Ubuntu 2844-1: Linux kernel (Utopic HWE) vulnerabilities

    Date 17 Dec 2015
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    Ubuntu Security Notice USN-2844-1
    December 17, 2015
    linux-lts-utopic vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 14.04 LTS
    Several security issues were fixed in the kernel.
    Software Description:
    - linux-lts-utopic: Linux hardware enablement kernel from Utopic
    Jan Beulich discovered that the KVM svm hypervisor implementation in the
    Linux kernel did not properly catch Debug exceptions on AMD processors. An
    attacker in a guest virtual machine could use this to cause a denial of
    service (system crash) in the host OS. (CVE-2015-8104)
    郭永刚 discovered that the ppp implementation in the Linux kernel did
    not ensure that certain slot numbers are valid. A local attacker with the
    privilege to call ioctl() on /dev/ppp could cause a denial of service
    (system crash). (CVE-2015-7799)
    It was discovered that the driver for Digi Neo and ClassicBoard devices did
    not properly initialize data structures. A local attacker could use this to
    obtain sensitive information from the kernel. (CVE-2015-7885)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 14.04 LTS:
      linux-image-3.16.0-56-generic   3.16.0-56.75~14.04.1
      linux-image-3.16.0-56-generic-lpae  3.16.0-56.75~14.04.1
      linux-image-3.16.0-56-lowlatency  3.16.0-56.75~14.04.1
      linux-image-3.16.0-56-powerpc-e500mc  3.16.0-56.75~14.04.1
      linux-image-3.16.0-56-powerpc-smp  3.16.0-56.75~14.04.1
      linux-image-3.16.0-56-powerpc64-emb  3.16.0-56.75~14.04.1
      linux-image-3.16.0-56-powerpc64-smp  3.16.0-56.75~14.04.1
    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. If
    you use linux-restricted-modules, you have to update that package as
    well to get modules which work with the new kernel version. Unless you
    manually uninstalled the standard kernel metapackages (e.g. linux-generic,
    linux-server, linux-powerpc), a standard system upgrade will automatically
    perform this as well.
      CVE-2015-7799, CVE-2015-7885, CVE-2015-8104
    Package Information:

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