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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_version ("$Revision: 1.8 $");
- 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
- utilisΘ pour prendre le controle de celui-ci
- ou pour attaquer un autre rΘseau.
-
- Il est trΦs probable que ce systeme a ΘtΘ
- compromis
-
- Solution : reinstallez votre systΦme α partir
- des sauvegardes, et contactez le CERT
- et les autoritΘs locales
-
- Facteur de risque : Critique";
-
-
- script_description(english:desc["english"], francais:desc["francais"]);
-
- summary["english"] = "Detects the presence of TFN";
- summary["francais"] = "Detecte la prΘsence 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
- #
-
- if(islocalhost())exit(0);
-
- 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);
- }
-
-
-