Ubuntu 2843-2: Linux kernel (Wily HWE) vulnerabilities

    Date 17 Dec 2015
    91
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the kernel.
    ==========================================================================
    Ubuntu Security Notice USN-2843-2
    December 17, 2015
    
    linux-lts-wily vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 LTS
    
    Summary:
    
    Several security issues were fixed in the kernel.
    
    Software Description:
    - linux-lts-wily: Linux hardware enablement kernel from Wily
    
    Details:
    
    Jan Beulich discovered that the KVM svm hypervisor implementation in the
    Linux kernel did not properly catch Debug exceptions on AMD processors. An
    attacker in a guest virtual machine could use this to cause a denial of
    service (system crash) in the host OS. (CVE-2015-8104)
    
    郭永刚 discovered that the ppp implementation in the Linux kernel did
    not ensure that certain slot numbers are valid. A local attacker with the
    privilege to call ioctl() on /dev/ppp could cause a denial of service
    (system crash). (CVE-2015-7799)
    
    Dmitry Vyukov discovered that the Linux kernel's keyring handler attempted
    to garbage collect incompletely instantiated keys. A local unprivileged
    attacker could use this to cause a denial of service (system crash).
    (CVE-2015-7872)
    
    It was discovered that the virtual video osd test driver in the Linux
    kernel did not properly initialize data structures. A local attacker could
    use this to obtain sensitive information from the kernel. (CVE-2015-7884)
    
    It was discovered that the driver for Digi Neo and ClassicBoard devices did
    not properly initialize data structures. A local attacker could use this to
    obtain sensitive information from the kernel. (CVE-2015-7885)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 LTS:
      linux-image-4.2.0-21-generic    4.2.0-21.25~14.04.1
      linux-image-4.2.0-21-generic-lpae  4.2.0-21.25~14.04.1
      linux-image-4.2.0-21-lowlatency  4.2.0-21.25~14.04.1
      linux-image-4.2.0-21-powerpc-e500mc  4.2.0-21.25~14.04.1
      linux-image-4.2.0-21-powerpc-smp  4.2.0-21.25~14.04.1
      linux-image-4.2.0-21-powerpc64-emb  4.2.0-21.25~14.04.1
      linux-image-4.2.0-21-powerpc64-smp  4.2.0-21.25~14.04.1
    
    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. If
    you use linux-restricted-modules, you have to update that package as
    well to get modules which work with the new kernel version. Unless you
    manually uninstalled the standard kernel metapackages (e.g. linux-generic,
    linux-server, linux-powerpc), a standard system upgrade will automatically
    perform this as well.
    
    References:
      https://www.ubuntu.com/usn/usn-2843-2
      https://www.ubuntu.com/usn/usn-2843-1
      CVE-2015-7799, CVE-2015-7872, CVE-2015-7884, CVE-2015-7885,
      CVE-2015-8104
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-lts-wily/4.2.0-21.25~14.04.1
    
    

    LinuxSecurity Poll

    Do you feel that the Lawful Access to Encrypted Data Act, which aims to force encryption backdoors, is a threat to US citizens' privacy?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/30-do-you-feel-that-the-lawful-access-to-encrypted-data-act-which-aims-to-force-encryption-backdoors-is-a-threat-to-privacy?task=poll.vote&format=json
    30
    radio
    [{"id":"106","title":"Yes - I am a privacy advocate and I am strongly opposed to this bill.","votes":"19","type":"x","order":"1","pct":95,"resources":[]},{"id":"107","title":"I'm undecided - it has its pros and cons.","votes":"1","type":"x","order":"2","pct":5,"resources":[]},{"id":"108","title":"No - I support this bill and feel that it will help protect against crime and threats to our national security. ","votes":"0","type":"x","order":"3","pct":0,"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
    bottom 200

    Advisories

    Please enable / Bitte aktiviere JavaScript!
    Veuillez activer / Por favor activa el Javascript![ ? ]

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.