Ubuntu 4144-1: Linux kernel vulnerabilities

    Date30 Sep 2019
    CategoryUbuntu
    367
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    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://usn.ubuntu.com/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
    
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