Ubuntu 3127-1: Linux kernel vulnerabilities

    Date11 Nov 2016
    CategoryUbuntu
    78
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3127-1
    November 11, 2016
    
    linux vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    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.
    (CVE-2015-3288)
    
    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 14.04 LTS:
      linux-image-3.13.0-101-generic  3.13.0-101.148
      linux-image-3.13.0-101-generic-lpae  3.13.0-101.148
      linux-image-3.13.0-101-lowlatency  3.13.0-101.148
      linux-image-3.13.0-101-powerpc-e500  3.13.0-101.148
      linux-image-3.13.0-101-powerpc-e500mc  3.13.0-101.148
      linux-image-3.13.0-101-powerpc-smp  3.13.0-101.148
      linux-image-3.13.0-101-powerpc64-emb  3.13.0-101.148
      linux-image-3.13.0-101-powerpc64-smp  3.13.0-101.148
      linux-image-generic             3.13.0.101.109
      linux-image-generic-lpae        3.13.0.101.109
      linux-image-lowlatency          3.13.0.101.109
      linux-image-powerpc-e500        3.13.0.101.109
      linux-image-powerpc-e500mc      3.13.0.101.109
      linux-image-powerpc-smp         3.13.0.101.109
      linux-image-powerpc64-emb       3.13.0.101.109
      linux-image-powerpc64-smp       3.13.0.101.109
      linux-image-virtual             3.13.0.101.109
    
    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:
      http://www.ubuntu.com/usn/usn-3127-1
      CVE-2014-9904, CVE-2015-3288, CVE-2016-3961, CVE-2016-7042
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.13.0-101.148
    
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