Samba 4.10.0 < 4.10.5 DoS Vulnerability (CVE-2019-12436)

# Copyright (C) 2019 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("1.3.6.1.4.1.25623.1.0.142521");
  script_version("2021-09-06T11:01:35+0000");
  script_tag(name:"last_modification", value:"2021-09-06 11:01:35 +0000 (Mon, 06 Sep 2021)");
  script_tag(name:"creation_date", value:"2019-06-28 07:57:39 +0000 (Fri, 28 Jun 2019)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-06-19 15:15:00 +0000 (Wed, 19 Jun 2019)");

  script_cve_id("CVE-2019-12435");

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

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

  script_name("Samba 4.10.0 < 4.10.5 DoS Vulnerability (CVE-2019-12436)");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("Denial of Service");
  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 a denial of service vulnerability.");

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

  script_tag(name:"insight", value:"A user with read access to the LDAP server can crash the LDAP server process.
  Depending on the Samba version and the choice of process model, this may crash only the user's own connection.

  Specifically, while in Samba 4.10 the default is for one process per connected client, site-specific
  configuration triggers can change this.");

  script_tag(name:"affected", value:"Samba versions 4.10.x.");

  script_tag(name:"solution", value:"Update to version 4.10.5 or later.");

  script_xref(name:"URL", value:"https://www.samba.org/samba/security/CVE-2019-12436.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'];
path = infos['location'];

if (version_in_range(version: version, test_version: "4.10.0", test_version2: "4.10.4")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "4.10.5", install_path: path);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);