Ubuntu 4008-1: Linux kernel vulnerabilities

    Date04 Jun 2019
    CategoryUbuntu
    20
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4008-1
    June 04, 2019
    
    linux, linux-aws, linux-kvm, linux-raspi2, linux-snapdragon vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 16.04 LTS
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux: Linux kernel
    - linux-aws: Linux kernel for Amazon Web Services (AWS) systems
    - linux-kvm: Linux kernel for cloud environments
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    - linux-snapdragon: Linux kernel for Snapdragon processors
    
    Details:
    
    Robert Święcki discovered that the Linux kernel did not properly apply
    Address Space Layout Randomization (ASLR) in some situations for setuid elf
    binaries. A local attacker could use this to improve the chances of
    exploiting an existing vulnerability in a setuid elf binary.
    (CVE-2019-11190)
    
    It was discovered that a null pointer dereference vulnerability existed in
    the LSI Logic MegaRAID driver in the Linux kernel. A local attacker could
    use this to cause a denial of service (system crash). (CVE-2019-11810)
    
    It was discovered that a race condition leading to a use-after-free existed
    in the Reliable Datagram Sockets (RDS) protocol implementation in the Linux
    kernel. The RDS protocol is blacklisted by default in Ubuntu. If enabled, a
    local attacker could use this to cause a denial of service (system crash)
    or possibly execute arbitrary code. (CVE-2019-11815)
    
    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.
    (CVE-2019-11191)
    
    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 16.04 LTS:
      linux-image-4.4.0-1047-kvm      4.4.0-1047.53
      linux-image-4.4.0-1084-aws      4.4.0-1084.94
      linux-image-4.4.0-1110-raspi2   4.4.0-1110.118
      linux-image-4.4.0-1114-snapdragon  4.4.0-1114.119
      linux-image-4.4.0-150-generic   4.4.0-150.176
      linux-image-4.4.0-150-generic-lpae  4.4.0-150.176
      linux-image-4.4.0-150-lowlatency  4.4.0-150.176
      linux-image-4.4.0-150-powerpc-e500mc  4.4.0-150.176
      linux-image-4.4.0-150-powerpc-smp  4.4.0-150.176
      linux-image-4.4.0-150-powerpc64-emb  4.4.0-150.176
      linux-image-4.4.0-150-powerpc64-smp  4.4.0-150.176
      linux-image-aws                 4.4.0.1084.87
      linux-image-generic             4.4.0.150.158
      linux-image-generic-lpae        4.4.0.150.158
      linux-image-kvm                 4.4.0.1047.47
      linux-image-lowlatency          4.4.0.150.158
      linux-image-powerpc-e500mc      4.4.0.150.158
      linux-image-powerpc-smp         4.4.0.150.158
      linux-image-powerpc64-emb       4.4.0.150.158
      linux-image-powerpc64-smp       4.4.0.150.158
      linux-image-raspi2              4.4.0.1110.110
      linux-image-snapdragon          4.4.0.1114.106
      linux-image-virtual             4.4.0.150.158
    
    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/4008-1
      CVE-2019-11190, CVE-2019-11191, CVE-2019-11810, CVE-2019-11815
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.4.0-150.176
      https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1084.94
      https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1047.53
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1110.118
      https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1114.119
    
    
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