OTRS 5.0.x < 5.0.39, 6.0.x < 6.0.24, 7.0.x < 7.0.13 DoS Vulnerability

# 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:otrs:otrs";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.143236");
  script_version("2021-09-02T14:01:33+0000");
  script_tag(name:"last_modification", value:"2021-09-02 14:01:33 +0000 (Thu, 02 Sep 2021)");
  script_tag(name:"creation_date", value:"2019-12-09 05:31:00 +0000 (Mon, 09 Dec 2019)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-09-23 15:15:00 +0000 (Wed, 23 Sep 2020)");

  script_cve_id("CVE-2019-18180");

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

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

  script_name("OTRS 5.0.x < 5.0.39, 6.0.x < 6.0.24, 7.0.x < 7.0.13 DoS Vulnerability");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("Denial of Service");
  script_dependencies("secpod_otrs_detect.nasl");
  script_mandatory_keys("OTRS/installed");

  script_tag(name:"summary", value:"OTRS 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:"OTRS can be put into an endless loop by providing filenames with overly long
  extensions. This applies to the PostMaster (sending in email) and also upload (attaching files to mails, for
  example).");

  script_tag(name:"affected", value:"OTRS 5.0.x through 5.0.38, 6.0.x through 6.0.23 and 7.0.x through 7.0.12.");

  script_tag(name:"solution", value:"Update to version 5.0.39, 6.0.24, 7.0.13 or later.");

  script_xref(name:"URL", value:"https://community.otrs.com/security-advisory-2019-15-security-update-for-otrs-framework/");

  exit(0);
}

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

if (!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: "5.0.0", test_version2: "5.0.38")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "5.0.39", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "6.0.0", test_version2: "6.0.23")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "6.0.24", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

if (version_in_range(version: version, test_version: "7.0.0", test_version2: "7.0.12")) {
  report = report_fixed_ver(installed_version: version, fixed_version: "7.0.13", install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);