Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4227-1)

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4227-1. 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(132691);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/09");

  script_cve_id(
    "CVE-2019-14895",
    "CVE-2019-14896",
    "CVE-2019-14897",
    "CVE-2019-14901",
    "CVE-2019-16231",
    "CVE-2019-16233",
    "CVE-2019-18660",
    "CVE-2019-19045",
    "CVE-2019-19052",
    "CVE-2019-19083",
    "CVE-2019-19524",
    "CVE-2019-19529",
    "CVE-2019-19534",
    "CVE-2019-19807"
  );
  script_xref(name:"USN", value:"4227-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS : Linux kernel vulnerabilities (USN-4227-1)");

  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 16.04 LTS / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-4227-1 advisory.

  - A heap-based buffer overflow was discovered in the Linux kernel, all versions 3.x.x and 4.x.x before
    4.18.0, in Marvell WiFi chip driver. The flaw could occur when the station attempts a connection
    negotiation during the handling of the remote devices country settings. This could allow the remote device
    to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2019-14895)

  - A heap-based buffer overflow vulnerability was found in the Linux kernel, version kernel-2.6.32, in
    Marvell WiFi chip driver. A remote attacker could cause a denial of service (system crash) or, possibly
    execute arbitrary code, when the lbs_ibss_join_existing function is called after a STA connects to an AP.
    (CVE-2019-14896)

  - A stack-based buffer overflow was found in the Linux kernel, version kernel-2.6.32, in Marvell WiFi chip
    driver. An attacker is able to cause a denial of service (system crash) or, possibly execute arbitrary
    code, when a STA works in IBSS mode (allows connecting stations together without the use of an AP) and
    connects to another STA. (CVE-2019-14897)

  - A heap overflow flaw was found in the Linux kernel, all versions 3.x.x and 4.x.x before 4.18.0, in Marvell
    WiFi chip driver. The vulnerability allows a remote attacker to cause a system crash, resulting in a
    denial of service, or execute arbitrary code. The highest threat with this vulnerability is with the
    availability of the system. If code execution occurs, the code will run with the permissions of root. This
    will affect both confidentiality and integrity of files on the system. (CVE-2019-14901)

  - drivers/net/fjes/fjes_main.c in the Linux kernel 5.2.14 does not check the alloc_workqueue return value,
    leading to a NULL pointer dereference. (CVE-2019-16231)

  - drivers/scsi/qla2xxx/qla_os.c in the Linux kernel 5.2.14 does not check the alloc_workqueue return value,
    leading to a NULL pointer dereference. (CVE-2019-16233)

  - The Linux kernel before 5.4.1 on powerpc allows Information Exposure because the Spectre-RSB mitigation is
    not in place for all applicable CPUs, aka CID-39e72bf96f58. This is related to
    arch/powerpc/kernel/entry_64.S and arch/powerpc/kernel/security.c. (CVE-2019-18660)

  - A memory leak in the mlx5_fpga_conn_create_cq() function in
    drivers/net/ethernet/mellanox/mlx5/core/fpga/conn.c in the Linux kernel before 5.3.11 allows attackers to
    cause a denial of service (memory consumption) by triggering mlx5_vector2eqn() failures, aka
    CID-c8c2a057fdc7. (CVE-2019-19045)

  - A memory leak in the gs_can_open() function in drivers/net/can/usb/gs_usb.c in the Linux kernel before
    5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering usb_submit_urb()
    failures, aka CID-fb5be6a7b486. (CVE-2019-19052)

  - Memory leaks in *clock_source_create() functions under drivers/gpu/drm/amd/display/dc in the Linux kernel
    before 5.3.8 allow attackers to cause a denial of service (memory consumption). This affects the
    dce112_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c, the
    dce100_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c, the
    dcn10_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c, the
    dcn20_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c, the
    dce120_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c, the
    dce110_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c, and the
    dce80_clock_source_create() function in drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c, aka
    CID-055e547478a1. (CVE-2019-19083)

  - In the Linux kernel before 5.3.12, there is a use-after-free bug that can be caused by a malicious USB
    device in the drivers/input/ff-memless.c driver, aka CID-fa3a5a1880c9. (CVE-2019-19524)

  - In the Linux kernel before 5.3.11, there is a use-after-free bug that can be caused by a malicious USB
    device in the drivers/net/can/usb/mcba_usb.c driver, aka CID-4d6636498c41. (CVE-2019-19529)

  - In the Linux kernel before 5.3.11, there is an info-leak bug that can be caused by a malicious USB device
    in the drivers/net/can/usb/peak_usb/pcan_usb_core.c driver, aka CID-f7a1337f0d29. (CVE-2019-19534)

  - In the Linux kernel before 5.3.11, sound/core/timer.c has a use-after-free caused by erroneous code
    refactoring, aka CID-e7af6307a8a5. This is related to snd_timer_open and snd_timer_close_locked. The
    timeri variable was originally intended to be for a newly created timer instance, but was used for a
    different purpose after refactoring. (CVE-2019-19807)

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-4227-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  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-2019-14901");

  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:"2019/09/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2020/01/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/01/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1031-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1050-gke");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1052-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1052-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1053-raspi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1057-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1066-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1066-oem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1070-snapdragon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-74-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-74-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-74-lowlatency");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  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) 2020-2024 Canonical, Inc. / NASL script (C) 2020-2024 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 (! ('16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 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 = {
  '16.04': {
    '4.15.0': {
      'generic': '4.15.0-74',
      'generic-lpae': '4.15.0-74',
      'lowlatency': '4.15.0-74',
      'oracle': '4.15.0-1031',
      'gcp': '4.15.0-1052',
      'aws': '4.15.0-1057',
      'azure': '4.15.0-1066'
    }
  },
  '18.04': {
    '4.15.0': {
      'generic': '4.15.0-74',
      'generic-lpae': '4.15.0-74',
      'lowlatency': '4.15.0-74',
      'oracle': '4.15.0-1031',
      'gke': '4.15.0-1050',
      'kvm': '4.15.0-1052',
      'raspi2': '4.15.0-1053',
      'aws': '4.15.0-1057',
      'oem': '4.15.0-1066',
      'snapdragon': '4.15.0-1070'
    }
  }
};

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 = 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-4227-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2019-14895', 'CVE-2019-14896', 'CVE-2019-14897', 'CVE-2019-14901', 'CVE-2019-16231', 'CVE-2019-16233', 'CVE-2019-18660', 'CVE-2019-19045', 'CVE-2019-19052', 'CVE-2019-19083', 'CVE-2019-19524', 'CVE-2019-19529', 'CVE-2019-19534', 'CVE-2019-19807');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-4227-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}