Linksys Router Default Account (HTTP)

# SPDX-FileCopyrightText: 2008 Renaud Deraison
# 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_PREFIX = "cpe:/o:linksys:";

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.80070");
  script_version("2023-06-27T05:05:30+0000");
  script_tag(name:"last_modification", value:"2023-06-27 05:05:30 +0000 (Tue, 27 Jun 2023)");
  script_tag(name:"creation_date", value:"2008-10-24 23:33:44 +0200 (Fri, 24 Oct 2008)");
  script_xref(name:"OSVDB", value:"821");
  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_name("Linksys Router Default Account (HTTP)");

  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2008 Renaud Deraison");
  script_family("Default Accounts");
  script_dependencies("gb_linksys_devices_consolidation.nasl", "gb_default_credentials_options.nasl");
  script_require_ports("Services/www", 80);
  script_mandatory_keys("linksys/detected");
  script_exclude_keys("default_credentials/disable_default_account_checks");

  script_tag(name:"solution", value:"Connect to this port with a web browser, and click on the 'Password'
  section to set a strong password.");

  script_tag(name:"summary", value:"The remote Linksys device has its default account (no username / 'admin') set.");

  script_tag(name:"impact", value:"An attacker may connect to it and reconfigure it using this account.");

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

if( ! infos = get_app_port_from_cpe_prefix( cpe:CPE_PREFIX, service:"www" ) )
  exit( 0 );

port = infos["port"];
CPE = infos["cpe"];

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

res = http_get_cache( item:"/", port:port );
if( ! res || res !~ "^HTTP/1\.[01] 401" )
  exit( 0 );

req = http_get( item:"/", port:port );
req -= string( "\r\n\r\n" );
req += string( "\r\nAuthorization: Basic OmFkbWlu\r\n\r\n" );
res = http_keepalive_send_recv( port:port, data:req, bodyonly:FALSE );
if( ! res )
  exit( 0 );

if( res =~ "^HTTP/1\.[01] 200" ) {
  security_message( port:port );
  exit( 0 );
}

exit( 99 );