Ubuntu 3018-1: Linux kernel vulnerabilities

    Date27 Jun 2016
    CategoryUbuntu
    39
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3018-1
    June 27, 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:
    
    Jesse Hertz and Tim Newsham discovered that the Linux netfilter
    implementation did not correctly perform validation when handling 32 bit
    compatibility IPT_SO_SET_REPLACE events on 64 bit platforms. A local
    unprivileged attacker could use this to cause a denial of service (system
    crash) or execute arbitrary code with administrative privileges.
    (CVE-2016-4997)
    
    Kangjie Lu discovered an information leak in the core USB implementation in
    the Linux kernel. A local attacker could use this to obtain potentially
    sensitive information from kernel memory. (CVE-2016-4482)
    
    Jann Horn discovered that the InfiniBand interfaces within the Linux kernel
    could be coerced into overwriting kernel memory. A local unprivileged
    attacker could use this to possibly gain administrative privileges on
    systems where InifiniBand related kernel modules are loaded.
    (CVE-2016-4565)
    
    Kangjie Lu discovered an information leak in the timer handling
    implementation in the Advanced Linux Sound Architecture (ALSA) subsystem of
    the Linux kernel. A local attacker could use this to obtain potentially
    sensitive information from kernel memory. (CVE-2016-4569, CVE-2016-4578)
    
    Kangjie Lu discovered an information leak in the X.25 Call Request handling
    in the Linux kernel. A local attacker could use this to obtain potentially
    sensitive information from kernel memory. (CVE-2016-4580)
    
    It was discovered that an information leak exists in the Rock Ridge
    implementation in the Linux kernel. A local attacker who is able to mount a
    malicious iso9660 file system image could exploit this flaw to obtain
    potentially sensitive information from kernel memory. (CVE-2016-4913)
    
    Jesse Hertz and Tim Newsham discovered that the Linux netfilter
    implementation did not correctly perform validation when handling
    IPT_SO_SET_REPLACE events. A local unprivileged attacker could use this to
    cause a denial of service (system crash) or obtain potentially sensitive
    information from kernel memory. (CVE-2016-4998)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-3.13.0-91-generic   3.13.0-91.138
      linux-image-3.13.0-91-generic-lpae  3.13.0-91.138
      linux-image-3.13.0-91-lowlatency  3.13.0-91.138
      linux-image-3.13.0-91-powerpc-e500  3.13.0-91.138
      linux-image-3.13.0-91-powerpc-e500mc  3.13.0-91.138
      linux-image-3.13.0-91-powerpc-smp  3.13.0-91.138
      linux-image-3.13.0-91-powerpc64-emb  3.13.0-91.138
      linux-image-3.13.0-91-powerpc64-smp  3.13.0-91.138
    
    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-3018-1
      CVE-2016-4482, CVE-2016-4565, CVE-2016-4569, CVE-2016-4578,
      CVE-2016-4580, CVE-2016-4913, CVE-2016-4997, CVE-2016-4998
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.13.0-91.138
    
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