Use LDAP search request to retrieve information from NT Directory Services

# SPDX-FileCopyrightText: 2004 David Kyger
# 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("1.3.6.1.4.1.25623.1.0.12105");
  script_version("2023-07-12T05:05:05+0000");
  script_tag(name:"last_modification", value:"2023-07-12 05:05:05 +0000 (Wed, 12 Jul 2023)");
  script_tag(name:"creation_date", value:"2005-11-03 14:08:04 +0100 (Thu, 03 Nov 2005)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:N/A:N");
  script_name("Use LDAP search request to retrieve information from NT Directory Services");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2004 David Kyger");
  script_family("Remote file access");
  script_dependencies("ldap_detect.nasl");
  script_require_ports("Services/ldap", 389);
  script_mandatory_keys("ldap/detected");

  script_tag(name:"summary", value:"It is possible to disclose LDAP information.");

  script_tag(name:"insight", value:"The directory base of the remote server is set
  to NULL. This allows information to be enumerated without any prior knowledge of
  the directory structure.");

  script_tag(name:"solution", value:"If pre-Windows 2000 compatibility is not required, remove
  pre-Windows 2000 compatibility as follows :

  - start cmd.exe

  - execute the command :
    net localgroup  'Pre-Windows 2000 Compatible Access' everyone /delete

  - restart the remote host");

  script_tag(name:"solution_type", value:"Workaround");
  script_tag(name:"qod_type", value:"remote_vul");

  exit(0);
}

include("ldap.inc");
include("string_hex_func.inc");
include("port_service_func.inc");

port = ldap_get_port( default:389 );
if( ldap_is_v3( port:port ) )
  exit( 0 );

soc = open_sock_tcp( port );
if( ! soc )
  exit( 0 );

senddata = raw_string( 0x30, 0x25, 0x02, 0x01, 0x01, 0x63, 0x20, 0x04, 0x00, 0x0a,
                       0x01, 0x00, 0x0a, 0x01, 0x00, 0x02, 0x01, 0x00, 0x02, 0x01,
                       0x00, 0x01, 0x01, 0x00, 0x87, 0x0b, 0x6f, 0x62, 0x6a, 0x65,
                       0x63, 0x74, 0x63, 0x6c, 0x61, 0x73, 0x73, 0x30, 0x00 );

send( socket:soc, data:senddata );
buf = recv( socket:soc, length:4096 );
close( soc );
if( ! buf )
  exit( 0 );

if( "NTDS" >< buf ) {
  hbuf = hexstr( buf );
  ntdsinfo = strstr( hbuf, "4e54445320" );
  ntdsinfo = ntdsinfo - strstr( ntdsinfo, "308400" );
  ntdsinfo = hex2raw( s:ntdsinfo );
  warning += string( ntdsinfo, "\n\n" );

  report = string( "The following information was pulled from the server via a LDAP request:\n", warning );
  security_message( port:port, data:report );
  exit( 0 );
}

exit( 99 );