Samba Impersonation Vulnerability (CVE-2022-0336)

# Copyright (C) 2022 Greenbone Networks GmbH
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

CPE = "cpe:/a:samba:samba";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.147556");
  script_version("2023-10-19T05:05:21+0000");
  script_tag(name:"last_modification", value:"2023-10-19 05:05:21 +0000 (Thu, 19 Oct 2023)");
  script_tag(name:"creation_date", value:"2022-02-01 05:27:15 +0000 (Tue, 01 Feb 2022)");
  script_tag(name:"cvss_base", value:"9.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2022-09-01 20:05:00 +0000 (Thu, 01 Sep 2022)");

  script_cve_id("CVE-2022-0336");

  script_tag(name:"qod_type", value:"remote_banner_unreliable");

  script_tag(name:"solution_type", value:"VendorFix");

  script_name("Samba Impersonation Vulnerability (CVE-2022-0336)");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2022 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("smb_nativelanman.nasl", "gb_samba_detect.nasl");
  script_mandatory_keys("samba/smb_or_ssh/detected");

  script_tag(name:"summary", value:"Samba is prone to an impersonation vulnerability.");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"insight", value:"The Samba AD DC includes checks when adding service principals
  names (SPNs) to an account to ensure that SPNs do not alias with those already in the database.
  Some of these checks are able to be bypassed if an account modification re-adds an SPN that was
  previously present on that account, such as one added when a computer is joined to a domain.");

  script_tag(name:"impact", value:"An attacker who has the ability to write to an account can
  exploit this to perform a denial of service (DoS) attack by adding an SPN that matches an
  existing service. Additionally, an attacker who can intercept traffic can impersonate existing
  services, resulting in a loss of confidentiality and integrity.");

  script_tag(name:"affected", value:"Samba version 4.0.0 through 4.13.16, 4.14.x through 4.14.11
  and 4.15.x through 4.15.4.");

  script_tag(name:"solution", value:"Update to version 4.13.17, 4.14.12, 4.15.5 or later.");

  script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2022-0336.html");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (isnull(port = get_app_port(cpe: CPE)))
  exit(0);

if (!infos = get_app_version_and_location(cpe: CPE, port: port, exit_no_version: TRUE))
  exit(0);

version = infos["version"];
location = infos["location"];

if (version_in_range_exclusive(version: version, test_version_lo: "4.0.0", test_version_up: "4.13.17")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.13.17", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "4.14.0", test_version_up: "4.14.12")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.14.12", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range_exclusive(version: version, test_version_lo: "4.15.0", test_version_up: "4.15.5")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.15.5", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);