Ubuntu 4319-1: Linux kernel vulnerabilities

    Date 06 Apr 2020
    447
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4319-1
    April 06, 2020
    
    linux, linux-aws, linux-gcp, linux-gcp-5.3, linux-hwe, linux-kvm,
    linux-oracle, linux-oracle-5.3, linux-raspi2, linux-raspi2-5.3
    vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.10
    - Ubuntu 18.04 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-kvm: Linux kernel for cloud environments
    - linux-oracle: Linux kernel for Oracle Cloud systems
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    - linux-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-hwe: Linux hardware enablement (HWE) kernel
    - linux-oracle-5.3: Linux kernel Oracle Cloud systems
    - linux-raspi2-5.3: Linux kernel for Raspberry Pi 2
    
    Details:
    
    It was discovered that the IPMI message handler implementation in the Linux
    kernel did not properly deallocate memory in certain situations. A local
    attacker could use this to cause a denial of service (kernel memory
    exhaustion). (CVE-2019-19046)
    
    Al Viro discovered that the vfs layer in the Linux kernel contained a use-
    after-free vulnerability. A local attacker could use this to cause a denial
    of service (system crash) or possibly expose sensitive information (kernel
    memory). (CVE-2020-8428)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      linux-image-5.3.0-1014-oracle   5.3.0-1014.15
      linux-image-5.3.0-1015-kvm      5.3.0-1015.16
      linux-image-5.3.0-1016-aws      5.3.0-1016.17
      linux-image-5.3.0-1017-gcp      5.3.0-1017.18
      linux-image-5.3.0-1022-raspi2   5.3.0-1022.24
      linux-image-5.3.0-46-generic    5.3.0-46.38
      linux-image-5.3.0-46-generic-lpae  5.3.0-46.38
      linux-image-5.3.0-46-lowlatency  5.3.0-46.38
      linux-image-5.3.0-46-snapdragon  5.3.0-46.38
      linux-image-aws                 5.3.0.1016.18
      linux-image-gcp                 5.3.0.1017.18
      linux-image-generic             5.3.0.46.39
      linux-image-generic-lpae        5.3.0.46.39
      linux-image-gke                 5.3.0.1017.18
      linux-image-kvm                 5.3.0.1015.17
      linux-image-lowlatency          5.3.0.46.39
      linux-image-oracle              5.3.0.1014.15
      linux-image-raspi2              5.3.0.1022.19
      linux-image-snapdragon          5.3.0.46.39
      linux-image-virtual             5.3.0.46.39
    
    Ubuntu 18.04 LTS:
      linux-image-5.3.0-1014-oracle   5.3.0-1014.15~18.04.1
      linux-image-5.3.0-1017-gcp      5.3.0-1017.18~18.04.1
      linux-image-5.3.0-1022-raspi2   5.3.0-1022.24~18.04.1
      linux-image-5.3.0-46-generic    5.3.0-46.38~18.04.1
      linux-image-5.3.0-46-generic-lpae  5.3.0-46.38~18.04.1
      linux-image-5.3.0-46-lowlatency  5.3.0-46.38~18.04.1
      linux-image-gcp-edge            5.3.0.1017.16
      linux-image-generic-hwe-18.04   5.3.0.46.102
      linux-image-generic-lpae-hwe-18.04  5.3.0.46.102
      linux-image-lowlatency-hwe-18.04  5.3.0.46.102
      linux-image-oracle-edge         5.3.0.1014.13
      linux-image-raspi2-hwe-18.04    5.3.0.1022.11
      linux-image-snapdragon-hwe-18.04  5.3.0.46.102
      linux-image-virtual-hwe-18.04   5.3.0.46.102
    
    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/4319-1
      CVE-2019-19046, CVE-2020-8428
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/5.3.0-46.38
      https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1016.17
      https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1017.18
      https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1015.16
      https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1014.15
      https://launchpad.net/ubuntu/+source/linux-raspi2/5.3.0-1022.24
      https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1017.18~18.04.1
      https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-46.38~18.04.1
      https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1014.15~18.04.1
      https://launchpad.net/ubuntu/+source/linux-raspi2-5.3/5.3.0-1022.24~18.04.1
    

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