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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(10438);
- script_bugtraq_id(1297);
- script_version ("$Revision: 1.20 $");
- script_cve_id("CVE-2000-0490");
- name["english"] = "Netwin's DMail ETRN overflow";
- name["francais"] = "DΘpassement de buffer ETRN dans DMail de Netwin";
- script_name(english:name["english"],
- francais:name["francais"]);
-
- desc["english"] = "
- The remote SMTP server is vulnerable to a buffer
- overflow when the ETRN command is issued arguments
- which are too long.
-
- This problem may allow an attacker to shut this server
- down or to execute arbitrary code on this host.
-
- Solution : Contact your vendor for a fix. If you are using
- Netwin's DMail, then upgrade to version 2.7r or newer.
-
- Risk factor : High";
-
-
- desc["francais"] = "
- Le serveur SMTP distant est vulnΘrable α un dΘpassement
- de buffer lorsqu'un argument trop long est passΘ α la commande
- ETRN.
-
- Ce problΦme peut permettre α un pirate de couper ce serveur
- ou bien meme d'executer du code arbitraire sur ce systΦme.
-
- Solution : Contactez votre vendeur pour un patch. Si vous utilisez
- DMail de Netwin, alors mettez-le α jour en version 2.7r
-
- Facteur de risque : ElevΘ";
-
-
- script_description(english:desc["english"],
- francais:desc["francais"]);
-
-
- summary["english"] = "Checks if the remote mail server is vulnerable to a ETRN overflow";
- summary["francais"] = "VΘrifie si le serveur de mail est vulnΘrable a un overflow ETRN";
- script_summary(english:summary["english"],
- francais:summary["francais"]);
-
- script_category(ACT_MIXED_ATTACK); # mixed
-
- script_copyright(english:"This script is Copyright (C) 2000 Renaud Deraison",
- francais:"Ce script est Copyright (C) 2000 Renaud Deraison");
-
- family["english"] = "Gain root remotely";
- family["francais"] = "Passer root α distance";
- script_family(english:family["english"], francais:family["francais"]);
- script_dependencie("find_service.nes", "sendmail_expn.nasl");
- script_exclude_keys("SMTP/wrapped");
- 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(safe_checks())
- {
- banner = get_smtp_banner(port:port);
-
- if(banner)
- {
- if("2.7r" >< banner)exit(0);
-
- if(egrep(string:banner,
- pattern:"^220.*DSMTP ESMTP Server v2\.([0-7]q*|8[a-h]).*"))
- {
- alrt = "
- The remote DMAIL SMTP server may be vulnerable to a buffer
- overflow when the ETRN command is issued an argument that
- is too long.
-
- This problem may allow an attacker to shut this server
- down or to execute arbitrary code on this host.
-
- *** Nessus reports this vulnerability using only
- *** information that was gathered. Use caution
- *** when testing without safe checks enabled.
-
- Solution : Contact your vendor for a fix. If you are using
- Netwin's DMail, then upgrade to version 2.7r or newer.
-
- Risk factor : High";
- security_hole(port:port, data:alrt);
- }
- }
- exit(0);
- }
-
-
- if(get_port_state(port))
- {
- soc = open_sock_tcp(port);
- if(soc)
- {
- data = smtp_recv_banner(socket:soc);
- crp = string("HELO example.com\r\n");
- send(socket:soc, data:crp);
- data = recv_line(socket:soc, length:1024);
- crp = string("ETRN ", crap(500), "\r\n");
- send(socket:soc, data:crp);
- send(socket:soc, data:string("QUIT\r\n"));
- close(soc);
-
- soc2 = open_sock_tcp(port);
- if(!soc2)security_hole(port);
- else close(soc2);
- }
- }
-