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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(10390);
- script_version ("$Revision: 1.10 $");
- script_cve_id("CAN-2000-0138");
-
- name["english"] = "mstream agent Detect";
- name["francais"] = "Detection d'un agent mstream";
-
- script_name(english:name["english"], francais:name["francais"]);
-
- desc["english"] = "
- The remote host appears to be running
- a mstream agent, which is a trojan that can be
- used to control your system or make it
- attack another network (this is
- actually called a distributed denial
- of service attack tool)
-
- 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
- un agent mstream, qui peut etre utilisΘ pour prendre
- le controle de celui-ci ou pour attaquer un
- autre rΘseau (outil de dΘni de service
- distribuΘ)
-
- 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 a mstream agent";
- summary["francais"] = "Detecte la prΘsence d'un agent mstream";
-
- script_summary(english:summary["english"], francais:summary["francais"]);
-
- script_category(ACT_GATHER_INFO);
-
-
- script_copyright(english:"This script is Copyright (C) 2000 Renaud Deraison",
- francais:"Ce script est Copyright (C) 2000 Renaud Deraison");
- family["english"] = "Backdoors";
- family["francais"] = "Backdoors";
- script_family(english:family["english"], francais:family["francais"]);
- script_dependencie("find_service.nes");
-
- exit(0);
- }
-
-
-
- function detect(dport, sport)
- {
- command = string("ping\n");
- ip = forge_ip_packet(ip_hl:5, ip_v:4, ip_off:0,
- ip_id:9, ip_tos:0, ip_p : IPPROTO_UDP,
- ip_len : 20, ip_src : this_host(),
- ip_ttl : 255);
-
- len = 8 + strlen(command);
- udp = forge_udp_packet( ip:ip,
- uh_sport:65535,
- uh_dport:dport,
- uh_ulen : len,
- data:command);
-
- filter = string("udp and src host ", get_host_ip(), " and dst port ", sport, " and dst host ", this_host());
-
- r = send_packet(udp, pcap_active:TRUE, pcap_filter:filter, pcap_timeout:3);
- if(!isnull(r)) {
- dstport = get_udp_element(udp:r, element:"uh_dport");
- if(dstport == sport)return(1);
- else return(0);
- }
- else return(0);
- }
-
-
-
- if(detect(sport:6838, dport:10498))security_hole(10498);
- else if(detect(sport:9325, dport:7983))security_hole(7983);
-
-
-
-
-