RM SafetyNet Plus XSS

# SPDX-FileCopyrightText: 2005 David Maciejak
# 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

# Ref: snkenjoi at gmail.com

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.18182");
  script_version("2023-08-01T13:29:10+0000");
  script_tag(name:"last_modification", value:"2023-08-01 13:29:10 +0000 (Tue, 01 Aug 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_xref(name:"OSVDB", value:"15543");
  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_name("RM SafetyNet Plus XSS");
  script_category(ACT_ATTACK);
  script_copyright("Copyright (C) 2005 David Maciejak");
  script_family("Web application abuses");
  script_dependencies("find_service.nasl", "no404.nasl", "webmirror.nasl", "DDI_Directory_Scanner.nasl", "cross_site_scripting.nasl", "global_settings.nasl");
  script_require_ports("Services/www", 80);
  script_exclude_keys("Settings/disable_cgi_scanning");

  script_tag(name:"solution", value:"Upgrade to the latest version of this software");

  script_tag(name:"summary", value:"The remote host runs SafetyNet Plus, a popular educational
  filtering service.

  This version is vulnerable to multiple cross-site scripting due
  to a lack of sanitization of user-supplied data.
  Successful exploitation of this issue may allow an attacker to execute
  malicious script code on a vulnerable server.");

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

  exit(0);
}

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

port = http_get_port( default:80 );
host = http_host_name( dont_add_port:TRUE );
if( http_get_has_generic_xss( port:port, host:host ) ) exit( 0 );

foreach dir( make_list_unique( "/", http_cgi_dirs( port:port ) ) ) {

  if( dir == "/" ) dir = "";
  url = string( dir, "/snpfiltered.pl?t=c&u=<script>foo</script>" );

  buf = http_get( item:url, port:port );
  res = http_keepalive_send_recv( port:port, data:buf );

  if( res =~ "^HTTP/1\.[01] 200" && ereg( pattern:"RM SafetyNet Plus</title>", string:res, icase:TRUE ) && ( "<script>foo</script>" >< res ) ) {
    report = http_report_vuln_url( port:port, url:url );
    security_message( port:port, data:report );
    exit( 0 );
  }
}

exit( 99 );