Ubuntu 4286-1: Linux kernel vulnerabilities

    Date18 Feb 2020
    199
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4286-1
    February 18, 2020
    
    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 the Linux kernel did not properly clear data
    structures on context switches for certain Intel graphics processors. A
    local attacker could use this to expose sensitive information.
    (CVE-2019-14615)
    
    It was discovered that a race condition existed in the Softmac USB Prism54
    device driver in the Linux kernel. A physically proximate attacker could
    use this to cause a denial of service (system crash). (CVE-2019-15220)
    
    Julien Grall discovered that the Xen balloon memory driver in the Linux
    kernel did not properly restrict the amount of memory set aside for page
    mappings in some situations. An attacker could use this to cause a denial
    of service (kernel memory exhaustion). (CVE-2019-17351)
    
    It was discovered that the Intel WiMAX 2400 driver in the Linux kernel did
    not properly deallocate memory in certain situations. A local attacker
    could use this to cause a denial of service (kernel memory exhaustion).
    (CVE-2019-19051)
    
    It was discovered that the Marvell Wi-Fi device driver 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-2019-19056)
    
    It was discovered that the Brocade BFA Fibre Channel 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-2019-19066)
    
    It was discovered that the Realtek RTL8xxx USB Wi-Fi 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-2019-19068)
    
    Gao Chuan discovered that the SAS Class driver in the Linux kernel
    contained a race condition that could lead to a NULL pointer dereference. A
    local attacker could possibly use this to cause a denial of service (system
    crash). (CVE-2019-19965)
    
    It was discovered that the Datagram Congestion Control Protocol (DCCP)
    implementation in the Linux kernel did not properly deallocate memory in
    certain error conditions. An attacker could possibly use this to cause a
    denial of service (kernel memory exhaustion). (CVE-2019-20096)
    
    Mitchell Frank discovered that the Wi-Fi implementation in the Linux kernel
    when used as an access point would send IAPP location updates for stations
    before client authentication had completed. A physically proximate attacker
    could use this to cause a denial of service. (CVE-2019-5108)
    
    It was discovered that ZR364XX Camera USB device driver for the Linux
    kernel did not properly initialize memory. A physically proximate attacker
    could use this to cause a denial of service (system crash).
    (CVE-2019-15217)
    
    It was discovered that the Line 6 POD USB device driver in the Linux kernel
    did not properly validate data size information from the device. A
    physically proximate attacker could use this to cause a denial of service
    (system crash). (CVE-2019-15221)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 16.04 LTS:
      linux-image-4.4.0-1066-kvm      4.4.0-1066.73
      linux-image-4.4.0-1102-aws      4.4.0-1102.113
      linux-image-4.4.0-1129-raspi2   4.4.0-1129.138
      linux-image-4.4.0-1133-snapdragon  4.4.0-1133.141
      linux-image-4.4.0-174-generic   4.4.0-174.204
      linux-image-4.4.0-174-generic-lpae  4.4.0-174.204
      linux-image-4.4.0-174-lowlatency  4.4.0-174.204
      linux-image-4.4.0-174-powerpc-e500mc  4.4.0-174.204
      linux-image-4.4.0-174-powerpc-smp  4.4.0-174.204
      linux-image-4.4.0-174-powerpc64-emb  4.4.0-174.204
      linux-image-4.4.0-174-powerpc64-smp  4.4.0-174.204
      linux-image-aws                 4.4.0.1102.106
      linux-image-generic             4.4.0.174.182
      linux-image-generic-lpae        4.4.0.174.182
      linux-image-kvm                 4.4.0.1066.66
      linux-image-lowlatency          4.4.0.174.182
      linux-image-powerpc-e500mc      4.4.0.174.182
      linux-image-powerpc-smp         4.4.0.174.182
      linux-image-powerpc64-emb       4.4.0.174.182
      linux-image-powerpc64-smp       4.4.0.174.182
      linux-image-raspi2              4.4.0.1129.129
      linux-image-snapdragon          4.4.0.1133.125
      linux-image-virtual             4.4.0.174.182
    
    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/4286-1
      CVE-2019-14615, CVE-2019-15217, CVE-2019-15220, CVE-2019-15221,
      CVE-2019-17351, CVE-2019-19051, CVE-2019-19056, CVE-2019-19066,
      CVE-2019-19068, CVE-2019-19965, CVE-2019-20096, CVE-2019-5108
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.4.0-174.204
      https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1102.113
      https://launchpad.net/ubuntu/+source/linux-kvm/4.4.0-1066.73
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.4.0-1129.138
      https://launchpad.net/ubuntu/+source/linux-snapdragon/4.4.0-1133.141
    

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