CompleteFTP Directory Traversal Vulnerability

# SPDX-FileCopyrightText: 2010 Greenbone AG
# 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("1.3.6.1.4.1.25623.1.0.100615");
  script_version("2025-01-17T15:39:18+0000");
  script_tag(name:"last_modification", value:"2025-01-17 15:39:18 +0000 (Fri, 17 Jan 2025)");
  script_tag(name:"creation_date", value:"2010-04-30 13:41:49 +0200 (Fri, 30 Apr 2010)");
  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("CompleteFTP Directory Traversal Vulnerability");
  script_category(ACT_GATHER_INFO);
  script_family("FTP");
  script_copyright("Copyright (C) 2010 Greenbone AG");
  script_dependencies("ftpserver_detect_type_nd_version.nasl");
  script_require_ports("Services/ftp", 21);
  script_mandatory_keys("ftp/complete/ftp/detected");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/39802");

  script_tag(name:"summary", value:"CompleteFTP is prone to a directory traversal vulnerability because it
  fails to sufficiently sanitize user-supplied input.");

  script_tag(name:"impact", value:"Exploiting this issue can allow an attacker to download arbitrary
  files outside of the FTP server root directory. This may aid in further attacks.");

  script_tag(name:"affected", value:"CompleteFTP 3.3.0 is vulnerable. Other versions may also be affected.");

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

  script_tag(name:"solution", value:"No known solution was made available for at least one year since the 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_tag(name:"qod_type", value:"remote_banner");

  exit(0);
}

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

port = ftp_get_port( default:21 );
if( ! banner = ftp_get_banner( port:port ) ) exit( 0 );
if( "220-Complete FTP server" >!< banner ) exit( 0 );

version = eregmatch( pattern:"220 FTP Server v ([0-9.]+)", string:banner );

if( ! isnull( version[1] ) ) {
  if( version_in_range( version:version[1], test_version:"3.0.0", test_version2:"3.3.0" ) ) {
    security_message( port:port );
    exit( 0 );
  }
}

exit( 99 );