Ubuntu 4093-1: Linux kernel vulnerabilities

    Date13 Aug 2019
    CategoryUbuntu
    1128
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4093-1
    August 13, 2019
    
    linux, linux-hwe, linux-azure, linux-gcp, linux-kvm, linux-raspi2,
    linux-snapdragon 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-azure: Linux kernel for Microsoft Azure Cloud systems
    - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-kvm: Linux kernel for cloud environments
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    - linux-snapdragon: Linux kernel for Snapdragon processors
    - linux-hwe: Linux hardware enablement (HWE) kernel
    
    Details:
    
    It was discovered that a heap buffer overflow existed in the Marvell
    Wireless LAN device driver for the Linux kernel. An attacker could use this
    to cause a denial of service (system crash) or possibly execute arbitrary
    code. (CVE-2019-10126)
    
    Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors
    incorrectly handle SWAPGS instructions during speculative execution. A
    local attacker could use this to expose sensitive information (kernel
    memory). (CVE-2019-1125)
    
    It was discovered that the PowerPC dlpar implementation in the Linux kernel
    did not properly check for allocation errors in some situations. A local
    attacker could possibly use this to cause a denial of service (system
    crash). (CVE-2019-12614)
    
    It was discovered that a NULL pointer dereference vulnerability existed in
    the Near-field communication (NFC) implementation in the Linux kernel. A
    local attacker could use this to cause a denial of service (system crash).
    (CVE-2019-12984)
    
    Jann Horn discovered a use-after-free vulnerability in the Linux kernel
    when accessing LDT entries in some situations. A local attacker could use
    this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2019-13233)
    
    Jann Horn discovered that the ptrace implementation in the Linux kernel did
    not properly record credentials in some situations. A local attacker could
    use this to cause a denial of service (system crash) or possibly gain
    administrative privileges. (CVE-2019-13272)
    
    It was discovered that the Marvell Wireless LAN device driver in the Linux
    kernel did not properly validate the BSS descriptor. A local attacker could
    possibly use this to cause a denial of service (system crash) or possibly
    execute arbitrary code. (CVE-2019-3846)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 19.04:
      linux-image-5.0.0-1013-gcp      5.0.0-1013.13
      linux-image-5.0.0-1013-kvm      5.0.0-1013.14
      linux-image-5.0.0-1014-azure    5.0.0-1014.14
      linux-image-5.0.0-1014-raspi2   5.0.0-1014.14
      linux-image-5.0.0-1018-snapdragon  5.0.0-1018.19
      linux-image-5.0.0-25-generic    5.0.0-25.26
      linux-image-5.0.0-25-generic-lpae  5.0.0-25.26
      linux-image-5.0.0-25-lowlatency  5.0.0-25.26
      linux-image-azure               5.0.0.1014.13
      linux-image-gcp                 5.0.0.1013.13
      linux-image-generic             5.0.0.25.26
      linux-image-generic-lpae        5.0.0.25.26
      linux-image-gke                 5.0.0.1013.13
      linux-image-kvm                 5.0.0.1013.13
      linux-image-lowlatency          5.0.0.25.26
      linux-image-raspi2              5.0.0.1014.11
      linux-image-snapdragon          5.0.0.1018.11
      linux-image-virtual             5.0.0.25.26
    
    Ubuntu 18.04 LTS:
      linux-image-5.0.0-1014-azure    5.0.0-1014.14~18.04.1
      linux-image-5.0.0-25-generic    5.0.0-25.26~18.04.1
      linux-image-5.0.0-25-generic-lpae  5.0.0-25.26~18.04.1
      linux-image-5.0.0-25-lowlatency  5.0.0-25.26~18.04.1
      linux-image-azure               5.0.0.1014.25
      linux-image-generic-hwe-18.04   5.0.0.25.82
      linux-image-generic-lpae-hwe-18.04  5.0.0.25.82
      linux-image-lowlatency-hwe-18.04  5.0.0.25.82
      linux-image-snapdragon-hwe-18.04  5.0.0.25.82
      linux-image-virtual-hwe-18.04   5.0.0.25.82
    
    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/4093-1
      CVE-2019-10126, CVE-2019-1125, CVE-2019-12614, CVE-2019-12984,
      CVE-2019-13233, CVE-2019-13272, CVE-2019-3846
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/5.0.0-25.26
      https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1014.14
      https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1013.13
      https://launchpad.net/ubuntu/+source/linux-kvm/5.0.0-1013.14
      https://launchpad.net/ubuntu/+source/linux-raspi2/5.0.0-1014.14
      https://launchpad.net/ubuntu/+source/linux-snapdragon/5.0.0-1018.19
      https://launchpad.net/ubuntu/+source/linux-azure/5.0.0-1014.14~18.04.1
      https://launchpad.net/ubuntu/+source/linux-hwe/5.0.0-25.26~18.04.1
    
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