Ubuntu 2792-1: Linux kernel vulnerabilities

    Date05 Nov 2015
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    Ubuntu Security Notice USN-2792-1
    November 05, 2015
    linux 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: Linux kernel
    Dmitry Vyukov discovered that the Linux kernel did not properly initialize
    IPC object state in certain situations. A local attacker could use this to
    escalate their privileges, expose confidential information, or cause a
    denial of service (system crash). (CVE-2015-7613)
    It was discovered that the Linux kernel did not check if a new IPv6 MTU set
    by a user space application was valid. A remote attacker could forge a
    route advertisement with an invalid MTU that a user space daemon like
    NetworkManager would honor and apply to the kernel, causing a denial of
    service. (CVE-2015-0272)
    It was discovered that in certain situations, a directory could be renamed
    outside of a bind mounted location. An attacker could use this to escape
    bind mount containment and gain access to sensitive information.
    Moein Ghasemzadeh discovered that the USB WhiteHEAT serial driver contained
    hardcoded attributes about the USB devices. An attacker could construct a
    fake WhiteHEAT USB device that, when inserted, causes a denial of service
    (system crash). (CVE-2015-5257)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 12.04 LTS:
      linux-image-3.2.0-93-generic    3.2.0-93.133
      linux-image-3.2.0-93-generic-pae  3.2.0-93.133
      linux-image-3.2.0-93-highbank   3.2.0-93.133
      linux-image-3.2.0-93-omap       3.2.0-93.133
      linux-image-3.2.0-93-powerpc-smp  3.2.0-93.133
      linux-image-3.2.0-93-powerpc64-smp  3.2.0-93.133
      linux-image-3.2.0-93-virtual    3.2.0-93.133
    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-2015-0272, CVE-2015-2925, CVE-2015-5257, CVE-2015-7613
    Package Information:

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