Home FTP Server 'MKD' Command Directory Traversal Vulnerability

2009-11-18T00:00:00
ID OPENVAS:100349
Type openvas
Reporter This script is Copyright (C) 2009 Greenbone Networks GmbH
Modified 2017-01-09T00:00:00

Description

Home FTP Server is prone to a directory-traversal vulnerability because the application fails to sufficiently sanitize user- supplied input.

Exploiting this issue allows an authenticated user to create directories outside the FTP root directory, which may lead to other attacks.

Home FTP Server 1.10.1.139 is vulnerable; other versions may also be affected.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
# $Id: home_ftp_server_37041.nasl 4970 2017-01-09 15:00:59Z teissa $
#
# Home FTP Server 'MKD' Command Directory Traversal Vulnerability
#
# Authors:
# Michael Meyer
#
# Copyright:
# Copyright (c) 2009 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 version 2
# (or any later version), as published by the Free Software Foundation.
#
# 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.
###############################################################################

tag_summary = "Home FTP Server is prone to a directory-traversal vulnerability
because the application fails to sufficiently sanitize user-
supplied input.

Exploiting this issue allows an authenticated user to create
directories outside the FTP root directory, which may lead to
other attacks.

Home FTP Server 1.10.1.139 is vulnerable; other versions may also
be affected.";

if (description)
{
 script_xref(name : "URL" , value : "http://www.securityfocus.com/bid/37041");
 script_xref(name : "URL" , value : "http://downstairs.dnsalias.net/homeftpserver.html");
 script_xref(name : "URL" , value : "http://www.securityfocus.com/archive/1/507932");
 script_id(100349);
 script_version("$Revision: 4970 $");
 script_tag(name:"last_modification", value:"$Date: 2017-01-09 16:00:59 +0100 (Mon, 09 Jan 2017) $");
 script_tag(name:"creation_date", value:"2009-11-18 12:44:57 +0100 (Wed, 18 Nov 2009)");
 script_bugtraq_id(37041);
 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_name("Home FTP Server 'MKD' Command Directory Traversal Vulnerability");
 script_tag(name:"qod_type", value:"remote_vul");
 script_category(ACT_GATHER_INFO);
 script_family("FTP");
 script_copyright("This script is Copyright (C) 2009 Greenbone Networks GmbH");
 script_dependencies("find_service.nasl","secpod_ftp_anonymous.nasl","ftpserver_detect_type_nd_version.nasl");
 script_require_ports("Services/ftp", 21);
 script_tag(name : "summary" , value : tag_summary);
 exit(0);
}

include("ftp_func.inc");

ftpPort = get_kb_item("Services/ftp");
if(!ftpPort){
  ftpPort = 21;
}

if(get_kb_item('ftp/'+ftpPort+'/broken'))exit(0);

if(!get_port_state(ftpPort)){
  exit(0);
}

banner = get_ftp_banner(port:ftpPort);
if("Home Ftp Server" >!< banner)exit(0);

soc1 = open_sock_tcp(ftpPort);
if(!soc1){
  exit(0);
}

domain = get_kb_item("Settings/third_party_domain");
if(isnull(domain)) {
 domain = this_host_name();;
}    

user = get_kb_item("ftp/login");
pass = get_kb_item("ftp/password");

if(!user)user = "anonymous";
if(!pass)pass = string("openvas@", domain);;

login_details = ftp_log_in(socket:soc1, user:user, pass:pass);

if(login_details)
{
  dir = string("OpenVAS_", rand());
  result = ftp_send_cmd(socket: soc1, cmd: string("MKD ../", dir));
  ftp_close(socket:soc1);
  close(soc1);
 
  if(result && "directory created" >< result) {
    report = string("It was possible to create the directory ", dir, " outside the FTP root directory.\n");
    security_message(port:ftpPort,data:report);
    exit(0);
  }
}

exit(0);