Ubuntu 3697-1: Linux kernel vulnerabilities

    Date02 Jul 2018
    CategoryUbuntu
    3680
    Posted ByAnthony Pell
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3697-1
    July 02, 2018
    
    linux, linux-raspi2 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 17.10
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux: Linux kernel
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    
    Details:
    
    It was discovered that a null pointer dereference vulnerability existed in
    the DCCP protocol implementation in the Linux kernel. A local attacker
    could use this to cause a denial of service (system crash). (CVE-2018-1130)
    
    Jann Horn discovered that the 32 bit adjtimex() syscall implementation for
    64 bit Linux kernels did not properly initialize memory returned to user
    space in some situations. A local attacker could use this to expose
    sensitive information (kernel memory). (CVE-2018-11508)
    
    Wang Qize discovered that an information disclosure vulnerability existed
    in the SMBus driver for ACPI Embedded Controllers in the Linux kernel. A
    local attacker could use this to expose sensitive information (kernel
    pointer addresses). (CVE-2018-5750)
    
    It was discovered that the SCTP Protocol implementation in the Linux kernel
    did not properly validate userspace provided payload lengths in some
    situations. A local attacker could use this to cause a denial of service
    (system crash). (CVE-2018-5803)
    
    It was discovered that an integer overflow error existed in the futex
    implementation in the Linux kernel. A local attacker could use this to
    cause a denial of service (system crash). (CVE-2018-6927)
    
    It was discovered that an information leak vulnerability existed in the
    floppy driver in the Linux kernel. A local attacker could use this to
    expose sensitive information (kernel memory). (CVE-2018-7755)
    
    It was discovered that a memory leak existed in the SAS driver subsystem of
    the Linux kernel. A local attacker could use this to cause a denial of
    service (memory exhaustion). (CVE-2018-7757)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 17.10:
      linux-image-4.13.0-1023-raspi2  4.13.0-1023.24
      linux-image-4.13.0-46-generic   4.13.0-46.51
      linux-image-4.13.0-46-generic-lpae  4.13.0-46.51
      linux-image-4.13.0-46-lowlatency  4.13.0-46.51
      linux-image-generic             4.13.0.46.49
      linux-image-generic-lpae        4.13.0.46.49
      linux-image-lowlatency          4.13.0.46.49
      linux-image-raspi2              4.13.0.1023.21
    
    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://usn.ubuntu.com/usn/usn-3697-1
      CVE-2018-1130, CVE-2018-11508, CVE-2018-5750, CVE-2018-5803,
      CVE-2018-6927, CVE-2018-7755, CVE-2018-7757
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.13.0-46.51
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.13.0-1023.24
    
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