Ubuntu 3364-2: Linux kernel (Xenial HWE) vulnerabilities

    Date24 Jul 2017
    CategoryUbuntu
    41
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3364-2
    July 24, 2017
    
    linux-lts-xenial 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-lts-xenial: Linux hardware enablement kernel from Xenial for Trusty
    
    Details:
    
    USN-3364-1 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 Linux kernel did not properly initialize a Wake-
    on-Lan data structure. A local attacker could use this to expose sensitive
    information (kernel memory). (CVE-2014-9900)
    
    It was discovered that the Linux kernel did not properly restrict access to
    /proc/iomem. A local attacker could use this to expose sensitive
    information. (CVE-2015-8944)
    
    Alexander Potapenko discovered a race condition in the Advanced Linux Sound
    Architecture (ALSA) subsystem in the Linux kernel. A local attacker could
    use this to expose sensitive information (kernel memory).
    (CVE-2017-1000380)
    
    Li Qiang discovered that the DRM driver for VMware Virtual GPUs in the
    Linux kernel did not properly validate some ioctl arguments. A local
    attacker could use this to cause a denial of service (system crash).
    (CVE-2017-7346)
    
    Jann Horn discovered that bpf in Linux kernel does not restrict the output
    of the print_bpf_insn function. A local attacker could use this to obtain
    sensitive address information. (CVE-2017-9150)
    
    Murray McAllister discovered that the DRM driver for VMware Virtual GPUs in
    the Linux kernel did not properly initialize memory. A local attacker could
    use this to expose sensitive information (kernel memory). (CVE-2017-9605)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-4.4.0-87-generic    4.4.0-87.110~14.04.1
      linux-image-4.4.0-87-generic-lpae  4.4.0-87.110~14.04.1
      linux-image-4.4.0-87-lowlatency  4.4.0-87.110~14.04.1
      linux-image-4.4.0-87-powerpc-e500mc  4.4.0-87.110~14.04.1
      linux-image-4.4.0-87-powerpc-smp  4.4.0-87.110~14.04.1
      linux-image-4.4.0-87-powerpc64-emb  4.4.0-87.110~14.04.1
      linux-image-4.4.0-87-powerpc64-smp  4.4.0-87.110~14.04.1
      linux-image-generic-lpae-lts-xenial  4.4.0.87.72
      linux-image-generic-lts-xenial  4.4.0.87.72
      linux-image-lowlatency-lts-xenial  4.4.0.87.72
      linux-image-powerpc-e500mc-lts-xenial  4.4.0.87.72
      linux-image-powerpc-smp-lts-xenial  4.4.0.87.72
      linux-image-powerpc64-emb-lts-xenial  4.4.0.87.72
      linux-image-powerpc64-smp-lts-xenial  4.4.0.87.72
    
    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://www.ubuntu.com/usn/usn-3364-2
      https://www.ubuntu.com/usn/usn-3364-1
      CVE-2014-9900, CVE-2015-8944, CVE-2017-1000380, CVE-2017-7346,
      CVE-2017-9150, CVE-2017-9605
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-87.110~14.04.1
    
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