OpenVPN Access Server Detection Consolidation

# SPDX-FileCopyrightText: 2020 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("1.3.6.1.4.1.25623.1.0.143935");
  script_version("2025-11-05T05:40:07+0000");
  script_tag(name:"last_modification", value:"2025-11-05 05:40:07 +0000 (Wed, 05 Nov 2025)");
  script_tag(name:"creation_date", value:"2020-05-19 06:40:44 +0000 (Tue, 19 May 2020)");
  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:"qod_type", value:"remote_banner");

  script_name("OpenVPN Access Server Detection Consolidation");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2020 Greenbone AG");
  script_family("Product detection");
  script_dependencies("gb_openvpn_access_server_ssh_login_detect.nasl",
                      "gb_openvpn_access_server_http_detect.nasl");
  script_mandatory_keys("openvpn/access_server/detected");

  script_tag(name:"summary", value:"Consolidation of OpenVPN Access Server detections.");

  script_xref(name:"URL", value:"https://openvpn.net/vpn-server/");

  exit(0);
}

if (!get_kb_item("openvpn/access_server/detected"))
  exit(0);

include("cpe.inc");
include("host_details.inc");
include("os_func.inc");

detected_version = "unknown";
location = "/";

foreach source (make_list("ssh-login", "http")) {
  version_list = get_kb_list("openvpn/access_server/" + source + "/*/version");
  foreach version (version_list) {
    if (version != "unknown" && detected_version == "unknown") {
      detected_version = version;
      break;
    }
  }
}

cpe = build_cpe(value: detected_version, exp: "^([0-9.]+)", base: "cpe:/a:openvpn:openvpn_access_server:");
if (!cpe)
  cpe = "cpe:/a:openvpn:openvpn_access_server";

os_register_and_report(os: "Linux", cpe: "cpe:/o:linux:kernel",
                       desc: "OpenVPN Access Server Detection Consolidation", runs_key: "unixoide");

if (ssh_login_ports = get_kb_list("openvpn/access_server/ssh-login/port")) {
  extra += 'Local Detection over SSH:\n';

  foreach port (ssh_login_ports) {
    concluded = get_kb_item("openvpn/access_server/ssh-login/" + port + "/concluded");
    concluded_file = get_kb_item("openvpn/access_server/ssh-login/" + port + "/concluded_file");
    extra += '  Port:                          ' + port + '/tcp\n';

    if (concluded) {
      extra += '  Concluded from version/product\n';
      extra += '  identification result:         ' + concluded;
    }
    if (concluded_file) {
      if (concluded)
        extra += '\n';
      extra += '  Concluded from version/product\n';
      extra += '  identification location:       ' + concluded_file;
    }

    register_product(cpe: cpe, location: "/", port: port, service: "ssh-login");
  }
}

if (http_ports = get_kb_list("openvpn/access_server/http/port")) {
  if (extra)
    extra += '\n\n';

  extra += 'Remote Detection over HTTP(s):\n';

  foreach port (http_ports) {
    concluded = get_kb_item("openvpn/access_server/http/" + port + "/concluded");
    extra += '  Port:               ' + port + '/tcp\n';
    extra += '  Location:           ' + location + '\n';
    extra += '  Concluded from:     ' + concluded;

    conclUrl = get_kb_item("openvpn/access_server/http/" + port + "/concludedUrl");
    if (conclUrl)
      extra += '\n  Concluded from URL: ' + conclUrl;

    if (detected_version == "unknown") {
      error = get_kb_item("openvpn/access_server/http/" + port + "/error");
    }

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

report = build_detection_report(app: "OpenVPN Access Server", version: detected_version, cpe: cpe,
                                install: location, extra: error);

if( extra ) {
  report += '\n\nDetection methods:\n';
  report += '\n' + extra;
}

log_message(port: 0, data: report);

exit(0);