Ubuntu 4258-1: Linux kernel vulnerabilities

    Date 28 Jan 2020
    272
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4258-1
    January 29, 2020
    
    linux-aws-5.0, linux-gcp, linux-gke-5.0, linux-oracle-5.0 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux-aws-5.0: Linux kernel for Amazon Web Services (AWS) systems
    - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-gke-5.0: Linux kernel for Google Container Engine (GKE) systems
    - linux-oracle-5.0: Linux kernel for Oracle Cloud systems
    
    Details:
    
    It was discovered that the Atheros 802.11ac wireless USB device driver in
    the Linux kernel did not properly validate device metadata. A physically
    proximate attacker could use this to cause a denial of service (system
    crash). (CVE-2019-15099)
    
    It was discovered that a race condition existed in the Virtual Video Test
    Driver in the Linux kernel. An attacker with write access to /dev/video0 on
    a system with the vivid module loaded could possibly use this to gain
    administrative privileges. (CVE-2019-18683)
    
    It was discovered that the btrfs file system in the Linux kernel did not
    properly validate metadata, leading to a NULL pointer dereference. An
    attacker could use this to specially craft a file system image that, when
    mounted, could cause a denial of service (system crash). (CVE-2019-18885)
    
    It was discovered that the crypto subsystem in the Linux kernel did not
    properly deallocate memory in certain error conditions. A local attacker
    could use this to cause a denial of service (kernel memory exhaustion).
    (CVE-2019-19050, CVE-2019-19062)
    
    It was discovered that the RSI 91x WLAN device driver in the Linux kernel
    did not properly deallocate memory in certain error conditions. A local
    attacker could use this to cause a denial of service (kernel memory
    exhaustion). (CVE-2019-19071)
    
    It was discovered that the Broadcom Netxtreme HCA device driver in the
    Linux kernel did not properly deallocate memory in certain error
    conditions. A local attacker could possibly use this to cause a denial of
    service (kernel memory exhaustion). (CVE-2019-19077)
    
    It was discovered that the Atheros 802.11ac wireless USB device driver in
    the Linux kernel did not properly deallocate memory in certain error
    conditions. A local attacker could possibly use this to cause a denial of
    service (kernel memory exhaustion). (CVE-2019-19078)
    
    It was discovered that the Qualcomm IPC Router TUN device driver in the
    Linux kernel did not properly deallocate memory in certain situations. A
    local attacker could possibly use this to cause a denial of service (kernel
    memory exhaustion). (CVE-2019-19079)
    
    It was discovered that the AMD GPU device drivers in the Linux kernel did
    not properly deallocate memory in certain error conditions. A local
    attacker could use this to possibly cause a denial of service (kernel
    memory exhaustion). (CVE-2019-19082)
    
    Dan Carpenter discovered that the AppleTalk networking subsystem of the
    Linux kernel did not properly handle certain error conditions, leading to a
    NULL pointer dereference. A local attacker could use this to cause a denial
    of service (system crash). (CVE-2019-19227)
    
    Or Cohen discovered that the virtual console subsystem in the Linux kernel
    did not properly restrict writes to unimplemented vcsu (unicode) devices. A
    local attacker could possibly use this to cause a denial of service (system
    crash) or have other unspecified impacts. (CVE-2019-19252)
    
    It was discovered that the KVM hypervisor implementation in the Linux
    kernel did not properly handle ioctl requests to get emulated CPUID
    features. An attacker with access to /dev/kvm could use this to cause a
    denial of service (system crash). (CVE-2019-19332)
    
    It was discovered that the ext4 file system implementation in the Linux
    kernel did not properly handle certain conditions. An attacker could use
    this to specially craft an ext4 file system that, when mounted, could cause
    a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2019-19767)
    
    It was discovered that the B2C2 FlexCop USB device driver in the Linux
    kernel did not properly validate device metadata. A physically proximate
    attacker could use this to cause a denial of service (system crash).
    (CVE-2019-15291)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      linux-image-5.0.0-1010-oracle   5.0.0-1010.15~18.04.1
      linux-image-5.0.0-1024-aws      5.0.0-1024.27~18.04.1
      linux-image-5.0.0-1029-gcp      5.0.0-1029.30~18.04.1
      linux-image-5.0.0-1029-gke      5.0.0-1029.30~18.04.1
      linux-image-aws-edge            5.0.0.1024.38
      linux-image-gcp                 5.0.0.1029.33
      linux-image-gke-5.0             5.0.0.1029.17
      linux-image-oracle-edge         5.0.0.1010.9
    
    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/4258-1
      CVE-2019-15099, CVE-2019-15291, CVE-2019-18683, CVE-2019-18885,
      CVE-2019-19050, CVE-2019-19062, CVE-2019-19071, CVE-2019-19077,
      CVE-2019-19078, CVE-2019-19079, CVE-2019-19082, CVE-2019-19227,
      CVE-2019-19252, CVE-2019-19332, CVE-2019-19767
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux-aws-5.0/5.0.0-1024.27~18.04.1
      https://launchpad.net/ubuntu/+source/linux-gcp/5.0.0-1029.30~18.04.1
      https://launchpad.net/ubuntu/+source/linux-gke-5.0/5.0.0-1029.30~18.04.1
      https://launchpad.net/ubuntu/+source/linux-oracle-5.0/5.0.0-1010.15~18.04.1
    

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