Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-4208-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4208-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include('compat.inc');

if (description)
{
  script_id(131562);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2019-15794",
    "CVE-2019-17075",
    "CVE-2019-17133",
    "CVE-2019-18810",
    "CVE-2019-19048",
    "CVE-2019-19060",
    "CVE-2019-19061",
    "CVE-2019-19065",
    "CVE-2019-19067",
    "CVE-2019-19069",
    "CVE-2019-19075",
    "CVE-2019-19083"
  );
  script_xref(name:"USN", value:"4208-1");

  script_name(english:"Ubuntu 18.04 LTS : Linux kernel vulnerabilities (USN-4208-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in
the USN-4208-1 advisory.

    Jann Horn discovered that the OverlayFS and ShiftFS Drivers in the Linux kernel did not properly handle
    reference counting during memory mapping operations when used in conjunction with AUFS. A local attacker
    could use this to cause a denial of service (system crash) or possibly execute arbitrary code.
    (CVE-2019-15794)

    Nicolas Waisman discovered that the WiFi driver stack in the Linux kernel did not properly validate SSID
    lengths. A physically proximate attacker could use this to cause a denial of service (system crash).
    (CVE-2019-17133)

    It was discovered that the ARM Komeda display 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-2019-18810)

    It was discovered that the VirtualBox guest driver implementation 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 (memory exhaustion). (CVE-2019-19048)

    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-2019-19060, CVE-2019-19061)

    It was discovered that the Intel OPA Gen1 Infiniband 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-2019-19065)

    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 in the Qualcomm FastRPC 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-2019-19069)

    It was discovered that the Cascoda CA8210 SPI 802.15.4 wireless controller 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-2019-19075)

    It was discovered that the AMD Display Engine Driver in the Linux kernel did not properly deallocate
    memory in certain error conditions. A local attack could use this to cause a denial of service (memory
    exhaustion). (CVE-2019-19083)

    Nicolas Waisman discovered that the Chelsio T4/T5 RDMA Driver for the Linux kernel performed DMA from a
    kernel stack. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2019-17075)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-4208-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-17133");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/10/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/12/02");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-5.3.0-1009-gcp");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2019-2024 Canonical, Inc. / NASL script (C) 2019-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "linux_alt_patch_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');
include('ksplice.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var kernel_mappings = {
  '18.04': {
    '5.3.0': {
      'gcp': '5.3.0-1009'
    }
  }
};

var host_kernel_release = get_kb_item('Host/uptrack-uname-r');
if (empty_or_null(host_kernel_release)) host_kernel_release = get_kb_item_or_exit('Host/uname-r');
var host_kernel_base_version = get_kb_item_or_exit('Host/Debian/kernel-base-version');
var host_kernel_type = get_kb_item_or_exit('Host/Debian/kernel-type');
if(empty_or_null(kernel_mappings[os_release][host_kernel_base_version][host_kernel_type])) audit(AUDIT_INST_VER_NOT_VULN, 'kernel ' + host_kernel_release);

var extra = '';
var kernel_fixed_version = kernel_mappings[os_release][host_kernel_base_version][host_kernel_type] + "-" + host_kernel_type;
if (deb_ver_cmp(ver1:host_kernel_release, ver2:kernel_fixed_version) < 0)
{
  extra += 'Running Kernel level of ' + host_kernel_release + ' does not meet the minimum fixed level of ' + kernel_fixed_version + ' for this advisory.\n\n';
}
  else
{
  audit(AUDIT_PATCH_INSTALLED, 'Kernel package for USN-4208-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2019-15794', 'CVE-2019-17075', 'CVE-2019-17133', 'CVE-2019-18810', 'CVE-2019-19048', 'CVE-2019-19060', 'CVE-2019-19061', 'CVE-2019-19065', 'CVE-2019-19067', 'CVE-2019-19069', 'CVE-2019-19075', 'CVE-2019-19083');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-4208-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}