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Ubuntu Security Update USN-3291-1: Linux kernel vulnerabilities

Discussion in 'Linux Security Announcements (Automated)' started by LinuxBot, May 17, 2017.

  1. LinuxBot

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    Ubuntu Security Notice USN-3291-1


    16th May, 2017

    linux vulnerabilities


    A security issue affects these releases of Ubuntu and its derivatives:

    • Ubuntu 16.04 LTS
    Summary


    Several security issues were fixed in the kernel.

    Software description

    • linux - Linux kernel
    Details


    Dmitry Vyukov discovered that the generic SCSI (sg) subsystem in the Linux
    kernel contained a stack-based buffer overflow. A local attacker with
    access to an sg device could use this to cause a denial of service (system
    crash) or possibly execute arbitrary code. (CVE-2017-7187)

    It was discovered that a NULL pointer dereference existed in the Direct
    Rendering Manager (DRM) driver for VMWare devices in the Linux kernel. A
    local attacker could use this to cause a denial of service (system crash).
    (CVE-2017-7261)

    Li Qiang discovered that an integer overflow vulnerability existed in the
    Direct Rendering Manager (DRM) driver for VMWare devices in the Linux
    kernel. A local attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code. (CVE-2017-7294)

    It was discovered that an information leak existed in the set_mempolicy and
    mbind compat syscalls in the Linux kernel. A local attacker could use this
    to expose sensitive information (kernel memory). (CVE-2017-7616)

    Update instructions


    The problem can be corrected by updating your system to the following package version:

    Ubuntu 16.04 LTS:
    linux-image-powerpc-smp 4.4.0.78.84
    linux-image-powerpc-e500mc 4.4.0.78.84
    linux-image-4.4.0-78-powerpc64-emb 4.4.0-78.99
    linux-image-generic 4.4.0.78.84
    linux-image-4.4.0-78-powerpc-smp 4.4.0-78.99
    linux-image-4.4.0-78-generic 4.4.0-78.99
    linux-image-4.4.0-78-lowlatency 4.4.0-78.99
    linux-image-powerpc64-emb 4.4.0.78.84
    linux-image-4.4.0-78-generic-lpae 4.4.0-78.99
    linux-image-powerpc64-smp 4.4.0.78.84
    linux-image-generic-lpae 4.4.0.78.84
    linux-image-4.4.0-78-powerpc-e500mc 4.4.0-78.99
    linux-image-lowlatency 4.4.0.78.84
    linux-image-4.4.0-78-powerpc64-smp 4.4.0-78.99

    To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

    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


    CVE-2017-7187, CVE-2017-7261, CVE-2017-7294, CVE-2017-7616

    Continue reading...


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