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- #
- # This script was written by Javier Fernßndez-Sanguino Pe±a <jfs@computer.org>
- # based on scripts made by Renaud Deraison <deraison@cvs.nessus.org>
- #
- # Slightly modified by rd to to do pattern matching.
- #
- # See the Nessus Scripts License for details
- #
-
- if(description)
- {
- script_id(10781);
- script_bugtraq_id(3301);
- script_cve_id("CVE-2001-0660");
- script_version ("$Revision: 1.17 $");
-
- name["english"] = "Outlook Web anonymous access";
- script_name(english:name["english"]);
-
- desc["english"] = "
- It is possible to browse the information of the OWA server by accessing as an
- anonymous user with the following URL:
-
- http://www.example.com/exchange/root.asp?acs=anon
-
- After this access, the anonymous user can search for valid users in the OWA
- server and can enumerate all users by accessing the following URL:
-
- http://www.example.com/exchange/finduser/details.asp?obj=XXX
- (where XXX is a string of 65 hexadecimal numbers)
-
- Data that can be accessed by an anonymous user
- may include: usernames, server names, email name accounts,
- phone numbers, departments, office, management relationships...
-
- This information will help an attacker to make social
- engineering attacks with the knowledge gained. This attack
- can be easily automated since, even if direct access to search
- is not possible, you only need the cookie given on the anonymous
- login access.
-
- Administrators might be interested in consulting
- the following URL:
-
- http://support.microsoft.com/support/exchange/content/whitepapers/owaguide.doc
-
- Solution:
- Disable anonymous access to OWA. Follow these steps:
- 1. In Microsoft Exchange Administrator open the Configuration container.
- 2. Choose Protocols, and then double-click HTTP (Web) Site Settings
- 3. Unselect the 'Allow anonymous users to access
- the anonymous public folders' check box.
- 4. Select the Folder Shortcuts tab.
- 5. Remove all folders which are allowed anonymous viewing.
- 6. Choose OK.
- 7. Remove the anonymous access from the login web pages.
-
- Risk factor : Medium";
-
- script_description(english:desc["english"]);
-
- summary["english"] = "Outlook Web anonymous access";
- script_summary(english:summary["english"]);
-
- script_category(ACT_GATHER_INFO);
-
-
- script_copyright(english:"This script is Copyright (C) 2001 Javier Fernßndez-Sanguino Pe±a");
- family["english"] = "CGI abuses";
- script_family(english:family["english"]);
- script_dependencie("find_service.nes", "http_version.nasl", "www_fingerprinting_hmap.nasl");
- script_require_ports("Services/www", 80);
- exit(0);
- }
-
- #
- # The script code starts here
- #
-
- include("http_func.inc");
- include("http_keepalive.inc");
-
- port = get_http_port(default:80);
-
- if ( ! can_host_asp(port:port) ) exit(0);
-
-
-
-
-
- cgi = "/exchange/root.asp?acs=anon";
- if(is_cgi_installed_ka(item:cgi, port:port))
- {
- soc = http_open_socket(port);
- req = http_get(item:"/exchange/root.asp?acs=anon", port:port);
- send(socket:soc, data:req);
- r = http_recv(socket:soc);
- http_close_socket(soc);
- if ("/exchange/logonfrm.asp" >< r)
- {
- soc = http_open_socket(port);
- req = http_get(item:"/exchange/logonfrm.asp", port:port);
- send(socket:soc, data:req);
- r = http_recv(socket:soc);
- http_close_socket(soc);
-
- if (!("This page has been disabled" >< r))
- {
- security_warning(port);
- }
- }
- }
-