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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(10283);
script_cve_id("CAN-2000-0138");
name["english"] = "TFN Detect";
name["francais"] = "Detection de TFN";
script_name(english:name["english"], francais:name["francais"]);
desc["english"] = "
The remote host appears to be running
TFN (Tribe Flood Network), which is
a trojan that can be used to control
your system or make it attack another
network.
It is very likely that this host
has been compromised
Solution : Restore your system from backups,
contact CERT and your local
authorities
Risk factor : Critical";
desc["francais"] = "
Le systeme distant semble faire tourner
TFN (Tribe Flood Network) qui peut etre
utilis pour prendre le controle de celui-ci
ou pour attaquer un autre rseau.
Il est trs probable que ce systeme a t
compromis
Solution : reinstallez votre systme partir
des sauvegardes, et contactez le CERT
et les autorits locales
Facteur de risque : Critique";
script_description(english:desc["english"], francais:desc["francais"]);
summary["english"] = "Detects the presence of TFN";
summary["francais"] = "Detecte la prsence de TFN";
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"] = "Backdoors";
family["francais"] = "Backdoors";
script_family(english:family["english"], francais:family["francais"]);
exit(0);
}
#
# The script code starts here
#
ip = forge_ip_packet(ip_hl:5, ip_v:4, ip_off:0,
ip_id:9, ip_tos:0, ip_p : IPPROTO_ICMP,
ip_len : 20, ip_src : this_host(),
ip_ttl : 255);
#
# We send the command ID_SYNPORT (678) and wait for
# ID_ACK (123)
#
ID_ACK = 123;
ID_SYNPORT = 678;
icmp = forge_icmp_packet(ip:ip,icmp_type : 8, icmp_code:0,
icmp_seq : 1, icmp_id : ID_SYNPORT,
data:"1234");
filter = string("icmp and src host ", get_host_ip(), " and dst host ", this_host());
r = send_packet(icmp, pcap_active:TRUE, pcap_filter:filter);
if(r)
{
type = get_icmp_element(icmp:r, element:"icmp_id");
if(type == ID_ACK)security_hole(protocol:"icmp",port:0);
}
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