Ubuntu 16.04 ESM / 18.04 LTS : Linux kernel vulnerabilities (USN-5515-1)

##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5515-1. 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(163111);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/27");

  script_cve_id(
    "CVE-2021-4197",
    "CVE-2022-1011",
    "CVE-2022-1198",
    "CVE-2022-1199",
    "CVE-2022-1204",
    "CVE-2022-1205",
    "CVE-2022-1353",
    "CVE-2022-1516",
    "CVE-2022-2380",
    "CVE-2022-28389"
  );
  script_xref(name:"USN", value:"5515-1");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 LTS : Linux kernel vulnerabilities (USN-5515-1)");

  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 ESM / 18.04 LTS host has a package installed that is affected by multiple vulnerabilities as
referenced in the USN-5515-1 advisory.

    Eric Biederman discovered that the cgroup process migration implementation in the Linux kernel did not
    perform permission checks correctly in some situations. A local attacker could possibly use this to gain
    administrative privileges. (CVE-2021-4197)

    Jann Horn discovered that the FUSE file system in the Linux kernel contained 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-2022-1011)

    Duoming Zhou discovered that the 6pack protocol implementation in the Linux kernel did not handle detach
    events properly in some situations, leading to a use-after-free vulnerability. A local attacker could use
    this to cause a denial of service (system crash). (CVE-2022-1198)

    Duoming Zhou discovered that the AX.25 amateur radio protocol implementation in the Linux kernel did not
    handle detach events properly in some situations. A local attacker could possibly use this to cause a
    denial of service (system crash) or execute arbitrary code. (CVE-2022-1199)

    Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol implementation in the Linux
    kernel during device detach operations. A local attacker could possibly use this to cause a denial of
    service (system crash). (CVE-2022-1204)

    Duoming Zhou discovered race conditions in the AX.25 amateur radio protocol implementation in the Linux
    kernel, leading to use-after-free vulnerabilities. A local attacker could possibly use this to cause a
    denial of service (system crash). (CVE-2022-1205)

    It was discovered that the PF_KEYv2 implementation in the Linux kernel did not properly initialize kernel
    memory in some situations. A local attacker could use this to expose sensitive information (kernel
    memory). (CVE-2022-1353)

    It was discovered that the implementation of X.25 network protocols in the Linux kernel did not terminate
    link layer sessions properly. A local attacker could possibly use this to cause a denial of service
    (system crash). (CVE-2022-1516)

    Zheyu Ma discovered that the Silicon Motion SM712 framebuffer driver in the Linux kernel did not properly
    handle very small reads. A local attacker could use this to cause a denial of service (system crash).
    (CVE-2022-2380)

    It was discovered that the Microchip CAN BUS Analyzer interface implementation in the Linux kernel did not
    properly handle certain error conditions, leading to a double-free. A local attacker could possibly use
    this to cause a denial of service (system crash). (CVE-2022-28389)

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-5515-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected kernel package.");
  script_set_cvss_base_vector("CVSS2#AV:L/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: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-2021-4197");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-1011");

  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:"2022/03/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/07/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/07/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1049-dell300x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1102-oracle");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1115-raspi2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1123-kvm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1131-gcp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1133-snapdragon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1137-aws");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1137-aws-hwe");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-1146-azure");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-189-generic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-189-generic-lpae");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:linux-image-4.15.0-189-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) 2022-2024 Canonical, Inc. / NASL script (C) 2022-2024 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 (! ('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 ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var kernel_mappings = {
  '16.04': {
    '4.15.0': {
      'generic': '4.15.0-189',
      'lowlatency': '4.15.0-189',
      'oracle': '4.15.0-1102',
      'gcp': '4.15.0-1131',
      'aws': '4.15.0-1137',
      'aws-hwe': '4.15.0-1137'
    }
  },
  '18.04': {
    '4.15.0': {
      'generic': '4.15.0-189',
      'generic-lpae': '4.15.0-189',
      'lowlatency': '4.15.0-189',
      'dell300x': '4.15.0-1049',
      'oracle': '4.15.0-1102',
      'raspi2': '4.15.0-1115',
      'kvm': '4.15.0-1123',
      'gcp': '4.15.0-1131',
      'snapdragon': '4.15.0-1133',
      'aws': '4.15.0-1137',
      'azure': '4.15.0-1146'
    }
  }
};

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-5515-1');
}

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var cve_list = make_list('CVE-2021-4197', 'CVE-2022-1011', 'CVE-2022-1198', 'CVE-2022-1199', 'CVE-2022-1204', 'CVE-2022-1205', 'CVE-2022-1353', 'CVE-2022-1516', 'CVE-2022-2380', 'CVE-2022-28389');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, 'KSplice hotfix for USN-5515-1');
  }
  else
  {
    extra = extra + ksplice_reporting_text();
  }
}
if (extra) {
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}