Open-Xchange (OX) App Suite XML External Entity Information Disclosure Vulnerability

# Copyright (C) 2017 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:open-xchange:open-xchange_appsuite";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.809852");
  script_version("2022-12-12T10:22:32+0000");
  script_cve_id("CVE-2016-4047");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2022-12-12 10:22:32 +0000 (Mon, 12 Dec 2022)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2018-10-19 15:46:00 +0000 (Fri, 19 Oct 2018)");
  script_tag(name:"creation_date", value:"2017-01-02 15:29:28 +0530 (Mon, 02 Jan 2017)");
  script_tag(name:"qod_type", value:"remote_banner");
  script_name("Open-Xchange (OX) App Suite XML External Entity Information Disclosure Vulnerability");

  script_tag(name:"summary", value:"Open-Xchange (OX) App Suite is prone to an information disclosure vulnerability.");

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

  script_tag(name:"insight", value:"The flaw exists due to error in which
  references to external Open XML document type definitions (.dtd resources)
  can be placed within .docx and .xslx files. Those resources were requested
  when parsing certain parts of the generated document.");

  script_tag(name:"impact", value:"Successful exploitation will allow attackers
  to gain access to sensitive information, this may lead to further attacks.");

  script_tag(name:"affected", value:"Open-Xchange (OX) App Suite versions
  7.6.2-rev0 - 7.6.2-rev13,
  7.6.3-rev0 - 7.6.3-rev2,
  7.8.0-rev0 - 7.8.0-rev6,
  7.8.1-rev0 - 7.8.1-rev7.");

  script_tag(name:"solution", value:"Update to version 7.8.1-rev8, or 7.6.2-rev14, or 7.6.3-rev3, or 7.8.0-rev7 or later.");

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

  script_xref(name:"URL", value:"http://www.securitytracker.com/id/1036157");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/91355");
  script_xref(name:"URL", value:"http://www.securityfocus.com/archive/1/archive/1/538732/100/0/threaded");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
  script_family("Web application abuses");
  script_dependencies("gb_open-xchange_ox_app_suite_http_detect.nasl");
  script_mandatory_keys("open-xchange/app_suite/detected");

  exit(0);
}

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

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

if (!revision = get_kb_item("open-xchange/app_suite/" + port + "/revision"))
  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"];
version += "." + revision;

if(version =~ "^7\.8\.1" && version_is_less(version: version, test_version: "7.8.1.8"))
  fix = "7.8.1-rev8";

else if(version =~ "^7\.6\.2" && version_is_less(version: version, test_version: "7.6.2.14"))
  fix = "7.6.2-rev14";

else if(version =~ "^7\.6\.3" && version_is_less(version: version, test_version: "7.6.3.3"))
  fix = "7.6.3-rev3";

else if(version =~ "^7\.8\.0" && version_is_less(version: version, test_version: "7.8.0.7"))
  fix = "7.8.0-rev7";

if (fix) {
  report = report_fixed_ver(installed_version: version, fixed_version: fix, install_path: location);
  security_message(port: port, data: report);
  exit(0);
}

exit(99);