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- #
- # This script was written by Renaud Deraison <deraison@cvs.nessus.org>
- #
- # See the Nessus Scripts License for details
- #
- #T
-
- if(description)
- {
- script_id(10061);
- script_version ("$Revision: 1.24 $");
- script_cve_id("CVE-1999-0103", "CAN-1999-0635");
- name["english"] = "Echo port open";
- name["francais"] = "Port echo ouvert";
- name["deutsch"] = "Echo Port offen";
- script_name(english:name["english"], francais:name["francais"], deutsch:name["deutsch"]);
-
- desc["english"] = "
- The remote host is running the 'echo' service. This service
- echoes any data which is sent to it.
-
- This service is unused these days, so it is strongly advised that
- you disable it, as it may be used by attackers to set up denial of
- services attacks against this host.
-
- Solution :
-
- - Under Unix systems, comment out the 'echo' line in /etc/inetd.conf
- and restart the inetd process
-
- - Under Windows systems, set the following registry key to 0 :
- HKLM\System\CurrentControlSet\Services\SimpTCP\Parameters\EnableTcpEcho
- HKLM\System\CurrentControlSet\Services\SimpTCP\Parameters\EnableUdpEcho
-
- Then launch cmd.exe and type :
-
- net stop simptcp
- net start simptcp
-
- To restart the service.
-
-
- Risk factor : Low";
-
-
- script_description(english:desc["english"]);
-
- summary["english"] = "Checks if the 'echo' port is open";
-
- script_summary(english:summary["english"]);
-
- script_category(ACT_GATHER_INFO);
-
-
- script_copyright(english:"This script is Copyright (C) 1999 Renaud Deraison");
-
- family["english"] = "Useless services";
-
- script_family(english:family["english"]);
- script_dependencie("find_service.nes");
-
- exit(0);
- }
-
-
- include("misc_func.inc");
-
-
- pattern = string("Harmless Nessus echo test");
-
- #
- # The script code starts here
- #
- include("pingpong.inc");
-
- port = get_kb_item("Services/echo");
- if(!port)port = 7;
- if(get_port_state(port))
- {
- soc = open_sock_tcp(port);
- if(soc)
- {
- data = string(pattern, "\r\n");
- send(socket:soc, data:data);
- res = recv_line(socket:soc, length:1024);
- if(pattern >< res)
- {
- security_warning(port);
- register_service(port:port, proto:"echo");
- }
- close(soc);
- }
- }
-
- if(get_udp_port_state(port))
- {
- soc = open_sock_udp(port);
- if(soc)
- {
- data = string(pattern, "\r\n");
- send(socket:soc, data:data);
- res2 = recv(socket:soc, length:1024);
- if(res2)
- {
- if(pattern >< res2)security_warning(port, protocol:"udp");
- # if (udp_ping_pong(port: port, data: data, answer: res2))
-
- }
- close(soc);
- }
- }
-
-