Ubuntu 3386-2: Linux kernel (Trusty HWE) vulnerabilities

    Date10 Aug 2017
    CategoryUbuntu
    50
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3386-2
    August 11, 2017
    
    linux-lts-trusty vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 ESM
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty for Precise ESM
    
    Details:
    
    USN-3386-1 fixed vulnerabilities in the Linux kernel for Ubuntu 14.04
    LTS. This update provides the corresponding updates for the Linux
    Hardware Enablement (HWE) kernel from Ubuntu 14.04 LTS for Ubuntu
    12.04 ESM.
    
    Andrey Konovalov discovered a race condition in the UDP Fragmentation
    Offload (UFO) code in the Linux kernel. A local attacker could use this to
    cause a denial of service or execute arbitrary code. (CVE-2017-1000112)
    
    Andrey Konovalov discovered a race condition in AF_PACKET socket option
    handling code in the Linux kernel. A local unprivileged attacker could use
    this to cause a denial of service or possibly execute arbitrary code.
    (CVE-2017-1000111)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 ESM:
      linux-image-3.13.0-128-generic  3.13.0-128.177~precise1
      linux-image-3.13.0-128-generic-lpae  3.13.0-128.177~precise1
      linux-image-generic-lpae-lts-trusty  3.13.0.128.118
      linux-image-generic-lts-trusty  3.13.0.128.118
    
    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:
      https://www.ubuntu.com/usn/usn-3386-2
      https://www.ubuntu.com/usn/usn-3386-1
      CVE-2017-1000111, CVE-2017-1000112
    
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