Ubuntu 4185-2: Linux kernel (Azure) vulnerabilities

    Date12 Nov 2019
    CategoryUbuntu
    33
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4185-2
    November 13, 2019
    
    linux-azure vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 14.04 ESM
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-azure: Linux kernel for Microsoft Azure Cloud systems
    
    Details:
    
    Stephan van Schaik, Alyssa Milburn, Sebastian Österlund, Pietro Frigo,
    Kaveh Razavi, Herbert Bos, Cristiano Giuffrida, Giorgi Maisuradze, Moritz
    Lipp, Michael Schwarz, Daniel Gruss, and Jo Van Bulck discovered that Intel
    processors using Transactional Synchronization Extensions (TSX) could
    expose memory contents previously stored in microarchitectural buffers to a
    malicious process that is executing on the same CPU core. A local attacker
    could use this to expose sensitive information. (CVE-2019-11135)
    
    Deepak Gupta discovered that on certain Intel processors, the Linux kernel
    did not properly perform invalidation on page table updates by virtual
    guest operating systems. A local attacker in a guest VM could use this to
    cause a denial of service (host system crash). (CVE-2018-12207)
    
    Ori Nimron discovered that the AX25 network protocol implementation in the
    Linux kernel did not properly perform permissions checks. A local attacker
    could use this to create a raw socket. (CVE-2019-17052)
    
    Ori Nimron discovered that the IEEE 802.15.4 Low-Rate Wireless network
    protocol implementation in the Linux kernel did not properly perform
    permissions checks. A local attacker could use this to create a raw socket.
    (CVE-2019-17053)
    
    Ori Nimron discovered that the Appletalk network protocol implementation in
    the Linux kernel did not properly perform permissions checks. A local
    attacker could use this to create a raw socket. (CVE-2019-17054)
    
    Ori Nimron discovered that the modular ISDN network protocol implementation
    in the Linux kernel did not properly perform permissions checks. A local
    attacker could use this to create a raw socket. (CVE-2019-17055)
    
    Ori Nimron discovered that the Near field Communication (NFC) network
    protocol implementation in the Linux kernel did not properly perform
    permissions checks. A local attacker could use this to create a raw socket.
    (CVE-2019-17056)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 14.04 ESM:
      linux-image-4.15.0-1063-azure   4.15.0-1063.68~14.04.1
      linux-image-azure               4.15.0.1063.49
    
    Please note that mitigating the TSX (CVE-2019-11135) issue requires
    a corresponding Intel processor microcode update.
    
    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/4185-2
      https://usn.ubuntu.com/4185-1
      CVE-2018-12207, CVE-2019-11135, CVE-2019-17052, CVE-2019-17053,
      CVE-2019-17054, CVE-2019-17055, CVE-2019-17056,
      https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/TAA_MCEPSC_i915
    
    
    You are not authorised to post comments.

    Comments powered by CComment

    LinuxSecurity Poll

    What do you think of the articles on LinuxSecurity?

    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/24-what-do-you-think-of-the-quality-of-the-articles-on-linuxsecurity?task=poll.vote&format=json
    24
    radio
    [{"id":"87","title":"Excellent, don't change a thing!","votes":"64","type":"x","order":"1","pct":57.14,"resources":[]},{"id":"88","title":"Should be more technical","votes":"15","type":"x","order":"2","pct":13.39,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"33","type":"x","order":"3","pct":29.46,"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
    bottom200

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