X-News '/db/users.txt' Information Disclosure Vulnerability

# SPDX-FileCopyrightText: 2004 Audun Larsen
# 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.12068");
  script_version("2023-12-13T05:05:23+0000");
  script_tag(name:"last_modification", value:"2023-12-13 05:05:23 +0000 (Wed, 13 Dec 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  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_cve_id("CVE-2002-1656");
  script_name("X-News '/db/users.txt' Information Disclosure Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2004 Audun Larsen");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "gb_php_http_detect.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_xref(name:"URL", value:"https://web.archive.org/web/20041214162916/http://www.ifrance.com/kitetoua/tuto/x_holes.txt");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/4283");

  script_tag(name:"summary", value:"X-News is prone to an information disclosure vulnerability.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET request and checks the response.");

  script_tag(name:"insight", value:"X-News stores user ids and passwords, as MD5 hashes, in a world-
  readable file, 'db/users.txt'. This is the same information that is issued by X-News in
  cookie-based authentication credentials.");

  script_tag(name:"impact", value:"An attacker may incorporate this information into cookies and
  then submit them to gain unauthorized access to the X-News administrative account.");

  script_tag(name:"solution", value:"Deny access to the files in the 'db' directory through the
  webserver.");

  script_tag(name:"qod_type", value:"remote_vul");
  script_tag(name:"solution_type", value:"Mitigation");

  exit(0);
}

include("http_func.inc");
include("http_keepalive.inc");
include("port_service_func.inc");
include("list_array_func.inc");

port = http_get_port(default:80);
if(!http_can_host_php(port:port))
  exit(0);

foreach dir(make_list_unique("/", http_cgi_dirs(port:port))) {

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

  res = http_get_cache(item:dir + "/x_news.php", port:port);
  if(!res || res !~ "^HTTP/1\.[01] 200")
    continue;

  if("Powered by <a href='http://www.xqus.com'>x-news</a>" >< res) {

    url = dir + "/db/users.txt";
    req2 = http_get(item:url, port:port);
    res2 = http_keepalive_send_recv(port:port, data:req2, bodyonly:FALSE);
    if(!res2 || res2 !~ "^HTTP/1\.[01] 200")
      continue;

    # e.g.:
    # user_id|username|pass(md5)|mail|user_level
    # where "user_level" is either 1, 2 or 3
    if(res2 =~ "[^|]+\|[^|]+\|[^|]+\|[^|]*\|[1-3]") {
      report = http_report_vuln_url(port:port, url:url);
      security_message(port:port, data:report);
      exit(0);
    }
  }
}

exit(99);