Ubuntu 3190-2: Linux kernel (Raspberry Pi 2) vulnerabilities

    Date09 Feb 2017
    CategoryUbuntu
    70
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3190-2
    February 10, 2017
    
    linux-raspi2 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.10
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    
    Details:
    
    Mikulas Patocka discovered that the asynchronous multibuffer cryptographic
    daemon (mcryptd) in the Linux kernel did not properly handle being invoked
    with incompatible algorithms. A local attacker could use this to cause a
    denial of service (system crash). (CVE-2016-10147)
    
    It was discovered that a use-after-free existed in the KVM susbsystem of
    the Linux kernel when creating devices. A local attacker could use this to
    cause a denial of service (system crash). (CVE-2016-10150)
    
    Qidan He discovered that the ICMP implementation in the Linux kernel did
    not properly check the size of an ICMP header. A local attacker with
    CAP_NET_ADMIN could use this to expose sensitive information.
    (CVE-2016-8399)
    
    Qian Zhang discovered a heap-based buffer overflow in the tipc_msg_build()
    function in the Linux kernel. A local attacker could use to cause a denial
    of service (system crash) or possible execute arbitrary code with
    administrative privileges. (CVE-2016-8632)
    
    Dmitry Vyukov discovered that the KVM implementation in the Linux kernel
    did not properly restrict the VCPU index when I/O APIC is enabled, An
    attacker in a guest VM could use this to cause a denial of service (system
    crash) or possibly gain privileges in the host OS. (CVE-2016-9777)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.10:
      linux-image-4.8.0-1024-raspi2   4.8.0-1024.27
      linux-image-raspi2              4.8.0.1024.27
    
    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-3190-2
      http://www.ubuntu.com/usn/usn-3190-1
      CVE-2016-10147, CVE-2016-10150, CVE-2016-8399, CVE-2016-8632,
      CVE-2016-9777
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.8.0-1024.27
    
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