Ubuntu 2682-1: Linux kernel (Utopic HWE) vulnerabilities

    Date23 Jul 2015
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    Ubuntu Security Notice USN-2682-1
    July 23, 2015
    linux-lts-utopic vulnerabilities
    A security issue affects these releases of Ubuntu and its derivatives:
    - Ubuntu 14.04 LTS
    Several security issues were fixed in the kernel.
    Software Description:
    - linux-lts-utopic: Linux hardware enablement kernel from Utopic
    A flaw was discovered in the kvm (kernel virtual machine) subsystem's
    kvm_apic_has_events function. A unprivileged local user could exploit this
    flaw to cause a denial of service (system crash). (CVE-2015-4692)
    A flaw was discovered in how the Linux kernel handles invalid UDP
    checksums. A remote attacker could exploit this flaw to cause a denial of
    service using a flood of UDP packets with invalid checksums.
    A flaw was discovered in how the Linux kernel handles invalid UDP
    checksums. A remote attacker can cause a denial of service against
    applications that use epoll by injecting a single packet with an invalid
    checksum. (CVE-2015-5366)
    Update instructions:
    The problem can be corrected by updating your system to the following
    package versions:
    Ubuntu 14.04 LTS:
      linux-image-3.16.0-44-generic   3.16.0-44.59~14.04.1
      linux-image-3.16.0-44-generic-lpae  3.16.0-44.59~14.04.1
      linux-image-3.16.0-44-lowlatency  3.16.0-44.59~14.04.1
      linux-image-3.16.0-44-powerpc-e500mc  3.16.0-44.59~14.04.1
      linux-image-3.16.0-44-powerpc-smp  3.16.0-44.59~14.04.1
      linux-image-3.16.0-44-powerpc64-emb  3.16.0-44.59~14.04.1
      linux-image-3.16.0-44-powerpc64-smp  3.16.0-44.59~14.04.1
    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-2015-4692, CVE-2015-5364, CVE-2015-5366
    Package Information:
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