ISC BIND Detection (DNS)

# SPDX-FileCopyrightText: 2005 SecuriTeam
# SPDX-FileCopyrightText: New / improved code since 2009 Greenbone AG
# 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

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.10028");
  script_version("2025-10-31T05:40:56+0000");
  script_tag(name:"last_modification", value:"2025-10-31 05:40:56 +0000 (Fri, 31 Oct 2025)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_tag(name:"cvss_base", value:"0.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:N/A:N");

  script_tag(name:"qod_type", value:"remote_banner");

  script_name("ISC BIND Detection (DNS)");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2005 SecuriTeam");
  script_family("Product detection");
  script_dependencies("dns_server.nasl", "dns_server_tcp.nasl");
  script_mandatory_keys("dns/server/detected");

  script_tag(name:"summary", value:"DNS (TCP and UDP) based detection of ISC BIND.");

  exit(0);
}

include("host_details.inc");

function getVersion( data, port, proto ) {

  local_var data, port, proto;
  local_var ver, version, update;

  if( ! data )
    return;

  # nb: Some testing pattern for the complex regex below:
  #
  # data = "9.9.5-9+deb8u14-Debian";
  # data = "9.8.2rc1-RedHat-9.8.2-0.68.rc1.el6";
  # data = "9.11.4-P2-RedHat-9.11.4-9.P2.el7";
  # data = "9.7.0-P1";
  # data = "9.8.7-W1";
  # data = "9.4-ESV";
  # data = "9.4-ESVb1";
  # data = "9.6-ESV-R11-W1";
  # data = "9.6-ESV-R5-P1";
  # data = "9.4-ESV-R5b1";
  # data = "9.6-ESV-R8rc1";
  # data = "9.6.0a1";
  # data = "9.6.0b1";
  # data = "9.2.5beta2";
  # data = "9.3.5-P2-W1";
  # data = "9.10.3-P4-Ubuntu";
  # data = "9.11.3-1ubuntu1.11-Ubuntu";
  # data = "ISC BIND 8.4.4";
  # data = "ISC BIND 8.3.0-RC1 -- 8.4.4";
  # data = "9.11.3-S1"; -> "Supported Preview Edition"
  # data = "9.18.28-1~deb12u2-Debian";
  # data = "9.18.33-1~deb12u2-Debian";

  # nb: Other products like dnsmasq and similar have a text pattern like dnsmasq-1.2.3 prepended
  # so we should be able to differentiate here if the version response doesn't start with something
  # like e.g. "9.4". That's why the "^" anchor is used.
  ver = eregmatch( pattern:"^((ISC )?BIND )?([0-9.]{3,})(-ESV-?|-)?((rc|RC|P|R|W|S|a|b|beta)[0-9]+)?(-?(rc|RC|P|R|W|S|a|b|beta)[0-9]+)?", string:data, icase:FALSE );
  if( ! ver[3] )
    return;

  version = ver[3];

  if( ver[5] ) {
    update = ver[5];
    if( ver[7] )
      update += ver[7];
  }

  set_kb_item( name:"isc/bind/detected", value:TRUE );
  set_kb_item( name:"isc/bind/domain/detected", value:TRUE );
  set_kb_item( name:"isc/bind/domain/" + port + "/installs", value:port + "#---#" + port + "/" + proto + "#---#" + version + "#---#" + update + "#---#" + proto + "#---#" + data );
}

udp_ports = get_kb_list( "DNS/udp/version_request" );
foreach port( udp_ports ) {

  data = get_kb_item( "DNS/udp/version_request/" + port );
  if( ! data )
    continue;

  # Don't detect dnsmasq or PowerDNS as BIND.
  if( "dnsmasq" >< tolower( data ) || "powerdns" >< tolower( data ) )
    continue;

  getVersion( data:data, port:port, proto:"udp" );
}

tcp_ports = get_kb_list( "DNS/tcp/version_request" );
foreach port( tcp_ports ) {

  data = get_kb_item( "DNS/tcp/version_request/" + port );
  if( ! data )
    continue;

  # Don't detect dnsmasq or PowerDNS as BIND.
  if( "dnsmasq" >< tolower( data ) || "powerdns" >< tolower( data ) )
    continue;

  getVersion( data:data, port:port, proto:"tcp" );
}

exit( 0 );