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    Ubuntu 4526-1: Linux kernel vulnerabilities

    Date
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    Posted By
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4526-1
    September 22, 2020
    
    linux, linux-aws, linux-aws-hwe, linux-azure, linux-azure-4.15, linux-gcp,
    linux-gcp-4.15, linux-gke-4.15, linux-hwe, linux-oem, linux-oracle,
    linux-raspi2, linux-snapdragon vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 18.04 LTS
    - Ubuntu 16.04 LTS
    - Ubuntu 14.04 ESM
    
    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-azure-4.15: Linux kernel for Microsoft Azure Cloud systems
    - linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems
    - linux-oem: Linux kernel for OEM systems
    - linux-oracle: Linux kernel for Oracle Cloud systems
    - linux-raspi2: Linux kernel for Raspberry Pi (V8) systems
    - linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors
    - linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems
    - linux-azure: Linux kernel for Microsoft Azure Cloud systems
    - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-hwe: Linux hardware enablement (HWE) kernel
    
    Details:
    
    It was discovered that the AMD Cryptographic Coprocessor device driver in
    the Linux kernel did not properly deallocate memory in some situations. A
    local attacker could use this to cause a denial of service (memory
    exhaustion). (CVE-2019-18808)
    
    It was discovered that the Conexant 23885 TV card device driver for the
    Linux kernel did not properly deallocate memory in some error conditions. A
    local attacker could use this to cause a denial of service (memory
    exhaustion). (CVE-2019-19054)
    
    It was discovered that the ADIS16400 IIO IMU Driver for the Linux kernel
    did not properly deallocate memory in certain error conditions. A local
    attacker could use this to cause a denial of service (memory exhaustion).
    (CVE-2019-19061)
    
    It was discovered that the AMD Audio Coprocessor driver for the Linux
    kernel did not properly deallocate memory in certain error conditions. A
    local attacker with the ability to load modules could use this to cause a
    denial of service (memory exhaustion). (CVE-2019-19067)
    
    It was discovered that the Atheros HTC based wireless driver in the Linux
    kernel did not properly deallocate in certain error conditions. A local
    attacker could use this to cause a denial of service (memory exhaustion).
    (CVE-2019-19073, CVE-2019-19074)
    
    It was discovered that the F2FS file system in the Linux kernel did not
    properly perform bounds checking in some situations, leading to an out-of-
    bounds read. A local attacker could possibly use this to expose sensitive
    information (kernel memory). (CVE-2019-9445)
    
    It was discovered that the VFIO PCI driver in the Linux kernel did not
    properly handle attempts to access disabled memory spaces. A local attacker
    could use this to cause a denial of service (system crash).
    (CVE-2020-12888)
    
    It was discovered that the cgroup v2 subsystem in the Linux kernel did not
    properly perform reference counting in some situations, leading to a NULL
    pointer dereference. A local attacker could use this to cause a denial of
    service or possibly gain administrative privileges. (CVE-2020-14356)
    
    It was discovered that the state of network RNG in the Linux kernel was
    potentially observable. A remote attacker could use this to expose
    sensitive information. (CVE-2020-16166)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      linux-image-4.15.0-1054-oracle  4.15.0-1054.58
      linux-image-4.15.0-1070-gke     4.15.0-1070.73
      linux-image-4.15.0-1071-raspi2  4.15.0-1071.75
      linux-image-4.15.0-1083-aws     4.15.0-1083.87
      linux-image-4.15.0-1084-gcp     4.15.0-1084.95
      linux-image-4.15.0-1087-snapdragon  4.15.0-1087.95
      linux-image-4.15.0-1096-azure   4.15.0-1096.106
      linux-image-4.15.0-1097-oem     4.15.0-1097.107
      linux-image-4.15.0-118-generic  4.15.0-118.119
      linux-image-4.15.0-118-generic-lpae  4.15.0-118.119
      linux-image-4.15.0-118-lowlatency  4.15.0-118.119
      linux-image-aws-lts-18.04       4.15.0.1083.85
      linux-image-azure-lts-18.04     4.15.0.1096.69
      linux-image-gcp-lts-18.04       4.15.0.1084.102
      linux-image-generic             4.15.0.118.105
      linux-image-generic-lpae        4.15.0.118.105
      linux-image-gke                 4.15.0.1070.74
      linux-image-gke-4.15            4.15.0.1070.74
      linux-image-lowlatency          4.15.0.118.105
      linux-image-oem                 4.15.0.1097.101
      linux-image-oracle-lts-18.04    4.15.0.1054.64
      linux-image-powerpc-e500mc      4.15.0.118.105
      linux-image-powerpc-smp         4.15.0.118.105
      linux-image-powerpc64-emb       4.15.0.118.105
      linux-image-powerpc64-smp       4.15.0.118.105
      linux-image-raspi2              4.15.0.1071.68
      linux-image-snapdragon          4.15.0.1087.90
      linux-image-virtual             4.15.0.118.105
    
    Ubuntu 16.04 LTS:
      linux-image-4.15.0-1054-oracle  4.15.0-1054.58~16.04.1
      linux-image-4.15.0-1083-aws     4.15.0-1083.87~16.04.1
      linux-image-4.15.0-1084-gcp     4.15.0-1084.95~16.04.1
      linux-image-4.15.0-1096-azure   4.15.0-1096.106~16.04.1
      linux-image-4.15.0-118-generic  4.15.0-118.119~16.04.1
      linux-image-4.15.0-118-generic-lpae  4.15.0-118.119~16.04.1
      linux-image-4.15.0-118-lowlatency  4.15.0-118.119~16.04.1
      linux-image-aws-hwe             4.15.0.1083.79
      linux-image-azure               4.15.0.1096.90
      linux-image-azure-edge          4.15.0.1096.90
      linux-image-gcp                 4.15.0.1084.85
      linux-image-generic-hwe-16.04   4.15.0.118.119
      linux-image-generic-lpae-hwe-16.04  4.15.0.118.119
      linux-image-gke                 4.15.0.1084.85
      linux-image-lowlatency-hwe-16.04  4.15.0.118.119
      linux-image-oem                 4.15.0.118.119
      linux-image-oracle              4.15.0.1054.44
      linux-image-virtual-hwe-16.04   4.15.0.118.119
    
    Ubuntu 14.04 ESM:
      linux-image-4.15.0-1096-azure   4.15.0-1096.106~14.04.1
      linux-image-azure               4.15.0.1096.72
    
    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/4526-1
      CVE-2019-18808, CVE-2019-19054, CVE-2019-19061, CVE-2019-19067,
      CVE-2019-19073, CVE-2019-19074, CVE-2019-9445, CVE-2020-12888,
      CVE-2020-14356, CVE-2020-16166
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.15.0-118.119
      https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1083.87
      https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1096.106
      https://launchpad.net/ubuntu/+source/linux-gcp-4.15/4.15.0-1084.95
      https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1070.73
      https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1097.107
      https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1054.58
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1071.75
      https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1087.95
      https://launchpad.net/ubuntu/+source/linux-aws-hwe/4.15.0-1083.87~16.04.1
      https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1096.106~16.04.1
      https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1084.95~16.04.1
      https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-118.119~16.04.1
      https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1054.58~16.04.1
    

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