Inim SmartLAN Hardcoded Credentials (Telnet)

# SPDX-FileCopyrightText: 2019 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:inim:smartlan_g";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.143258");
  script_version("2026-01-21T05:50:46+0000");
  script_tag(name:"last_modification", value:"2026-01-21 05:50:46 +0000 (Wed, 21 Jan 2026)");
  script_tag(name:"creation_date", value:"2019-12-17 03:16:07 +0000 (Tue, 17 Dec 2019)");
  script_tag(name:"cvss_base", value:"7.8");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:N/A:N");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2026-01-08 00:15:59 +0000 (Thu, 08 Jan 2026)");

  script_cve_id("CVE-2019-25291");

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

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

  script_name("Inim SmartLAN Hardcoded Credentials (Telnet)");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2019 Greenbone AG");
  script_family("Default Accounts");
  script_dependencies("gb_inim_smartlan_consolidation.nasl",
                      "gb_default_credentials_options.nasl");
  script_mandatory_keys("inim/smartlan/telnet/detected");
  script_require_ports("Services/telnet", 23);
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"summary", value:"SmartLAN devices utilize hardcoded credentials within its Linux
  distribution image.");

  script_tag(name:"vuldetect", value:"The script tries to login via Telnet with the default
  credentials.");

  script_tag(name:"insight", value:"The devices utilize hard-coded credentials within its Linux
  distribution image. These sets of credentials are never exposed to the end-user and cannot be
  changed through any normal operation of the smart home device.");

  script_tag(name:"impact", value:"An attacker could exploit this vulnerability by logging in and
  gain system access");

  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_xref(name:"URL", value:"https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5546.php");

  exit(0);
}

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

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

if (!port = get_app_port(cpe: CPE, service: "telnet"))
  exit(0);

if (!get_app_location(cpe: CPE, port: port, nofork:TRUE))
  exit(0);

creds = make_array("root", "pass",
                   "logout", "logout");
found = make_array();

foreach user (keys(creds)) {
  soc = open_sock_tcp(port);
  if (!soc)
    continue;

  recv = telnet_negotiate(socket: soc);
  if ("login:" >< recv) {
    send(socket: soc, data: user + '\r\n');
    recv = recv(socket: soc, length: 512);
    if ("Password:" >< recv) {
      send(socket: soc, data: creds[user] + '\r\n');
      recv = recv(socket:soc, length:1024);

      if ("Login incorrect" >!< recv) {
        send(socket: soc, data: 'id\r\n');
        recv = recv(socket:soc, length:1024);
        if (recv =~ "uid=[0-9]+.*gid=[0-9]+.*")
          found[user] = creds[user];
      }
    }
  }

  close(soc);
}

foreach user (keys(found))
  report += '\nUsername: ' + user + "   Password: " + found[user];

if (report) {
  report = 'It was possible to login with the following credentials:\n' + report;
  security_message(port: port, data: report);
  exit(0);
}

exit(99);