Ubuntu 4094-1: Linux kernel vulnerabilities

    Date13 Aug 2019
    CategoryUbuntu
    1835
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in the Linux kernel.
    ==========================================================================
    Ubuntu Security Notice USN-4094-1
    August 13, 2019
    
    linux, linux-hwe, linux-azure, linux-gcp, linux-gke-4.15, linux-kvm,
    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
    
    Summary:
    
    Several security issues were fixed in the Linux kernel.
    
    Software Description:
    - linux: Linux kernel
    - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
    - linux-gke-4.15: Linux kernel for Google Container Engine (GKE) systems
    - linux-kvm: Linux kernel for cloud environments
    - linux-oem: Linux kernel for OEM processors
    - linux-oracle: Linux kernel for Oracle Cloud systems
    - linux-raspi2: Linux kernel for Raspberry Pi 2
    - linux-snapdragon: Linux kernel for Snapdragon processors
    - linux-azure: Linux kernel for Microsoft Azure Cloud systems
    - linux-hwe: Linux hardware enablement (HWE) kernel
    
    Details:
    
    It was discovered that the alarmtimer implementation in the Linux kernel
    contained an integer overflow vulnerability. A local attacker could use
    this to cause a denial of service. (CVE-2018-13053)
    
    Wen Xu discovered that the XFS filesystem implementation in the Linux
    kernel did not properly track inode validations. An attacker could use this
    to construct a malicious XFS image that, when mounted, could cause a denial
    of service (system crash). (CVE-2018-13093)
    
    Wen Xu discovered that the f2fs file system implementation in the
    Linux kernel did not properly validate metadata. An attacker could
    use this to construct a malicious f2fs image that, when mounted,
    could cause a denial of service (system crash). (CVE-2018-13097,
    CVE-2018-13099, CVE-2018-13100, CVE-2018-14614, CVE-2018-14616,
    CVE-2018-13096, CVE-2018-13098, CVE-2018-14615)
    
    Wen Xu and Po-Ning Tseng discovered that btrfs file system
    implementation in the Linux kernel did not properly validate
    metadata. An attacker could use this to construct a malicious
    btrfs image that, when mounted, could cause a denial of service
    (system crash). (CVE-2018-14610, CVE-2018-14611, CVE-2018-14612,
    CVE-2018-14613, CVE-2018-14609)
    
    Wen Xu discovered that the HFS+ filesystem implementation in the Linux
    kernel did not properly handle malformed catalog data in some situations.
    An attacker could use this to construct a malicious HFS+ image that, when
    mounted, could cause a denial of service (system crash). (CVE-2018-14617)
    
    Vasily Averin and Pavel Tikhomirov discovered that the cleancache subsystem
    of the Linux kernel did not properly initialize new files in some
    situations. A local attacker could use this to expose sensitive
    information. (CVE-2018-16862)
    
    Hui Peng and Mathias Payer discovered that the USB subsystem in the Linux
    kernel did not properly handle size checks when handling an extra USB
    descriptor. A physically proximate attacker could use this to cause a
    denial of service (system crash). (CVE-2018-20169)
    
    It was discovered that a use-after-free error existed in the block layer
    subsystem of the Linux kernel when certain failure conditions occurred. A
    local attacker could possibly use this to cause a denial of service (system
    crash) or possibly execute arbitrary code. (CVE-2018-20856)
    
    Eli Biham and Lior Neumann discovered that the Bluetooth implementation in
    the Linux kernel did not properly validate elliptic curve parameters during
    Diffie-Hellman key exchange in some situations. An attacker could use this
    to expose sensitive information. (CVE-2018-5383)
    
    It was discovered that a heap buffer overflow existed in the Marvell
    Wireless LAN device driver for the Linux kernel. An attacker could use this
    to cause a denial of service (system crash) or possibly execute arbitrary
    code. (CVE-2019-10126)
    
    Andrei Vlad Lutas and Dan Lutas discovered that some x86 processors
    incorrectly handle SWAPGS instructions during speculative execution. A
    local attacker could use this to expose sensitive information (kernel
    memory). (CVE-2019-1125)
    
    It was discovered that the PowerPC dlpar implementation in the Linux kernel
    did not properly check for allocation errors in some situations. A local
    attacker could possibly use this to cause a denial of service (system
    crash). (CVE-2019-12614)
    
    It was discovered that a NULL pointer dereference vulnerabilty existed in
    the Near-field communication (NFC) implementation in the Linux kernel. An
    attacker could use this to cause a denial of service (system crash).
    (CVE-2019-12818)
    
    It was discovered that the MDIO bus devices subsystem in the Linux kernel
    improperly dropped a device reference in an error condition, leading to a
    use-after-free. An attacker could use this to cause a denial of service
    (system crash). (CVE-2019-12819)
    
    It was discovered that a NULL pointer dereference vulnerability existed in
    the Near-field communication (NFC) implementation in the Linux kernel. A
    local attacker could use this to cause a denial of service (system crash).
    (CVE-2019-12984)
    
    Jann Horn discovered a use-after-free vulnerability in the Linux kernel
    when accessing LDT entries in some situations. A local attacker could use
    this to cause a denial of service (system crash) or possibly execute
    arbitrary code. (CVE-2019-13233)
    
    Jann Horn discovered that the ptrace implementation in the Linux kernel did
    not properly record credentials in some situations. A local attacker could
    use this to cause a denial of service (system crash) or possibly gain
    administrative privileges. (CVE-2019-13272)
    
