PHPMailer < 5.2.14 SMTP CRLF Injection Vulnerability

# Copyright (C) 2018 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("1.3.6.1.4.1.25623.1.0.108467");
  script_version("2022-04-13T07:21:45+0000");
  script_cve_id("CVE-2015-8476");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_tag(name:"last_modification", value:"2022-04-13 07:21:45 +0000 (Wed, 13 Apr 2022)");
  script_tag(name:"creation_date", value:"2018-09-25 09:59:32 +0200 (Tue, 25 Sep 2018)");
  script_name("PHPMailer < 5.2.14 SMTP CRLF Injection Vulnerability");
  script_copyright("Copyright (C) 2018 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/78619");
  script_xref(name:"URL", value:"https://github.com/PHPMailer/PHPMailer/blob/master/SECURITY.md");

  script_tag(name:"summary", value:"PHPMailer is prone to a SMTP CRLF injection 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 allows to inject arbitrary SMTP
  commands via CRLF sequences in an (1) email address to the validateAddress function in class.phpmailer.php
  or (2) SMTP command to the sendCommand function in class.smtp.php.");

  script_tag(name:"impact", value:"Attackers can exploit this issue to send arbitrary messages.");

  script_tag(name:"affected", value:"PHPMailer versions before 5.2.14 are vulnerable.");

  script_tag(name:"solution", value:"Update to version 5.2.14 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_is_less( version:version, test_version:"5.2.14" ) ) {
  report = report_fixed_ver( installed_version:version, fixed_version:"5.2.14", install_url:location );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );