Ubuntu 4163-1: Linux kernel vulnerabilities

    Date21 Oct 2019
    CategoryUbuntu
    366
    Posted ByLinuxSecurity Advisories
    Ubuntu Large
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4163-1
    October 22, 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:
    
    It was discovered that a race condition existed in the ARC EMAC ethernet
    driver for the Linux kernel, resulting in a use-after-free vulnerability.
    An attacker could use this to cause a denial of service (system crash).
    (CVE-2016-10906)
    
    It was discovered that a race condition existed in the Serial Attached SCSI
    (SAS) implementation in the Linux kernel when handling certain error
    conditions. A local attacker could use this to cause a denial of service
    (kernel deadlock). (CVE-2017-18232)
    
    It was discovered that the RSI 91x Wi-Fi driver in the Linux kernel did not
    did not handle detach operations correctly, leading to a use-after-free
    vulnerability. A physically proximate attacker could use this to cause a
    denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2018-21008)
    
    Wen Huang discovered that the Marvell Wi-Fi device driver in the Linux
    kernel did not properly perform bounds checking, leading to a heap
    overflow. A local attacker could use this to cause a denial of service
    (system crash) or possibly execute arbitrary code. (CVE-2019-14814,
    CVE-2019-14816)
    
    Matt Delco discovered that the KVM hypervisor implementation in the Linux
    kernel did not properly perform bounds checking when handling coalesced
    MMIO write operations. A local attacker with write access to /dev/kvm could
    use this to cause a denial of service (system crash). (CVE-2019-14821)
    
    Hui Peng and Mathias Payer discovered that the USB audio driver for the
    Linux kernel did not properly validate device meta data. A physically
    proximate attacker could use this to cause a denial of service (system
    crash). (CVE-2019-15117)
    
    Hui Peng and Mathias Payer discovered that the USB audio driver for the
    Linux kernel improperly performed recursion while handling device meta
    data. A physically proximate attacker could use this to cause a denial of
    service (system crash). (CVE-2019-15118)
    
    It was discovered that the Technisat DVB-S/S2 USB device driver in the
    Linux kernel contained a buffer overread. A physically proximate attacker
    could use this to cause a denial of service (system crash) or possibly
    expose sensitive information. (CVE-2019-15505)
    
    Brad Spengler discovered that a Spectre mitigation was improperly
    implemented in the ptrace susbsystem of the Linux kernel. A local attacker
    could possibly use this to expose sensitive information. (CVE-2019-15902)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.04 LTS:
      linux-image-4.4.0-1060-kvm      4.4.0-1060.67
      linux-image-4.4.0-1096-aws      4.4.0-1096.107
      linux-image-4.4.0-1124-raspi2   4.4.0-1124.133
      linux-image-4.4.0-1128-snapdragon  4.4.0-1128.136
      linux-image-4.4.0-166-generic   4.4.0-166.195
      linux-image-4.4.0-166-generic-lpae  4.4.0-166.195
      linux-image-4.4.0-166-lowlatency  4.4.0-166.195
      linux-image-4.4.0-166-powerpc-e500mc  4.4.0-166.195
      linux-image-4.4.0-166-powerpc-smp  4.4.0-166.195
      linux-image-4.4.0-166-powerpc64-emb  4.4.0-166.195
      linux-image-4.4.0-166-powerpc64-smp  4.4.0-166.195
      linux-image-aws                 4.4.0.1096.100
      linux-image-generic             4.4.0.166.174
      linux-image-generic-lpae        4.4.0.166.174
      linux-image-kvm                 4.4.0.1060.60
      linux-image-lowlatency          4.4.0.166.174
      linux-image-powerpc-e500mc      4.4.0.166.174
      linux-image-powerpc-smp         4.4.0.166.174
      linux-image-powerpc64-emb       4.4.0.166.174
      linux-image-powerpc64-smp       4.4.0.166.174
      linux-image-raspi2              4.4.0.1124.124
      linux-image-snapdragon          4.4.0.1128.120
      linux-image-virtual             4.4.0.166.174
    
    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/4163-1
      CVE-2016-10906, CVE-2017-18232, CVE-2018-21008, CVE-2019-14814,
      CVE-2019-14816, CVE-2019-14821, CVE-2019-15117, CVE-2019-15118,
      CVE-2019-15505, CVE-2019-15902
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.4.0-166.195
      https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1096.107
      https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1060.67
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1124.133
      https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1128.136
    
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