TeamViewer 'Chat functionality' Information Disclosure Vulnerability - Windows

# 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:teamviewer:teamviewer";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.815860");
  script_version("2021-10-04T14:22:38+0000");
  script_tag(name:"last_modification", value:"2021-10-04 14:22:38 +0000 (Mon, 04 Oct 2021)");
  script_tag(name:"creation_date", value:"2019-12-06 12:34:34 +0530 (Fri, 06 Dec 2019)");
  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:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2019-12-16 19:30:00 +0000 (Mon, 16 Dec 2019)");
  script_cve_id("CVE-2019-19362");
  script_tag(name:"qod_type", value:"registry");
  script_tag(name:"solution_type", value:"VendorFix");
  script_name("TeamViewer 'Chat functionality' Information Disclosure Vulnerability - Windows");
  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  script_family("General");
  script_dependencies("gb_teamviewer_win_detect.nasl");
  script_mandatory_keys("teamviewer/Ver");

  script_tag(name:"summary", value:"TeamViewer 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 is due to while using Chat functionality,
  it was observed that upon login to Teamviewer desktop application for Windows,
  it saved every communication within Windows main memory. However, while user
  logs out from account or deletes conversation history, under any such case the
  data would not be wiped from main memory.");

  script_tag(name:"impact", value:"Successful exploitation allows attackers to
  access sensitive information.");

  script_tag(name:"affected", value:"TeamViewer version 14.3.4730.");

  script_tag(name:"solution", value:"Update to latest version available from vendor.
  Please see the references for more information.");

  script_xref(name:"URL", value:"http://nestedif.com/teamviewer-vulnerability-improper-session-handling-leading-to-information-disclosure-advisory/");
  exit(0);
}

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

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

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

if(version == "14.3.4730") {
  report = report_fixed_ver(installed_version: version, fixed_version: "Update to latest version", install_path: location);
  security_message(port: 0, data: report);
  exit(0);
}

exit(99);