Ultimate Form Builder Lite for WordPress < 1.3.7 SQL Injection

#
# (C) Tenable Network Security, Inc.
#

include('compat.inc');

if (description)
{
  script_id(105023);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/06/06");

  script_cve_id("CVE-2017-15919");
  script_bugtraq_id(101604);

  script_name(english:"Ultimate Form Builder Lite for WordPress < 1.3.7 SQL Injection");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is running a PHP application that is affected
by a SQL Injection Vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Ultimate Form Builder
Lite Plugin for WordPress running on the remote web server is prior
to 1.3.7. It is therefore, affected by a SQL Injection vulnerability,
resulting in PHP Object Injection exploitation vectors.

With a specially crafted request, a remote, authenticated attacker
can inject PHP objects and potentially execute arbitrary code.

Note that Nessus has not tested for this issue but has instead relied
only on the application's self-reported version number.");
  script_set_attribute(attribute:"see_also", value:"https://wordpress.org/plugins/ultimate-form-builder-lite/");
  script_set_attribute(attribute:"see_also", value:"https://vuldb.com/?id.108649");
  script_set_attribute(attribute:"solution", value:
"Upgrade the Ultimate Form Builder Lite Plugin to version 1.3.7 or
later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-15919");

  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/10/26");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/10/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/05");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:wordpress:wordpress");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:accesspressthemes:ultimate-form-builder-lite");
  script_set_attribute(attribute:"enable_cgi_scanning", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2017-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("wordpress_detect.nasl");
  script_require_keys("installed_sw/WordPress", "www/PHP");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("http.inc");
include("url_func.inc");
include("webapp_func.inc");
include("misc_func.inc");

app = "WordPress";
get_install_count(app_name:app, exit_if_zero:TRUE);

port = get_http_port(default:80, php:TRUE);
install = get_single_install(
  app_name : app,
  port     : port
);

dir = install['path'];
install_url = build_url(port:port, qs:dir);
plugin_url = install_url + "wp-content/plugins/ultimate-form-builder-lite/";

plugin = 'Ultimate Form Builder Lite';
# Check KB first
installed = get_kb_item("www/"+port+"/webapp_ext/"+plugin+" under "+dir);

# if not found as installed from kb, check for regex in plugin dir
if (!installed)
{
  # Check for the following string in the url indicated below
  regexes[0] = make_list("form", "frontend");
  checks["/wp-content/plugins/ultimate-form-builder-lite/js/frontend.js"] = regexes;

  # Ensure plugin is installed
  installed = check_webapp_ext(
    checks : checks,
    dir    : dir,
    port   : port,
    ext    : plugin
  );
}

if (!installed)
  audit(AUDIT_WEB_APP_EXT_NOT_INST, app, install_url, plugin + " plugin");

# Get version from readme.txt
res = http_send_recv3(
  method : "GET",
  port   : port,
  item   : dir + "/wp-content/plugins/ultimate-form-builder-lite/readme.txt",
  exit_on_fail : TRUE
);

# Store response body for parsing data
body = res[2];

if ("Ultimate Form" >< body && "Access Keys" >< body)
{
  # Grab version
  match = pregmatch(pattern:"\bStable tag: ([0-9\.]+|$)", string:body);
  if (!empty_or_null(match)) version = match[1];
}
else
audit(AUDIT_UNKNOWN_WEB_APP_VER, plugin + " plugin included in the " + app + " install", plugin_url);

fix = '1.3.7';

# Compare version with fixed
if (ver_compare(ver:version, fix:fix, strict:FALSE) == -1)
{
  report =
  '\n WordPress URL     : ' + install_url +
  '\n Plugin URL        : ' + plugin_url +
  '\n Installed version : ' + version +
  '\n Fixed version     : ' + fix +
  '\n';
  security_report_v4(port:port, extra:report, severity:SECURITY_HOLE);
}
else audit(AUDIT_WEB_APP_EXT_NOT_AFFECTED, app, install_url, plugin + ' plugin', version);