Ubuntu 3910-2: Linux kernel (Xenial HWE) vulnerabilities

    Date15 Mar 2019
    CategoryUbuntu
    1348
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3910-2
    March 15, 2019
    
    linux-lts-xenial, linux-aws vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
    - linux-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
    
    Details:
    
    USN-3910-1 fixed vulnerabilities in the Linux kernel for Ubuntu 16.04
    LTS. This update provides the corresponding updates for the Linux
    Hardware Enablement (HWE) kernel from Ubuntu 16.04 LTS for Ubuntu
    14.04 LTS.
    
    It was discovered that the f2fs filesystem implementation in the Linux
    kernel did not handle the noflush_merge mount option correctly. An attacker
    could use this to cause a denial of service (system crash).
    (CVE-2017-18241)
    
    It was discovered that the procfs filesystem did not properly handle
    processes mapping some memory elements onto files. A local attacker could
    use this to block utilities that examine the procfs filesystem to report
    operating system state, such as ps(1). (CVE-2018-1120)
    
    Hui Peng and Mathias Payer discovered that the Option USB High Speed driver
    in the Linux kernel did not properly validate metadata received from the
    device. A physically proximate attacker could use this to cause a denial of
    service (system crash). (CVE-2018-19985)
    
    It was discovered that multiple integer overflows existed in the hugetlbfs
    implementation in the Linux kernel. A local attacker could use this to
    cause a denial of service (system crash). (CVE-2018-7740)
    
    Jann Horn discovered a race condition in the fork() system call in the
    Linux kernel. A local attacker could use this to gain access to services
    that cache authorizations. (CVE-2019-6133)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-4.4.0-1039-aws      4.4.0-1039.42
      linux-image-4.4.0-143-generic   4.4.0-143.169~14.04.2
      linux-image-4.4.0-143-generic-lpae  4.4.0-143.169~14.04.2
      linux-image-4.4.0-143-lowlatency  4.4.0-143.169~14.04.2
      linux-image-4.4.0-143-powerpc-e500mc  4.4.0-143.169~14.04.2
      linux-image-4.4.0-143-powerpc-smp  4.4.0-143.169~14.04.2
      linux-image-4.4.0-143-powerpc64-emb  4.4.0-143.169~14.04.2
      linux-image-4.4.0-143-powerpc64-smp  4.4.0-143.169~14.04.2
      linux-image-aws                 4.4.0.1039.40
      linux-image-generic-lpae-lts-xenial  4.4.0.143.125
      linux-image-generic-lts-xenial  4.4.0.143.125
      linux-image-lowlatency-lts-xenial  4.4.0.143.125
      linux-image-powerpc-e500mc-lts-xenial  4.4.0.143.125
      linux-image-powerpc-smp-lts-xenial  4.4.0.143.125
      linux-image-powerpc64-emb-lts-xenial  4.4.0.143.125
      linux-image-powerpc64-smp-lts-xenial  4.4.0.143.125
      linux-image-virtual-lts-xenial  4.4.0.143.125
    
    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/usn/usn-3910-2
      https://usn.ubuntu.com/usn/usn-3910-1
      CVE-2017-18241, CVE-2018-1120, CVE-2018-19985, CVE-2018-7740,
      CVE-2019-6133
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1039.42
      https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-143.169~14.04.2
    
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