Samba Privilege Escalation Vulnerability (CVE-2014-8143)

# Copyright (C) 2021 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("1.3.6.1.4.1.25623.1.0.117771");
  script_version("2021-11-11T07:09:29+0000");
  script_tag(name:"last_modification", value:"2021-11-11 07:09:29 +0000 (Thu, 11 Nov 2021)");
  script_tag(name:"creation_date", value:"2021-11-11 06:48:14 +0000 (Thu, 11 Nov 2021)");
  script_tag(name:"cvss_base", value:"8.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:C/I:C/A:C");

  script_cve_id("CVE-2014-8143");

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

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

  script_name("Samba Privilege Escalation Vulnerability (CVE-2014-8143)");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2021 Greenbone Networks GmbH");
  script_family("Privilege escalation");
  script_dependencies("smb_nativelanman.nasl", "gb_samba_detect.nasl");
  script_mandatory_keys("samba/smb_or_ssh/detected");

  script_tag(name:"summary", value:"In Samba's AD DC we neglected to ensure that attempted
  modifications of the userAccountControl attribute did not allow the UF_SERVER_TRUST_ACCOUNT bit to
  be set.");

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

  script_tag(name:"insight", value:"Samba's AD DC allows the administrator to delegate creation of
  user or computer accounts to specific users or groups.

  However, all released versions of Samba's AD DC did not implement the additional required check on
  the UF_SERVER_TRUST_ACCOUNT bit in the userAccountControl attributes.");

  script_tag(name:"affected", value:"Samba versions 4.0.0 through 4.0.23 and 4.1.x through 4.1.15.");

  script_tag(name:"solution", value:"Update to version 4.0.24, 4.1.16 or later.");

  script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2014-8143.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(version: version, test_version: "4.0.0", test_version2: "4.0.23")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.0.24", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "4.1.0", test_version2: "4.1.15")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.1.16", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);