PayPal PHP Merchant SDK Detection

# SPDX-FileCopyrightText: 2017 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.108086");
  script_version("2023-12-13T05:05:23+0000");
  script_tag(name:"cvss_base", value:"0.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:N");
  script_tag(name:"last_modification", value:"2023-12-13 05:05:23 +0000 (Wed, 13 Dec 2023)");
  script_tag(name:"creation_date", value:"2017-02-28 07:21:29 +0100 (Tue, 28 Feb 2017)");
  script_name("PayPal PHP Merchant SDK Detection");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_family("Product detection");
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "gb_php_http_detect.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"summary", value:"This script detects the installed version of the
  PayPal PHP Merchant SDK.");

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

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
include("list_array_func.inc");
include("cpe.inc");
include("host_details.inc");

port = http_get_port( default:80 );
if( ! http_can_host_php( port:port ) ) exit( 0 );

foreach dir( make_list_unique( "/merchant-sdk-php" , "/paypal", http_cgi_dirs( port:port ) ) ) {

  if( dir == "/" ) dir = "";

  install = dir;
  if( dir == "/" ) dir = "";

  res = http_get_cache( item:dir + "/composer.json", port:port );

  if( res =~ "^HTTP/1\.[01] 200" && ( '"name": "paypal/merchant-sdk-php",' >< res ||
      '"description": "PayPal Merchant SDK for PHP",' >< res ) ) {

    version = "unknown";

    url = dir + "/CHANGELOG.md";
    req = http_get( item:url, port:port );
    res = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );

    vers = eregmatch( pattern:"####Version ([0-9.]+)", string:res );
    if( res =~ "^HTTP/1\.[01] 200" && ! isnull( vers[1] ) ) {
      version = vers[1];
      conclUrl = http_report_vuln_url( port:port, url:url, url_only:TRUE );
    } else {

      # older versions like 2.2.98
      url = dir + "/ChangeLog.txt";
      req = http_get( item:url, port:port );
      res = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );

      vers = eregmatch( pattern:"Version ([0-9.]+)", string:res );
      if( res =~ "^HTTP/1\.[01] 200" && ! isnull( vers[1] ) ) {
        version = vers[1];
        conclUrl = http_report_vuln_url( port:port, url:url, url_only:TRUE );
      }
    }

    set_kb_item( name:"paypal/merchant-sdk-php/installed", value:TRUE );

    cpe = build_cpe( value:version, exp:"^([0-9.]+)", base:"cpe:/a:paypal:merchant-sdk-php:" );
    if( isnull( cpe ) )
      cpe = "cpe:/a:paypal:merchant-sdk-php";

    register_product( cpe:cpe, location:install, port:port, service:"www" );

    log_message( data:build_detection_report( app:"PayPal PHP Merchant SDK",
                                              version:version,
                                              install:install,
                                              cpe:cpe,
                                              concludedUrl:conclUrl,
                                              concluded:vers[0] ),
                                              port:port );
  }
}

exit( 0 );