Ubuntu 3127-2: Linux kernel (Trusty HWE) vulnerabilities

    Date11 Nov 2016
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    Ubuntu Security Notice USN-3127-2
    November 11, 2016
    linux-lts-trusty vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 12.04 LTS
    Several security issues were fixed in the kernel.
    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise
    USN-3127-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
    LTS. This update provides the corresponding updates for the Linux
    Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
    12.04 LTS.
    It was discovered that the compression handling code in the Advanced Linux
    Sound Architecture (ALSA) subsystem in the Linux kernel did not properly
    check for an integer overflow. A local attacker could use this to cause a
    denial of service (system crash). (CVE-2014-9904)
    Kirill A. Shutemov discovered that memory manager in the Linux kernel did
    not properly handle anonymous pages. A local attacker could use this to
    cause a denial of service or possibly gain administrative privileges.
    Vitaly Kuznetsov discovered that the Linux kernel did not properly suppress
    hugetlbfs support in X86 paravirtualized guests. An attacker in the guest
    OS could cause a denial of service (guest system crash). (CVE-2016-3961)
    Ondrej Kozina discovered that the keyring interface in the Linux kernel
    contained a buffer overflow when displaying timeout events via the
    /proc/keys interface. A local attacker could use this to cause a denial of
    service (system crash). (CVE-2016-7042)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 12.04 LTS:
      linux-image-3.13.0-101-generic  3.13.0-101.148~precise1
      linux-image-3.13.0-101-generic-lpae  3.13.0-101.148~precise1
    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-2014-9904, CVE-2015-3288, CVE-2016-3961, CVE-2016-7042
    Package Information:
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