Apache .htaccess and .htpasswd Disclosure

# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(106231);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/22");

  script_name(english:"Apache .htaccess and .htpasswd Disclosure");
  script_summary(english:"Checks if the .ht files can be accessed.");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server discloses information via HTTP request.");
  script_set_attribute(attribute:"description", value:
"The Apache server does not properly restrict access to .htaccess
and/or .htpasswd files. A remote unauthenticated attacker can
download these files and potentially uncover important information.");
  script_set_attribute(attribute:"solution", value:
"Change the Apache configuration to block access to these files.");
  script_set_attribute(attribute:"see_also",value:"https://www.owasp.org/index.php/SCG_WS_Apache");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N");
  script_set_attribute(attribute:"cvss_score_source", value:"manual");
  script_set_attribute(attribute:"cvss_score_rationale", value:"Tenable score for information disclosure.");

  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/22");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:apache:http_server");
  script_set_attribute(attribute:"exploited_by_nessus", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2018-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("apache_http_version.nasl");
  script_require_ports("Services/www", 80);
  script_require_keys("installed_sw/Apache");

  exit(0);
}

include('http.inc');
include('install_func.inc');
include('report.inc');

get_install_count(app_name:'Apache', exit_if_zero:TRUE);
var port = get_http_port(default:80);
var install = get_single_install(app_name:'Apache', port:port);

var files = ['/.htaccess', '/.htpasswd'];

var file, res, report_items;

foreach file (files)
{
  res = http_send_recv3(method:'GET', port:port, item:file);
  if ("200" >< res[0] && !empty_or_null(res[2]) && empty_or_null(get_kb_item("www/no404/" + port)))
  {
    if ('/.htpasswd' >< file || "</Directory>" >< res[2] || "</IfModule>" >< res[2])
    {
      report_items = {
        'requests' : [build_url(qs:file, port:port)],
        'file'     : file,
        'output'   : data_protection::sanitize_user_full_redaction(output:res[2])
      };

      report::build_and_report(port:port, severity:SECURITY_WARNING, report_items:report_items);
      exit(0);
    }
  }
}
audit(AUDIT_LISTEN_NOT_VULN, "Apache", port, install["version"]);