0-65.74~16.04.1
  linux-image-4.15.0-65-lowlatency  4.15.0-65.74~16.04.1
  linux-image-aws-hwe             4.15.0.1051.51
  linux-image-azure               4.15.0.1060.63
  linux-image-generic-hwe-16.04   4.15.0.65.85
  linux-image-generic-lpae-hwe-16.04  4.15.0.65.85
  linux-image-lowlatency-hwe-16.04  4.15.0.65.85
  linux-image-oem                 4.15.0.65.85
  linux-image-oracle              4.15.0.1026.19
  linux-image-virtual-hwe-16.04   4.15.0.65.85

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://ubuntu.com/security/notices/USN-4144-1
  CVE-2018-20976, CVE-2019-15538

Package Information:
  https://launchpad.net/ubuntu/+source/linux/4.15.0-65.74
  https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1051.53
  https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1047.47
  https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1057.66
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1026.29
  https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1048.52
  https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1065.72
  https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1051.53~16.04.1
  https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1060.65
  https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-65.74~16.04.1
  https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1026.29~16.04.1

Ubuntu 4144-1: Linux kernel vulnerabilities

September 30, 2019
Several security issues were fixed in the Linux kernel.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1026-oracle 4.15.0-1026.29 linux-image-4.15.0-1047-kvm 4.15.0-1047.47 linux-image-4.15.0-1048-raspi2 4.15.0-1048.52 linux-image-4.15.0-1051-aws 4.15.0-1051.53 linux-image-4.15.0-1057-oem 4.15.0-1057.66 linux-image-4.15.0-1065-snapdragon 4.15.0-1065.72 linux-image-4.15.0-65-generic 4.15.0-65.74 linux-image-4.15.0-65-generic-lpae 4.15.0-65.74 linux-image-4.15.0-65-lowlatency 4.15.0-65.74 linux-image-aws 4.15.0.1051.50 linux-image-generic 4.15.0.65.67 linux-image-generic-lpae 4.15.0.65.67 linux-image-kvm 4.15.0.1047.47 linux-image-lowlatency 4.15.0.65.67 linux-image-oem 4.15.0.1057.61 linux-image-oracle 4.15.0.1026.29 linux-image-powerpc-e500mc 4.15.0.65.67 linux-image-powerpc-smp 4.15.0.65.67 linux-image-powerpc64-emb 4.15.0.65.67 linux-image-powerpc64-smp 4.15.0.65.67 linux-image-raspi2 4.15.0.1048.46 linux-image-snapdragon 4.15.0.1065.68 linux-image-virtual 4.15.0.65.67 Ubuntu 16.04 LTS: linux-image-4.15.0-1026-oracle 4.15.0-1026.29~16.04.1 linux-image-4.15.0-1051-aws 4.15.0-1051.53~16.04.1 linux-image-4.15.0-1060-azure 4.15.0-1060.65 linux-image-4.15.0-65-generic 4.15.0-65.74~16.04.1 linux-image-4.15.0-65-generic-lpae 4.15.0-65.74~16.04.1 linux-image-4.15.0-65-lowlatency 4.15.0-65.74~16.04.1 linux-image-aws-hwe 4.15.0.1051.51 linux-image-azure 4.15.0.1060.63 linux-image-generic-hwe-16.04 4.15.0.65.85 linux-image-generic-lpae-hwe-16.04 4.15.0.65.85 linux-image-lowlatency-hwe-16.04 4.15.0.65.85 linux-image-oem 4.15.0.65.85 linux-image-oracle 4.15.0.1026.19 linux-image-virtual-hwe-16.04 4.15.0.65.85 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://ubuntu.com/security/notices/USN-4144-1

CVE-2018-20976, CVE-2019-15538

Severity
October 01, 2019

Package Information

https://launchpad.net/ubuntu/+source/linux/4.15.0-65.74 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1051.53 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1047.47 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1057.66 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1026.29 https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1048.52 https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1065.72 https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1051.53~16.04.1 https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1060.65 https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-65.74~16.04.1 https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1026.29~16.04.1

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