Ubuntu 3099-3: Linux kernel (Raspberry Pi 2) vulnerabilities

    Date11 Oct 2016
    CategoryUbuntu
    44
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3099-3
    October 11, 2016
    
    linux-raspi2 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    
    Details:
    
    Vladimír Beneš discovered an unbounded recursion in the VLAN and TEB
    Generic Receive Offload (GRO) processing implementations in the Linux
    kernel, A remote attacker could use this to cause a stack corruption,
    leading to a denial of service (system crash). (CVE-2016-7039)
    
    Marco Grassi discovered a use-after-free condition could occur in the TCP
    retransmit queue handling code in the Linux kernel. A local attacker could
    use this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2016-6828)
    
    Pengfei Wang discovered a race condition in the Adaptec AAC RAID controller
    driver in the Linux kernel when handling ioctl()s. A local attacker could
    use this to cause a denial of service (system crash). (CVE-2016-6480)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.04 LTS:
      linux-image-4.4.0-1027-raspi2   4.4.0-1027.33
    
    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-3099-3
      http://www.ubuntu.com/usn/usn-3099-1
      CVE-2016-6480, CVE-2016-6828, CVE-2016-7039
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1027.33
    
    
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