smb2www Proxy Bypass

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

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

if (description)
{
  script_id(11377);
  script_version("1.17");
  script_set_attribute(attribute:"plugin_modification_date", value:"2022/04/11");

  script_name(english:"smb2www Proxy Bypass");

  script_set_attribute(attribute:"synopsis", value:
"The remote CGI is vulnerable to an access control breach.");
  script_set_attribute(attribute:"description", value:
"The remote host is running smb2www - a SMB to WWW gateway.

An attacker may use this CGI to use this host as a proxy -
The attacker can then connect to a third-party SMB host without
revealing an IP address.");
  script_set_attribute(attribute:"solution", value:
"Enforce proper access controls to this CGI.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");

  script_set_attribute(attribute:"plugin_publication_date", value:"2003/03/14");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"asset_inventory", value:"True");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:smb2www:smb2www");
  script_set_attribute(attribute:"thorough_tests", value:"true");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"CGI abuses");

  script_copyright(english:"This script is Copyright (C) 2003-2022 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("http_version.nasl", "find_service1.nasl", "no404.nasl");
  script_exclude_keys("Settings/disable_cgi_scanning");
  script_require_ports("Services/www", 80);

  exit(0);
}

# Check starts here

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

port = get_http_port(default:80);

dirs = make_list("/samba");

foreach d (cgi_dirs())
{
 dirs = make_list(dirs, d, string(d, "/samba"));
}

foreach d (dirs)
{
  w = http_send_recv3(method:"GET", item:string(d, "/smb2www.pl"), port:port);
  if (isnull(w)) exit(1, "The web server on port "+port+" did not answer");
  res = strcat(w[0], w[1], '\r\n', w[2]);

 if("Welcome to the SMB to WWW gateway" >< res){
 	security_warning(port);
	exit(0);
	}
}