Ubuntu 3360-2: Linux kernel (Trusty HWE) vulnerabilities

    Date21 Jul 2017
    CategoryUbuntu
    43
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3360-2
    July 21, 2017
    
    linux-lts-trusty vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise
    
    Details:
    
    USN-3360-1 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 ESM.
    
    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)
    
    It was discovered that a use-after-free vulnerability existed in the
    performance events and counters subsystem of the Linux kernel for ARM64. A
    local attacker could use this to cause a denial of service (system crash)
    or possibly execute arbitrary code. (CVE-2015-8955)
    
    It was discovered that the SCSI generic (sg) driver in the Linux kernel
    contained a double-free vulnerability. A local attacker could use this to
    cause a denial of service (system crash). (CVE-2015-8962)
    
    Sasha Levin discovered that a race condition existed in the performance
    events and counters subsystem of the Linux kernel when handling CPU unplug
    events. A local attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code. (CVE-2015-8963)
    
    Tilman Schmidt and Sasha Levin discovered a use-after-free condition in the
    TTY implementation in the Linux kernel. A local attacker could use this to
    expose sensitive information (kernel memory). (CVE-2015-8964)
    
    It was discovered that the fcntl64() system call in the Linux kernel did
    not properly set memory limits when returning on 32-bit ARM processors. A
    local attacker could use this to gain administrative privileges.
    (CVE-2015-8966)
    
    It was discovered that the system call table for ARM 64-bit processors in
    the Linux kernel was not write-protected. An attacker could use this in
    conjunction with another kernel vulnerability to execute arbitrary code.
    (CVE-2015-8967)
    
    It was discovered that the generic SCSI block layer in the Linux kernel did
    not properly restrict write operations in certain situations. A local
    attacker could use this to cause a denial of service (system crash) or
    possibly gain administrative privileges. (CVE-2016-10088)
    
    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)
    
    Tuomas Haanpää and Ari Kauppi discovered that the NFSv2 and NFSv3 server
    implementations in the Linux kernel did not properly check for the end of
    buffer. A remote attacker could use this to craft requests that cause a
    denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2017-7895)
    
    It was discovered that an integer underflow existed in the Edgeport USB
    Serial Converter device driver of the Linux kernel. An attacker with
    physical access could use this to expose sensitive information (kernel
    memory). (CVE-2017-8924)
    
    It was discovered that the USB ZyXEL omni.net LCD PLUS driver in the Linux
    kernel did not properly perform reference counting. A local attacker could
    use this to cause a denial of service (tty exhaustion). (CVE-2017-8925)
    
    Andrey Konovalov discovered an IPv6 out-of-bounds read error in the Linux
    kernel's IPv6 stack. A local attacker could cause a denial of service or
    potentially other unspecified problems. (CVE-2017-9074)
    
    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 12.04 ESM:
      linux-image-3.13.0-125-generic  3.13.0-125.174~precise1
      linux-image-3.13.0-125-generic-lpae  3.13.0-125.174~precise1
      linux-image-generic-lpae-lts-trusty  3.13.0.125.116
      linux-image-generic-lts-trusty  3.13.0.125.116
    
    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-3360-2
      https://www.ubuntu.com/usn/usn-3360-1
      CVE-2014-9900, CVE-2015-8944, CVE-2015-8955, CVE-2015-8962,
      CVE-2015-8963, CVE-2015-8964, CVE-2015-8966, CVE-2015-8967,
      CVE-2016-10088, CVE-2017-1000380, CVE-2017-7346, CVE-2017-7895,
      CVE-2017-8924, CVE-2017-8925, CVE-2017-9074, CVE-2017-9605
    
    
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