Linux Security
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    Linux Security

    Ubuntu 4209-1: Linux kernel vulnerabilities

    Date
    328
    Posted By
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4209-1
    December 02, 2019
    
    linux, linux-aws, linux-aws-5.0, linux-gcp, linux-gke-5.0, linux-hwe,
    linux-kvm, linux-oem-osp1, linux-oracle, linux-oracle-5.0, linux-raspi2
    vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 19.04
    - 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-aws-5.0: Linux kernel for Amazon Web Services (AWS) systems
    - linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems
    - linux-hwe: Linux hardware enablement (HWE) kernel
    - linux-oem-osp1: Linux kernel for OEM processors
    - linux-oracle-5.0: Linux kernel for Oracle Cloud systems
    
    Details:
    
    Jann Horn discovered that the OverlayFS and ShiftFS Drivers in the Linux
    kernel did not properly handle reference counting during memory mapping
    operations when used in conjunction with AUFS. A local attacker could use
    this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2019-15794)
    
    It was discovered that a buffer overflow existed in the 802.11 Wi-Fi
    configuration interface for the Linux kernel when handling beacon settings.
    A local attacker could use this to cause a denial of service (system crash)
    or possibly execute arbitrary code. (CVE-2019-16746)
    
    It was discovered that there was a memory leak in the Advanced Buffer
    Management functionality of the Netronome NFP4000/NFP6000 NIC Driver in the
    Linux kernel during certain error scenarios. A local attacker could use
    this to cause a denial of service (memory exhaustion). (CVE-2019-19076)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.04:
      linux-image-5.0.0-1008-oracle   5.0.0-1008.13
      linux-image-5.0.0-1022-aws      5.0.0-1022.25
      linux-image-5.0.0-1023-kvm      5.0.0-1023.25
      linux-image-5.0.0-1023-raspi2   5.0.0-1023.24
      linux-image-5.0.0-1026-gcp      5.0.0-1026.27
      linux-image-5.0.0-37-generic    5.0.0-37.40
      linux-image-5.0.0-37-generic-lpae  5.0.0-37.40
      linux-image-5.0.0-37-lowlatency  5.0.0-37.40
      linux-image-aws                 5.0.0.1022.24
      linux-image-gcp                 5.0.0.1026.51
      linux-image-generic             5.0.0.37.39
      linux-image-generic-lpae        5.0.0.37.39
      linux-image-gke                 5.0.0.1026.51
      linux-image-kvm                 5.0.0.1023.24
      linux-image-lowlatency          5.0.0.37.39
      linux-image-oracle              5.0.0.1008.34
      linux-image-raspi2              5.0.0.1023.21
      linux-image-virtual             5.0.0.37.39
    
    Ubuntu 18.04 LTS:
      linux-image-5.0.0-1008-oracle   5.0.0-1008.13~18.04.1
      linux-image-5.0.0-1022-aws      5.0.0-1022.25~18.04.1
      linux-image-5.0.0-1026-gcp      5.0.0-1026.27~18.04.1
      linux-image-5.0.0-1026-gke      5.0.0-1026.27~18.04.2
      linux-image-5.0.0-1030-oem-osp1  5.0.0-1030.34
      linux-image-5.0.0-37-generic    5.0.0-37.40~18.04.1
      linux-image-5.0.0-37-generic-lpae  5.0.0-37.40~18.04.1
      linux-image-5.0.0-37-lowlatency  5.0.0-37.40~18.04.1
      linux-image-aws-edge            5.0.0.1022.36
      linux-image-gcp                 5.0.0.1026.30
      linux-image-generic-hwe-18.04   5.0.0.37.95
      linux-image-generic-lpae-hwe-18.04  5.0.0.37.95
      linux-image-gke-5.0             5.0.0.1026.15
      linux-image-lowlatency-hwe-18.04  5.0.0.37.95
      linux-image-oem-osp1            5.0.0.1030.34
      linux-image-oracle-edge         5.0.0.1008.7
      linux-image-snapdragon-hwe-18.04  5.0.0.37.95
      linux-image-virtual-hwe-18.04   5.0.0.37.95
    
    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/4209-1
      CVE-2019-15794, CVE-2019-16746, CVE-2019-19076
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/5.0.0-37.40
      https://launchpad.net/ubuntu/+source/linux-aws/5.0.0-1022.25
      https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1026.27
      https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1023.25
      https://launchpad.net/ubuntu/+source/linux-oracle/5.0.0-1008.13
      https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1023.24
      https://launchpad.net/ubuntu/+source/linux-aws-5.0/5.0.0-1022.25~18.04.1
      https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1026.27~18.04.1
      https://launchpad.net/ubuntu/+source/linux-gke-5.0/5.0.0-1026.27~18.04.2
      https://launchpad.net/ubuntu/+source/linux-hwe/5.0.0-37.40~18.04.1
      https://launchpad.net/ubuntu/+source/linux-oem-osp1/5.0.0-1030.34
      https://launchpad.net/ubuntu/+source/linux-oracle-5.0/5.0.0-1008.13~18.04.1
    

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