Ubuntu 4369-1: Linux kernel vulnerabilities

    Date 20 May 2020
    296
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4369-1
    May 21, 2020
    
    linux, linux-aws, linux-aws-5.3, linux-gcp, linux-gcp-5.3, linux-gke-5.3,
    linux-hwe, linux-kvm, linux-oracle, linux-oracle-5.3, linux-raspi2
    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 (V7) systems
    - linux-aws-5.3: Linux kernel for Amazon Web Services (AWS) systems
    - linux-gcp-5.3: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-gke-5.3: Linux kernel for Google Container Engine (GKE) systems
    - linux-hwe: Linux hardware enablement (HWE) kernel
    - linux-oracle-5.3: Linux kernel for Oracle Cloud systems
    
    Details:
    
    It was discovered that the btrfs implementation in the Linux kernel did not
    properly detect that a block was marked dirty in some situations. An
    attacker could use this to specially craft a file system image that, when
    unmounted, could cause a denial of service (system crash). (CVE-2019-19377)
    
    Tristan Madani discovered that the file locking implementation in the Linux
    kernel contained a race condition. A local attacker could possibly use this
    to cause a denial of service or expose sensitive information.
    (CVE-2019-19769)
    
    It was discovered that the Serial CAN interface driver in the Linux kernel
    did not properly initialize data. A local attacker could use this to expose
    sensitive information (kernel memory). (CVE-2020-11494)
    
    It was discovered that the linux kernel did not properly validate certain
    mount options to the tmpfs virtual memory file system. A local attacker
    with the ability to specify mount options could use this to cause a denial
    of service (system crash). (CVE-2020-11565)
    
    It was discovered that the OV51x USB Camera device driver in the Linux
    kernel did not properly validate device metadata. A physically proximate
    attacker could use this to cause a denial of service (system crash).
    (CVE-2020-11608)
    
    It was discovered that the STV06XX USB Camera device driver in the Linux
    kernel did not properly validate device metadata. A physically proximate
    attacker could use this to cause a denial of service (system crash).
    (CVE-2020-11609)
    
    It was discovered that the Xirlink C-It USB Camera device driver in the
    Linux kernel did not properly validate device metadata. A physically
    proximate attacker could use this to cause a denial of service (system
    crash). (CVE-2020-11668)
    
    It was discovered that the block layer in the Linux kernel contained a race
    condition leading to a use-after-free vulnerability. A local attacker could
    possibly use this to cause a denial of service (system crash) or execute
    arbitrary code. (CVE-2020-12657)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.10:
      linux-image-5.3.0-1017-kvm      5.3.0-1017.19
      linux-image-5.3.0-1018-oracle   5.3.0-1018.20
      linux-image-5.3.0-1019-aws      5.3.0-1019.21
      linux-image-5.3.0-1020-gcp      5.3.0-1020.22
      linux-image-5.3.0-1025-raspi2   5.3.0-1025.27
      linux-image-5.3.0-53-generic    5.3.0-53.47
      linux-image-5.3.0-53-generic-lpae  5.3.0-53.47
      linux-image-5.3.0-53-lowlatency  5.3.0-53.47
      linux-image-5.3.0-53-snapdragon  5.3.0-53.47
      linux-image-aws                 5.3.0.1019.31
      linux-image-gcp                 5.3.0.1020.31
      linux-image-generic             5.3.0.53.45
      linux-image-generic-lpae        5.3.0.53.45
      linux-image-gke                 5.3.0.1020.31
      linux-image-kvm                 5.3.0.1017.19
      linux-image-lowlatency          5.3.0.53.45
      linux-image-oracle              5.3.0.1018.33
      linux-image-raspi2              5.3.0.1025.22
      linux-image-snapdragon          5.3.0.53.45
      linux-image-virtual             5.3.0.53.45
    
    Ubuntu 18.04 LTS:
      linux-image-5.3.0-1018-oracle   5.3.0-1018.20~18.04.1
      linux-image-5.3.0-1019-aws      5.3.0-1019.21~18.04.1
      linux-image-5.3.0-1020-gcp      5.3.0-1020.22~18.04.1
      linux-image-5.3.0-1020-gke      5.3.0-1020.22~18.04.1
      linux-image-5.3.0-53-generic    5.3.0-53.47~18.04.1
      linux-image-5.3.0-53-generic-lpae  5.3.0-53.47~18.04.1
      linux-image-5.3.0-53-lowlatency  5.3.0-53.47~18.04.1
      linux-image-aws                 5.3.0.1019.20
      linux-image-aws-edge            5.3.0.1019.20
      linux-image-gcp                 5.3.0.1020.19
      linux-image-gcp-edge            5.3.0.1020.19
      linux-image-generic-hwe-18.04   5.3.0.53.109
      linux-image-generic-lpae-hwe-18.04  5.3.0.53.109
      linux-image-gke-5.3             5.3.0.1020.10
      linux-image-gkeop-5.3           5.3.0.53.109
      linux-image-lowlatency-hwe-18.04  5.3.0.53.109
      linux-image-oracle              5.3.0.1018.19
      linux-image-snapdragon-hwe-18.04  5.3.0.53.109
      linux-image-virtual-hwe-18.04   5.3.0.53.109
    
    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/4369-1
      CVE-2019-19377, CVE-2019-19769, CVE-2020-11494, CVE-2020-11565,
      CVE-2020-11608, CVE-2020-11609, CVE-2020-11668, CVE-2020-12657
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/5.3.0-53.47
      https://launchpad.net/ubuntu/+source/linux-aws/5.3.0-1019.21
      https://launchpad.net/ubuntu/+source/linux-gcp/5.3.0-1020.22
      https://launchpad.net/ubuntu/+source/linux-kvm/5.3.0-1017.19
      https://launchpad.net/ubuntu/+source/linux-oracle/5.3.0-1018.20
      https://launchpad.net/ubuntu/+source/linux-raspi2/5.3.0-1025.27
      https://launchpad.net/ubuntu/+source/linux-aws-5.3/5.3.0-1019.21~18.04.1
      https://launchpad.net/ubuntu/+source/linux-gcp-5.3/5.3.0-1020.22~18.04.1
      https://launchpad.net/ubuntu/+source/linux-gke-5.3/5.3.0-1020.22~18.04.1
      https://launchpad.net/ubuntu/+source/linux-hwe/5.3.0-53.47~18.04.1
      https://launchpad.net/ubuntu/+source/linux-oracle-5.3/5.3.0-1018.20~18.04.1
    

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