home *** CD-ROM | disk | FTP | other *** search
- #
- # (C) Tenable Network Security
- #
- #
- # Ref:
- # Date: Sat, 31 May 2003 13:58:58 +1200
- # From: Stephen Cope <mail@nonsense.kimihia.org.nz>
- # To: bugtraq@securityfocus.com
- # Subject: URLScan detection
-
-
- if(description)
- {
- script_id(11699);
- script_bugtraq_id(7767);
- script_version ("$Revision: 1.5 $");
-
- name["english"] = "URLScan Detection";
- script_name(english:name["english"]);
-
- desc["english"] = "
- The remote web server is using URLScan to protect itself,
- which is a good thing.
-
- However since it is possible to determine that URLScan is installed,
- an attacker may safely assume that the remote web server is
- Internet Information Server.
-
- Risk factor : None";
-
-
- script_description(english:desc["english"]);
-
- summary["english"] = "Detects the presence of URLScan";
- script_summary(english:summary["english"]);
-
- script_category(ACT_GATHER_INFO);
-
- script_copyright(english:"This script is Copyright (C) 2003 Tenable Network Security");
-
- family["english"] = "Misc.";
- script_family(english:family["english"]);
- script_dependencie("find_service.nes", "httpver.nasl");
- script_require_ports("Services/www", 80);
- exit(0);
- }
-
- #
-
- include("http_func.inc");
- include("http_keepalive.inc");
- include("misc_func.inc");
-
- port = get_http_port(default:80);
-
- if (! get_port_state(port)) exit(0);
-
-
- #
- # Method#1 : do a HTTP HEAD on a regular non-existant page and
- # a forbidden fruit, and compare the results (if UseFastPathReject
- # is disabled, we will identify the remote urlscan server).
- #
- soc = http_open_socket(port);
- if(!soc)exit(0);
- req = http_head(item:"/someunexistantstuff" + rand() + rand() + ".html", port:port);
- send(socket:soc, data:req);
- res = http_recv(socket:soc);
- close(soc);
- res = tolower(res);
- if( "<!doctype" >< res || "<html>" >< res ) exit(0);
-
-
- req = http_head(item:"/someunexistantstuff.exe", port:port);
- soc = http_open_socket(port);
- if(!soc)exit(0);
- send(socket:soc, data:req);
- res2 = http_recv(socket:soc);
- close(soc);
- res2 = tolower(res2);
-
- flag = 0;
- if( "<!doctype" >< res2 || "<html>" >< res2 ) { flag = 1; }
-
- #
- # Method#2 : Compare the results for a HTTP GET for a non-existant
- # page and a forbidden page (is UseFastPathReject is set, then we'll
- # note several differences).
- # If UseFastPathReject is set, we will receive a very very small error
- # message, whereas we will receive a much longer one if it's not
- #
- req = http_get(item:"/someunexistantantsutff" + rand() + rand() + ".html", port:port);
- res = http_keepalive_send_recv(port:port, data:req);
- if(!ereg(pattern:"^HTTP/[0-9]\.[0-9] 404 ", string:res))exit(0);
- if( res == NULL ) exit(0);
-
- req = http_get(item:"/someunexistantantsutff.exe", port:port);
- res2 = http_keepalive_send_recv(port:port, data:req);
- if(!ereg(pattern:"^HTTP/[0-9]\.[0-9] 404 ", string:res2))exit(0);
- if( res2 == NULL ) exit(0);
-
- if(strlen(res) > 2 * strlen(res2) && flag )security_note(port);
-
-