Ubuntu 3021-1: Linux kernel vulnerabilities

    Date27 Jun 2016
    CategoryUbuntu
    60
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3021-1
    June 27, 2016
    
    linux vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux: Linux kernel
    
    Details:
    
    Andrey Konovalov discovered that the CDC Network Control Model USB driver
    in the Linux kernel did not cancel work events queued if a later error
    occurred, resulting in a use-after-free. An attacker with physical access
    could use this to cause a denial of service (system crash). (CVE-2016-3951)
    
    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)
    
    Baozeng Ding discovered a use-after-free issue in the generic PPP layer in
    the Linux kernel. A local attacker could use this to cause a denial of
    service (system crash). (CVE-2016-4805)
    
    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)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      linux-image-3.2.0-105-generic   3.2.0-105.146
      linux-image-3.2.0-105-generic-pae  3.2.0-105.146
      linux-image-3.2.0-105-highbank  3.2.0-105.146
      linux-image-3.2.0-105-omap      3.2.0-105.146
      linux-image-3.2.0-105-powerpc-smp  3.2.0-105.146
      linux-image-3.2.0-105-powerpc64-smp  3.2.0-105.146
      linux-image-3.2.0-105-virtual   3.2.0-105.146
    
    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-3021-1
      CVE-2016-3951, CVE-2016-4482, CVE-2016-4565, CVE-2016-4569,
      CVE-2016-4578, CVE-2016-4580, CVE-2016-4805, CVE-2016-4913
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/3.2.0-105.146
    
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