Ubuntu 4006-1: Linux kernel vulnerability

    Date04 Jun 2019
    CategoryUbuntu
    23
    Posted ByLinuxSecurity Advisories
    A system hardening measure could be bypassed.
    ==========================================================================
    Ubuntu Security Notice USN-4006-1
    June 04, 2019
    
    linux, linux-aws, linux-gcp, linux-kvm, linux-raspi2 vulnerability
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.10
    
    Summary:
    
    A system hardening measure could be bypassed.
    
    Software Description:
    - linux: Linux kernel
    - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
    - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-kvm: Linux kernel for cloud environments
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    
    Details:
    
    Federico Manuel Bento discovered that the Linux kernel did not properly
    apply Address Space Layout Randomization (ASLR) in some situations for
    setuid a.out binaries. A local attacker could use this to improve the
    chances of exploiting an existing vulnerability in a setuid a.out binary.
    
    As a hardening measure, this update disables a.out support.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.10:
      linux-image-4.18.0-1012-gcp     4.18.0-1012.13
      linux-image-4.18.0-1013-kvm     4.18.0-1013.13
      linux-image-4.18.0-1015-raspi2  4.18.0-1015.17
      linux-image-4.18.0-1017-aws     4.18.0-1017.19
      linux-image-4.18.0-21-generic   4.18.0-21.22
      linux-image-4.18.0-21-generic-lpae  4.18.0-21.22
      linux-image-4.18.0-21-lowlatency  4.18.0-21.22
      linux-image-4.18.0-21-snapdragon  4.18.0-21.22
      linux-image-aws                 4.18.0.1017.17
      linux-image-gcp                 4.18.0.1012.12
      linux-image-generic             4.18.0.21.22
      linux-image-generic-lpae        4.18.0.21.22
      linux-image-gke                 4.18.0.1012.12
      linux-image-kvm                 4.18.0.1013.13
      linux-image-lowlatency          4.18.0.21.22
      linux-image-raspi2              4.18.0.1015.12
      linux-image-snapdragon          4.18.0.21.22
    
    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/4006-1
      CVE-2019-11191
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.18.0-21.22
      https://launchpad.net/ubuntu/+source/linux-aws/4.18.0-1017.19
      https://launchpad.net/ubuntu/+source/linux-gcp/4.18.0-1012.13
      https://launchpad.net/ubuntu/+source/linux-kvm/4.18.0-1013.13
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.18.0-1015.17
    
    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":"25","type":"x","order":"1","pct":54.35,"resources":[]},{"id":"88","title":"Should be more technical","votes":"5","type":"x","order":"2","pct":10.87,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"16","type":"x","order":"3","pct":34.78,"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.