PHPMailer < 5.2.20 Remote Code Execution Vulnerability

# Copyright (C) 2016 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("1.3.6.1.4.1.25623.1.0.809843");
  script_version("2022-04-13T13:17:10+0000");
  script_cve_id("CVE-2016-10045");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2022-04-13 13:17:10 +0000 (Wed, 13 Apr 2022)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2021-09-30 16:30:00 +0000 (Thu, 30 Sep 2021)");
  script_tag(name:"creation_date", value:"2016-12-29 11:17:41 +0530 (Thu, 29 Dec 2016)");
  script_name("PHPMailer < 5.2.20 Remote Code Execution Vulnerability");
  script_copyright("Copyright (C) 2016 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:"https://www.exploit-db.com/exploits/40969");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/95130");
  script_xref(name:"URL", value:"http://seclists.org/fulldisclosure/2016/Dec/81");
  script_xref(name:"URL", value:"https://legalhackers.com/advisories/PHPMailer-Exploit-Remote-Code-Exec-CVE-2016-10045-Vuln-Patch-Bypass.html");
  script_xref(name:"URL", value:"https://github.com/PHPMailer/PHPMailer/blob/master/SECURITY.md");

  script_tag(name:"summary", value:"PHPMailer is prone to a remote code execution (RCE) 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 incomplete fix for
  CVE-2016-10033 as, PHPMailer uses the Sender variable to build the params
  string. The validation is done using the  RFC 3696 specification, which can
  allow emails to contain spaces when it has double quote.");

  script_tag(name:"impact", value:"Successfully exploiting this issue allows an
  remote attacker to execute arbitrary code in the context of the web server and
  compromise the target web application.");

  script_tag(name:"affected", value:"PHPMailer versions prior to 5.2.20");

  script_tag(name:"solution", value:"Upgrade to PHPMailer 5.2.20 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:"5.2.20" ) ) {
  report = report_fixed_ver( installed_version:version, fixed_version:"5.2.20", install_url:location );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );