XM Easy Personal FTP Server Denial of Service Vulnerability

###############################################################################
# OpenVAS Vulnerability Test
# $Id: gb_xm_easyftp_dos_vuln.nasl 5657 2017-03-21 11:08:08Z cfi $
#
# XM Easy Personal FTP Server Denial of Service Vulnerability
#
# Authors:
# Sujit Ghosal <[email protected]>
#
# Copyright:
# Copyright (c) 2008 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 exploitation will let the authenticated user execute arbitrary
  codes in the context of the application and can crash the application.";
tag_affected = "Dxmsoft, XM Easy Personal FTP Server version 5.6.0 and prior";
tag_insight = "This flaw is due to a crafted argument to the NLST command.";
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.
  For updates refer to http://www.dxm2008.com";
tag_summary = "This host is running XM Easy FTP Personal FTP Server and is prone
  to Denial of Service Vulnerability.";

if(description)
{
  script_id(800211);
  script_version("$Revision: 5657 $");
  script_tag(name:"last_modification", value:"$Date: 2017-03-21 12:08:08 +0100 (Tue, 21 Mar 2017) $");
  script_tag(name:"creation_date", value:"2008-12-23 15:23:02 +0100 (Tue, 23 Dec 2008)");
  script_tag(name:"cvss_base", value:"4.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:S/C:N/I:N/A:P");
  script_bugtraq_id(31739);
  script_cve_id("CVE-2008-5626");
  script_name("XM Easy Personal FTP Server Denial of Service Vulnerability");
  script_xref(name : "URL" , value : "http://www.milw0rm.com/exploits/6741");

  script_category(ACT_GATHER_INFO);
  script_tag(name:"qod_type", value:"remote_banner");
  script_copyright("Copyright (C) 2008 Greenbone Networks GmbH");
  script_family("Denial of Service");
  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);
}


include("ftp_func.inc");
include("version_func.inc");

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

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

banner = get_ftp_banner(port:port);
if("DXM's FTP Server" >!< banner){
  exit(0);
}

dxmVer = eregmatch(pattern:"DXM's FTP Server ([0-9.]+)", string:banner);
if(dxmVer[1] != NULL)
{
  # Grep for version 5.6.0 and prior
  if(version_is_less_equal(version:dxmVer[1], test_version:"5.6.0")){
    security_message(port);
  }
}