Huawei VRP Default Credentials (Telnet)

# SPDX-FileCopyrightText: 2020 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("1.3.6.1.4.1.25623.1.0.108758");
  script_version("2025-05-28T05:40:15+0000");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"last_modification", value:"2025-05-28 05:40:15 +0000 (Wed, 28 May 2025)");
  script_tag(name:"creation_date", value:"2020-04-24 10:19:23 +0000 (Fri, 24 Apr 2020)");
  script_name("Huawei VRP Default Credentials (Telnet)");
  script_category(ACT_ATTACK);
  script_family("Default Accounts");
  script_copyright("Copyright (C) 2020 Greenbone AG");
  # nb: Don't use the keys or dependencies to / from gb_huawei_vrp_network_device_consolidation.nasl
  # / gb_huawei_vrp_network_device_telnet_detect.nasl because
  # telnetserver_detect_type_nd_version.nasl is checking for an additional banner which isn't
  # necessarily a VRP device.
  script_dependencies("telnetserver_detect_type_nd_version.nasl",
                      "gb_default_credentials_options.nasl");
  script_require_ports("Services/telnet", 23);
  script_mandatory_keys("telnet/huawei/vrp/detected");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_xref(name:"URL", value:"https://support.huawei.com/enterprise/en/doc/EDOC1000060368/25506195/understanding-the-list-of-default-user-names-and-passwords");
  script_xref(name:"URL", value:"https://support.huawei.com/enterprise/en/doc/EDOC1000079719/1b8f7bdb/logging-in-to-an-ar-router-through-a-web-system");

  script_tag(name:"summary", value:"The remote Huawei Versatile Routing Platform (VRP) device is
  using known default credentials for the Telnet login.");

  script_tag(name:"vuldetect", value:"Tries to login via Telnet using known default credentials.");

  script_tag(name:"insight", value:"The remote Huawei Versatile Routing Platform (VRP) device is
  lacking a proper password configuration, which makes critical information and actions accessible
  for people with knowledge of the default credentials.");

  script_tag(name:"impact", value:"This issue may be exploited by a remote attacker to gain access
  to sensitive information or modify system configuration.");

  script_tag(name:"solution", value:"Change the default password.");

  script_tag(name:"solution_type", value:"Mitigation");
  script_tag(name:"qod_type", value:"remote_vul");

  exit(0);
}

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

include("telnet_func.inc");
include("misc_func.inc");
include("port_service_func.inc");
include("dump.inc");

creds = make_list(
  "admin:[email protected]",
  "admin:admin",
  "admin:Admin@huawei",
  "admin:Admin@123",
  "root:admin",
  "super:sp-admin"
);

cmd = "display version";

report = 'It was possible to login to the remote Huawei VRP device via Telnet with the following known credentials:';

port = telnet_get_port( default:23 );

banner = telnet_get_banner( port:port );
if( ! banner || ( "Warning: Telnet is not a secure protocol, and it is recommended to use Stelnet." >!< banner && ( "Login authentication" >!< banner || "Username:" >!< banner ) ) )
  exit( 0 );

foreach cred( creds ) {

  if( ! soc = open_sock_tcp( port ) )
    continue;

  split = split( cred, sep:":", keep:FALSE );
  if( max_index( split ) != 2 ) {
    telnet_close_socket( socket:soc );
    continue;
  }

  username = split[0];
  password = split[1];

  banner = telnet_negotiate( socket:soc );
  if( ! banner || "Username:" >!< banner ) {
    telnet_close_socket( socket:soc, data:banner );
    if( "%connection refused by remote host!" >< banner )
      exit( 0 ); # We're blocked, no need to continue here...
    else
      continue;
  }

  send( socket:soc, data:username + '\r\n' );
  sleep( 3 ); # nb: The devices requires quite some time to answer so wait for a few seconds.
  res = recv( socket:soc, length:128 );
  if( ! res || "Password:" >!< res ) {
    telnet_close_socket( socket:soc, data:res );
    continue;
  }

  send( socket:soc, data:password + '\r\n' );
  sleep( 3 ); # nb: The devices requires quite some time to answer so wait for a few seconds.
  res = recv( socket:soc, length:128 );

  if( ! res || "Error: Authentication fail" >< res ) {
    telnet_close_socket( socket:soc, data:res );
    # nb: We're waiting here because of the two "admin" accounts with different passwords.
    if( wait = eregmatch( string:res, pattern:"(Please retry after|Login authentication failed\. Please wait for) ([0-9]+) seconds\.", icase:FALSE ) )
      sleep( int( wait[2] ) + 1 );
    else
      sleep( 6 ); # fallback
    continue;
  }

  send( socket:soc, data:cmd + '\r\n' );
  sleep( 3 ); # nb: The devices requires quite some time to answer so wait for a few seconds.
  cmd_res = recv( socket:soc, length:1024 );
  telnet_close_socket( socket:soc, data:cmd_res );

  if( display_vers = egrep( pattern:"(Huawei Versatile Routing Platform|VRP \(R\) software)", string:cmd_res ) ) {
    vuln = TRUE;
    report += '\n\nUsername: "' + username  + '", Password: "' + password + '"';
    report += '\n\nIt was also possible to execute "' + cmd + '" as "' + username + '". Result:\n\n' + chomp( display_vers );
  }
}

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

exit( 99 );