Ubuntu 3099-1: Linux kernel vulnerabilities

    Date 11 Oct 2016
    106
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-3099-1
    October 11, 2016
    
    linux 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: Linux kernel
    
    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 s390 SCLP console driver
    for the Linux kernel when handling ioctl()s. A local attacker could use
    this to obtain sensitive information from kernel memory. (CVE-2016-6130)
    
    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-4.4.0-42-generic    4.4.0-42.62
      linux-image-4.4.0-42-generic-lpae  4.4.0-42.62
      linux-image-4.4.0-42-lowlatency  4.4.0-42.62
      linux-image-4.4.0-42-powerpc-e500mc  4.4.0-42.62
      linux-image-4.4.0-42-powerpc-smp  4.4.0-42.62
      linux-image-4.4.0-42-powerpc64-emb  4.4.0-42.62
      linux-image-4.4.0-42-powerpc64-smp  4.4.0-42.62
    
    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-3099-1
      CVE-2016-6130, CVE-2016-6480, CVE-2016-6828, CVE-2016-7039
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.4.0-42.62
    
    

    LinuxSecurity Poll

    If you are using full-disk encryption: are you concerned about the resulting performance hit?

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    /main-polls/34-if-you-are-using-full-disk-encryption-are-you-concerned-about-the-resulting-performance-hit?task=poll.vote&format=json
    34
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    [{"id":"120","title":"Yes","votes":"7","type":"x","order":"1","pct":63.64,"resources":[]},{"id":"121","title":"No ","votes":"4","type":"x","order":"2","pct":36.36,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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