Ubuntu 3017-3: Linux kernel (Wily HWE) vulnerabilities

    Date27 Jun 2016
    CategoryUbuntu
    83
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3017-3
    June 27, 2016
    
    linux-lts-wily 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-lts-wily: Linux hardware enablement kernel from Wily for Trusty
    
    Details:
    
    USN-3017-1 fixed vulnerabilities in the Linux kernel for Ubuntu 15.10.
    This update provides the corresponding updates for the Linux Hardware
    Enablement (HWE) kernel from Ubuntu 15.10 for Ubuntu 14.04 LTS.
    
    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)
    
    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)
    
    Baozeng Ding discovered that the Transparent Inter-process Communication
    (TIPC) implementation in the Linux kernel did not verify socket existence
    before use in some situations. A local attacker could use this to cause a
    denial of service (system crash). (CVE-2016-4951)
    
    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-4.2.0-41-generic    4.2.0-41.48~14.04.1
      linux-image-4.2.0-41-generic-lpae  4.2.0-41.48~14.04.1
      linux-image-4.2.0-41-lowlatency  4.2.0-41.48~14.04.1
      linux-image-4.2.0-41-powerpc-e500mc  4.2.0-41.48~14.04.1
      linux-image-4.2.0-41-powerpc-smp  4.2.0-41.48~14.04.1
      linux-image-4.2.0-41-powerpc64-emb  4.2.0-41.48~14.04.1
      linux-image-4.2.0-41-powerpc64-smp  4.2.0-41.48~14.04.1
    
    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.
    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-3017-3
      http://www.ubuntu.com/usn/usn-3017-1
      CVE-2016-4482, CVE-2016-4569, CVE-2016-4578, CVE-2016-4580,
      CVE-2016-4913, CVE-2016-4951, CVE-2016-4997, CVE-2016-4998
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-wily/4.2.0-41.48~14.04.1
    
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