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- #
- # This script was written by Renaud Deraison <deraison@cvs.nessus.org>
- #
- # See the Nessus Scripts License for details
- #
-
- if(description)
- {
- script_id(10261);
- script_version ("$Revision: 1.23 $");
- script_cve_id("CAN-1999-0163");
- name["english"] = "Sendmail mailing to programs";
- name["francais"] = "Sendmail envoye des mails aux programmes";
- script_name(english:name["english"],
- francais:name["francais"]);
-
- desc["english"] = "
-
- The remote SMTP server did not complain when issued the
- command :
- MAIL FROM: root@this_host
- RCPT TO: |testing
-
- This probably means that it is possible to send mail directly
- to programs, which is a serious threat, since this allows
- anyone to execute arbitrary commands on this host.
-
- *** This security hole might be a false positive, since
- *** some MTAs will not complain to this test, but instead
- *** just drop the message silently.
-
- Solution : upgrade your MTA or change it.
-
- Risk factor : High";
-
-
- desc["francais"] = "
-
- Le serveur SMTP distant n'a pas refusΘ la
- suite de commandes suivante :
- MAIL FROM: root@this_host
- RCPT TO: |testing
-
- Cela signifie probablement qu'il est possible
- d'envoyer du courrier directement aux programmes,
- ce qui est un problΦme de sΘcuritΘ puisque
- cela permet α n'importe qui d'executer des
- commandes arbitraires sur cette machine.
-
- *** Ce problΦme de sΘcuritΘ peut etre
- *** une fausse alerte, puisque certains MTA
- *** ne refusent pas ces commandes mais ignorent
- *** le message envoyΘ.
-
- Solution : mettez α jour votre MTA ou changez-le/
-
- Facteur de risque : ElevΘ";
-
- script_description(english:desc["english"],
- francais:desc["francais"]);
-
-
- summary["english"] = "Checks if the remote mail server can be used to gain a shell";
- summary["francais"] = "VΘrifie si le serveur de mail distant peut etre utilisΘ obtenir un shell";
- script_summary(english:summary["english"],
- francais:summary["francais"]);
-
- script_category(ACT_GATHER_INFO);
-
- script_copyright(english:"This script is Copyright (C) 1999 Renaud Deraison",
- francais:"Ce script est Copyright (C) 1999 Renaud Deraison");
-
- family["english"] = "SMTP problems";
- family["francais"] = "ProblΦmes SMTP";
- script_family(english:family["english"], francais:family["francais"]);
- script_dependencie("find_service.nes", "sendmail_expn.nasl", "smtpserver_detect.nasl");
- script_exclude_keys("SMTP/wrapped",
- "SMTP/microsoft_esmtp_5",
- "SMTP/qmail",
- "SMTP/postfix");
- script_require_ports("Services/smtp", 25);
- exit(0);
- }
-
- #
- # The script code starts here
- #
-
- include("smtp_func.inc");
-
- port = get_kb_item("Services/smtp");
- if(!port)port = 25;
- if(get_port_state(port))
- {
- soc = open_sock_tcp(port);
- if(soc)
- {
- data = smtp_recv_banner(socket:soc);
- if("Sendmail" >!< data)exit(0);
- crp = string("HELO example.com\r\n");
- send(socket:soc, data:crp);
- data = recv_line(socket:soc, length:1024);
- crp = string("MAIL FROM: root@", get_host_name(), "\r\n");
- send(socket:soc, data:crp);
- data = recv_line(socket:soc, length:1024);
- crp = string("RCPT TO: |testing\r\n");
- send(socket:soc, data:crp);
-
- data = recv_line(socket:soc, length:4);
- if(data == "250 ")security_hole(port);
- close(soc);
- }
- }
-