PHPMailer < 5.2.22 Local 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:phpmailer_project:phpmailer";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108051");
  script_version("2022-04-13T11:57:07+0000");
  script_cve_id("CVE-2017-5223");
  script_tag(name:"cvss_base", value:"2.1");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2022-04-13 11:57:07 +0000 (Wed, 13 Apr 2022)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:L/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:"2017-10-28 01:29:00 +0000 (Sat, 28 Oct 2017)");
  script_tag(name:"creation_date", value:"2017-01-25 11:00:00 +0100 (Wed, 25 Jan 2017)");
  script_name("PHPMailer < 5.2.22 Local Information Disclosure Vulnerability");
  script_copyright("Copyright (C) 2017 Greenbone Networks GmbH");
  script_category(ACT_GATHER_INFO);
  script_family("Web application abuses");
  script_dependencies("gb_phpmailer_detect.nasl");
  script_mandatory_keys("phpmailer/detected");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/95328");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/95130");
  script_xref(name:"URL", value:"https://github.com/PHPMailer/PHPMailer/blob/master/SECURITY.md");

  script_tag(name:"summary", value:"PHPMailer is prone to a local 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 because PHPMailer's msgHTML method applies
  transformations to an HTML document to make it usable as an email message body. One of the
  transformations is to convert relative image URLs into attachments using a script-provided
  base directory. If no base directory is provided, it resolves to /, meaning that relative
  image URLs get treated as absolute local file paths and added as attachments. To form a
  remote vulnerability, the msgHTML method must be called, passed an unfiltered, user-supplied
  HTML document, and must not set a base directory.");

  script_tag(name:"impact", value:"Attackers can exploit this issue to obtain sensitive information
  that may aid in launching further attacks.");

  script_tag(name:"affected", value:"PHPMailer versions 5.0.0 through 5.2.20 are vulnerable.");

  script_tag(name:"solution", value:"Upgrade to PHPMailer 5.2.22 or later.");

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

  exit(0);
}

include("version_func.inc");
include("host_details.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:"5.2.20" ) ) {
  report = report_fixed_ver( installed_version:version, fixed_version:"5.2.22", install_url:location );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );