ASUS Router Multiple Vulnerabilities (Feb 2014) - Active Check

# SPDX-FileCopyrightText: 2014 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("1.3.6.1.4.1.25623.1.0.903432");
  script_version("2025-08-22T15:40:55+0000");
  script_tag(name:"last_modification", value:"2025-08-22 15:40:55 +0000 (Fri, 22 Aug 2025)");
  script_tag(name:"creation_date", value:"2014-02-26 16:37:32 +0530 (Wed, 26 Feb 2014)");
  script_tag(name:"cvss_base", value:"4.3");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");

  script_cve_id("CVE-2015-1437");

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

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

  script_name("ASUS Router Multiple Vulnerabilities (Feb 2014) - Active Check");

  script_category(ACT_ATTACK);

  script_copyright("Copyright (C) 2014 Greenbone AG");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "httpver.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"summary", value:"ASUS Routers are prone to multiple vulnerabilities.");

  script_tag(name:"vuldetect", value:"Sends a crafted HTTP GET request and checks the response.");

  script_tag(name:"insight", value:"The following flaws exist:

  - The error page is accessible without authentication. This allows the attacker to bypass
  same-origin policy restrictions enforced by XMLHttpRequest.

  - The router error page 'error_page.htm' includes the current administrative password in clear
  text.");

  script_tag(name:"impact", value:"Successful exploitation will allow remote attackers to insert
  arbitrary HTML and script code, which will be executed in a user's browser session in the context
  of an affected site and also can conduct phishing attacks.");

  script_tag(name:"affected", value:"- ASUS RT-N16

  - ASUS RT-N10U, firmware 3.0.0.4.374_168

  - ASUS RT-N56U, firmware 3.0.0.4.374_979

  - ASUS DSL-N55U, firmware 3.0.0.4.374_1397

  - ASUS RT-AC66U, firmware 3.0.0.4.374_2050

  - ASUS RT-N15U, firmware 3.0.0.4.374_16

  - ASUS RT-N53, firmware 3.0.0.4.374_311");

  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://sintonen.fi/advisories/asus-router-auth-bypass.txt");
  script_xref(name:"URL", value:"http://exploitsdownload.com/exploit/na/asus-router-authentication-bypass-cross-site-scripting");

  exit(0);
}

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

port = http_get_port(default: 80);

banner = http_get_remote_headers(port: port);

if (banner =~ 'WWW-Authenticate: Basic realm=".*(RT-|DSL-).*"') {
  url = "/error_page.htm?flag=%27%2balert(document.cookie)%2b%27";

  if (http_vuln_check(port: port, url: url, pattern: "alert\(document\.cookie\)", check_header: TRUE,
                      extra_check: make_list("reboot_time"))) {
    report = http_report_vuln_url(port: port, url: url);
    security_message(port: port, data: report);
    exit(0);
  }
}

exit(0);