    It was discovered that the Empia EM28xx DVB USB device driver
    implementation in the Linux kernel contained a use-after-free vulnerability
    when disconnecting the device. An attacker could use this to cause a denial
    of service (system crash). (CVE-2019-2024)
    
    It was discovered that the USB video device class implementation in the
    Linux kernel did not properly validate control bits, resulting in an out of
    bounds buffer read. A local attacker could use this to possibly expose
    sensitive information (kernel memory). (CVE-2019-2101)
    
    It was discovered that the Marvell Wireless LAN device driver in the Linux
    kernel did not properly validate the BSS descriptor. A local attacker could
    possibly use this to cause a denial of service (system crash) or possibly
    execute arbitrary code. (CVE-2019-3846)
    
    It was discovered that the Appletalk IP encapsulation driver in the Linux
    kernel did not properly prevent kernel addresses from being copied to user
    space. A local attacker with the CAP_NET_ADMIN capability could use this to
    expose sensitive information. (CVE-2018-20511)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 18.04 LTS:
      linux-image-4.15.0-1021-oracle  4.15.0-1021.23
      linux-image-4.15.0-1040-gcp     4.15.0-1040.42
      linux-image-4.15.0-1040-gke     4.15.0-1040.42
      linux-image-4.15.0-1042-kvm     4.15.0-1042.42
      linux-image-4.15.0-1043-raspi2  4.15.0-1043.46
      linux-image-4.15.0-1050-oem     4.15.0-1050.57
      linux-image-4.15.0-1060-snapdragon  4.15.0-1060.66
      linux-image-4.15.0-58-generic   4.15.0-58.64
      linux-image-4.15.0-58-generic-lpae  4.15.0-58.64
      linux-image-4.15.0-58-lowlatency  4.15.0-58.64
      linux-image-gcp                 4.15.0.1040.42
      linux-image-generic             4.15.0.58.60
      linux-image-generic-lpae        4.15.0.58.60
      linux-image-gke                 4.15.0.1040.43
      linux-image-gke-4.15            4.15.0.1040.43
      linux-image-kvm                 4.15.0.1042.42
      linux-image-lowlatency          4.15.0.58.60
      linux-image-oem                 4.15.0.1050.54
      linux-image-oracle              4.15.0.1021.24
      linux-image-powerpc-e500mc      4.15.0.58.60
      linux-image-powerpc-smp         4.15.0.58.60
      linux-image-powerpc64-emb       4.15.0.58.60
      linux-image-powerpc64-smp       4.15.0.58.60
      linux-image-raspi2              4.15.0.1043.41
      linux-image-snapdragon          4.15.0.1060.63
      linux-image-virtual             4.15.0.58.60
    
    Ubuntu 16.04 LTS:
      linux-image-4.15.0-1021-oracle  4.15.0-1021.23~16.04.1
      linux-image-4.15.0-1040-gcp     4.15.0-1040.42~16.04.1
      linux-image-4.15.0-1055-azure   4.15.0-1055.60
      linux-image-4.15.0-58-generic   4.15.0-58.64~16.04.1
      linux-image-4.15.0-58-generic-lpae  4.15.0-58.64~16.04.1
      linux-image-4.15.0-58-lowlatency  4.15.0-58.64~16.04.1
      linux-image-azure               4.15.0.1055.58
      linux-image-gcp                 4.15.0.1040.54
      linux-image-generic-hwe-16.04   4.15.0.58.79
      linux-image-generic-lpae-hwe-16.04  4.15.0.58.79
      linux-image-gke                 4.15.0.1040.54
      linux-image-lowlatency-hwe-16.04  4.15.0.58.79
      linux-image-oem                 4.15.0.58.79
      linux-image-oracle              4.15.0.1021.15
      linux-image-virtual-hwe-16.04   4.15.0.58.79
    
    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/4094-1
      CVE-2018-13053, CVE-2018-13093, CVE-2018-13096, CVE-2018-13097,
      CVE-2018-13098, CVE-2018-13099, CVE-2018-13100, CVE-2018-14609,
      CVE-2018-14610, CVE-2018-14611, CVE-2018-14612, CVE-2018-14613,
      CVE-2018-14614, CVE-2018-14615, CVE-2018-14616, CVE-2018-14617,
      CVE-2018-16862, CVE-2018-20169, CVE-2018-20511, CVE-2018-20856,
      CVE-2018-5383, CVE-2019-10126, CVE-2019-1125, CVE-2019-12614,
      CVE-2019-12818, CVE-2019-12819, CVE-2019-12984, CVE-2019-13233,
      CVE-2019-13272, CVE-2019-2024, CVE-2019-2101, CVE-2019-3846
    
    Package Information:
      https://launchpad.net/ubuntu/+source/linux/4.15.0-58.64
      https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1040.42
      https://launchpad.net/ubuntu/+source/linux-gke-4.15/4.15.0-1040.42
      https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1042.42
      https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1050.57
      https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1021.23
      https://launchpad.net/ubuntu/+source/linux-raspi2/4.15.0-1043.46
      https://launchpad.net/ubuntu/+source/linux-snapdragon/4.15.0-1060.66
      https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1055.60
      https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1040.42~16.04.1
      https://launchpad.net/ubuntu/+source/linux-hwe/4.15.0-58.64~16.04.1
      https://launchpad.net/ubuntu/+source/linux-oracle/4.15.0-1021.23~16.04.1
    
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