Ubuntu 14.04 LTS / 16.04 LTS : Linux kernel vulnerabilities (USN-6739-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6739-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(193594);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2019-25162",
    "CVE-2021-46936",
    "CVE-2021-46955",
    "CVE-2021-46966",
    "CVE-2021-46990",
    "CVE-2022-20422",
    "CVE-2023-1382",
    "CVE-2023-1998",
    "CVE-2023-24023",
    "CVE-2023-51043",
    "CVE-2023-51779",
    "CVE-2023-52429",
    "CVE-2023-52445",
    "CVE-2023-52451",
    "CVE-2023-52600",
    "CVE-2023-52603",
    "CVE-2024-23851"
  );
  script_xref(name:"USN", value:"6739-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS : Linux kernel vulnerabilities (USN-6739-1)");

  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 14.04 LTS / 16.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-6739-1 advisory.

    It was discovered that a race condition existed in the instruction emulator of the Linux kernel on Arm
    64-bit systems. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2022-20422)

    Wei Chen discovered that a race condition existed in the TIPC protocol implementation in the Linux kernel,
    leading to a null pointer dereference vulnerability. A local attacker could use this to cause a denial of
    service (system crash). (CVE-2023-1382)

    Jose Oliveira and Rodrigo Branco discovered that the Spectre Variant 2 mitigations with prctl syscall were
    insufficient in some situations. A local attacker could possibly use this to expose sensitive information.
    (CVE-2023-1998)

    Daniele Antonioli discovered that the Secure Simple Pairing and Secure Connections pairing in the
    Bluetooth protocol could allow an unauthenticated user to complete authentication without pairing
    credentials. A physically proximate attacker placed between two Bluetooth devices could use this to
    subsequently impersonate one of the paired devices. (CVE-2023-24023)

    shanzhulig discovered that the DRM subsystem in the Linux kernel contained a race condition when
    performing certain operation while handling driver unload, leading to a use-after-free vulnerability. A
    local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary
    code. (CVE-2023-51043)

    It was discovered that a race condition existed in the Bluetooth subsystem of the Linux kernel, leading to
    a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system
    crash) or possibly execute arbitrary code. (CVE-2023-51779)

    It was discovered that the device mapper driver in the Linux kernel did not properly validate target size
    during certain memory allocations. A local attacker could use this to cause a denial of service (system
    crash). (CVE-2023-52429, CVE-2024-23851)

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to
    compromise the system. This update corrects flaws in the following subsystems:

    - Architecture specifics;

    - ACPI drivers;

    - I2C subsystem;

    - Media drivers;

    - JFS file system;

    - IPv4 Networking;

    - Open vSwitch; (CVE-2021-46966, CVE-2021-46936, CVE-2023-52451, CVE-2019-25162, CVE-2023-52445,
    CVE-2023-52600, CVE-2021-46990, CVE-2021-46955, CVE-2023-52603)

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-6739-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:S/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:L/AC:L/PR:L/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-2023-52451");

  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:"2022/10/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/04/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/04/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1130-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1131-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-1168-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-253-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.4.0-253-lowlatency");
  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) 2024 Canonical, Inc. / NASL script (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.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 (! ('14.04' >< os_release || '16.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04', '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 ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var kernel_mappings = {
  '14.04': {
    '4.4.0': {
      'generic': '4.4.0-253',
      'lowlatency': '4.4.0-253',
      'aws': '4.4.0-1130'
    }
  },
  '16.04': {
    '4.4.0': {
      'generic': '4.4.0-253',
      'lowlatency': '4.4.0-253',
      'kvm': '4.4.0-1131',
      'aws': '4.4.0-1168'
    }
  }
};

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 (!ubuntu_pro_detected) {
  extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
  extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
  extra += 'require an Ubuntu Pro subscription.\n\n';
}
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-6739-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2019-25162', 'CVE-2021-46936', 'CVE-2021-46955', 'CVE-2021-46966', 'CVE-2021-46990', 'CVE-2022-20422', 'CVE-2023-1382', 'CVE-2023-1998', 'CVE-2023-24023', 'CVE-2023-51043', 'CVE-2023-51779', 'CVE-2023-52429', 'CVE-2023-52445', 'CVE-2023-52451', 'CVE-2023-52600', 'CVE-2023-52603', 'CVE-2024-23851');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-6739-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}