DSS TFTP Server Path Traversal Vulnerability

2015-03-04T00:00:00
ID OPENVAS:1361412562310105957
Type openvas
Reporter This script is Copyright (C) 2015 Greenbone Networks GmbH
Modified 2017-10-26T00:00:00

Description

DSS TFTP Server is prone to a path traversal vulnerability.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_dsstftpserver_path_trav_vuln.nasl 7579 2017-10-26 11:10:22Z cfischer $
#
# DSS TFTP Server Path Traversal Vulnerability
#
# Authors:
# Christian Kuersteiner <christian.kuersteiner@greenbone.net>
#
# Copyright:
# Copyright (c) 2015 Greenbone Networks GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
###############################################################################

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.105957");
  script_version("$Revision: 7579 $");
  script_tag(name : "last_modification", value : "$Date: 2017-10-26 13:10:22 +0200 (Thu, 26 Oct 2017) $");
  script_tag(name : "creation_date", value : "2015-03-04 09:41:51 +0700 (Wed, 04 Mar 2015)");
  script_tag(name : "cvss_base", value : "6.4");
  script_tag(name : "cvss_base_vector", value : "AV:N/AC:L/Au:N/C:P/I:P/A:N");

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

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

  script_name("DSS TFTP Server Path Traversal Vulnerability");

  script_category(ACT_ATTACK);

  script_copyright("This script is Copyright (C) 2015 Greenbone Networks GmbH");
  script_family("Remote file access");
  script_dependencies("tftpd_detect.nasl", "os_detection.nasl");
  script_require_udp_ports("Services/udp/tftp", 69);

  script_tag(name : "summary", value : "DSS TFTP Server is prone to a path traversal vulnerability.");

  script_tag(name : "vuldetect", value : "Sends a crafted GET request and checks if it can
download some system files.");

  script_tag(name : "insight", value : "DSS TFTP 1.0 Server is a simple TFTP server that allows user
to download/upload files through the TFTP service from/to specified tftp root directory. The application
is vulnerable to path traversal that enables attacker to download/upload files outside the tftp
root directory.");

  script_tag(name : "impact", value : "Unauthenticated attackers can download/upload arbitrary files
outside the tftp root directory.");

  script_tag(name : "affected", value : "DSS TFTP 1.0 Server and below.");

  script_tag(name : "solution", value : "No solution or patch was made available
  for at least one year since 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_xref(name : "URL", value : "http://www.vulnerability-lab.com/get_content.php?id=1440");

  exit(0);
}

include("misc_func.inc");
include("tftp.inc");
include("network_func.inc");

port = get_kb_item("Services/udp/tftp");
if (!port)
  port = 69;

if (!check_udp_port_status(dport:port))
  exit(0);

files = traversal_files("windows");

foreach file(keys(files)) {
  res = tftp_get(port:port, path:".../.../.../.../.../.../.../" + files[file]);

  if (egrep(pattern:file, string:res, icase:TRUE)) {
    security_message(port:port);
    exit(0);
  }
}

exit(99);