Ubuntu 4069-1: Linux kernel vulnerabilities

    Date 22 Jul 2019
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    Ubuntu Security Notice USN-4069-1
    July 23, 2019
    linux, linux-aws, 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
    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-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
    It was discovered that an integer overflow existed in the Linux kernel when
    reference counting pages, leading to potential use-after-free issues. A
    local attacker could use this to cause a denial of service (system crash)
    or possibly execute arbitrary code. (CVE-2019-11487)
    Jann Horn discovered that a race condition existed in the Linux kernel when
    performing core dumps. A local attacker could use this to cause a denial of
    service (system crash) or expose sensitive information. (CVE-2019-11599)
    It was discovered that the ext4 file system implementation in the Linux
    kernel did not properly zero out memory in some situations. A local
    attacker could use this to expose sensitive information (kernel memory).
    It was discovered that the Bluetooth Human Interface Device Protocol (HIDP)
    implementation in the Linux kernel did not properly verify strings were
    NULL terminated in certain situations. A local attacker could use this to
    expose sensitive information (kernel memory). (CVE-2019-11884)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 19.04:
      linux-image-5.0.0-1011-aws      5.0.0-1011.12
      linux-image-5.0.0-1011-gcp      5.0.0-1011.11
      linux-image-5.0.0-1011-kvm      5.0.0-1011.12
      linux-image-5.0.0-1012-azure    5.0.0-1012.12
      linux-image-5.0.0-1013-raspi2   5.0.0-1013.13
      linux-image-5.0.0-1017-snapdragon  5.0.0-1017.18
      linux-image-5.0.0-21-generic    5.0.0-21.22
      linux-image-5.0.0-21-generic-lpae  5.0.0-21.22
      linux-image-5.0.0-21-lowlatency  5.0.0-21.22
    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.
      CVE-2019-11487, CVE-2019-11599, CVE-2019-11833, CVE-2019-11884
    Package Information:

    LinuxSecurity Poll

    How do you feel about the elimination of the terms 'blacklist' and 'slave' from the Linux kernel?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    [{"id":"112","title":"I strongly support this change - racially charged language should not be used in the code and documentation of the kernel and other open-source projects.","votes":"3","type":"x","order":"1","pct":42.86,"resources":[]},{"id":"113","title":"I'm indifferent - this small change will not affect broader issues of racial insensitivity and white privilege.","votes":"2","type":"x","order":"2","pct":28.57,"resources":[]},{"id":"114","title":"I'm opposed to this change - there is no need to change language that has been used for years. It doesn't make sense for people to take offense to terminology used in community projects.","votes":"2","type":"x","order":"3","pct":28.57,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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