PHPMailer < 5.2.20 RCE Vulnerability

# SPDX-FileCopyrightText: 2016 Greenbone AG
# 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-only

CPE = "cpe:/a:phpmailer_project:phpmailer";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.809843");
  script_version("2024-06-28T05:05:33+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:"2024-06-28 05:05:33 +0000 (Fri, 28 Jun 2024)");
  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 RCE Vulnerability");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  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 );