IIS Metabase

# SPDX-FileCopyrightText: 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("1.3.6.1.4.1.25623.1.0.96009");
  script_version("2025-04-16T05:39:43+0000");
  script_tag(name:"last_modification", value:"2025-04-16 05:39:43 +0000 (Wed, 16 Apr 2025)");
  script_tag(name:"creation_date", value:"2009-10-23 12:32:24 +0200 (Fri, 23 Oct 2009)");
  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:"registry");
  script_name("IIS Metabase");
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2009 Greenbone AG");
  script_family("IT-Grundschutz");
  script_mandatory_keys("Compliance/Launch/GSHB");
  script_dependencies("smb_reg_service_pack.nasl", "GSHB/GSHB_WMI_OSInfo.nasl");

  script_tag(name:"summary", value:"Check the IIS Metabase for AspEnableParentPaths

  This script reads the IIS Metabase and gets the AspEnableParentPaths configuration.");

  exit(0);
}

include("smb_nt.inc");
include("secpod_smb_func.inc");

windirpath = get_kb_item("WMI/WMI_OSWINDIR");

if(!windirpath || "error" >< windirpath || "none" >< windirpath){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  set_kb_item(name:"GSHB/AspEnableParentPaths/log", value:"No access to SMB host.\nFirewall is activated or there is not a Windows system.");
  exit(0);
}

val01 = split(windirpath, sep:":", keep:FALSE);
win_dir = val01[1];
win_dir = ereg_replace(pattern:'\\\\', replace:'', string:win_dir);
share = val01[0] + "$";

file = "\" + win_dir + "\system32\inetsrv\metabase.xml";

name = kb_smb_name();
domain = kb_smb_domain();
login = kb_smb_login();
pass = kb_smb_password();
port = kb_smb_transport();

size = get_file_size(share:share, file:file);
if (!size){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"off");
  log_message(port:0, proto:"IT-Grundschutz", data:"IIS Metabase file not found.");
  exit(0);
}

soc = open_sock_tcp(port);
if(!soc){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Can't open socket to Host");
  exit(0);
}

r = smb_session_request(soc:soc, remote:name);
if(!r){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Cannot pre-establish an SMB Session with the remote Host.");
  close(soc);
  exit(0);
}

prot = smb_neg_prot(soc:soc);
if(!prot){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Cannot negotiate the protocol");
  close(soc);
  exit(0);
}

if(!get_kb_item("login/SMB/kerberos/success")) {
  r = smb_session_setup(soc:soc, login:login, password:pass, domain:domain, prot:prot);
  if(!r) {
    set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
    log_message(port:0, proto:"IT-Grundschutz", data:"Cannot setup a SMB session to the remote Host");
    close(soc);
    exit(0);
  }
} else {
  kdc = kb_smb_kdc();
  host = kb_smb_hostname();

  if (kdc && host && defined_func('krb5_gss_init')) {

    r = krb5_gss_init();

    context = krb5_gss_prepare_context(kdc:kdc, realm:domain, host:host, service:"cifs", user:login, password:pass);

    if (krb5_is_failure(context)) {
      set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
      log_message(port:0, proto:"IT-Grundschutz", data:"Cannot setup a SMB session to the remote Host as Kerberos authentication failed");
      close(soc);
      exit(0);
    }
    r = krb5_gss_update_context();

    if (krb5_is_failure(r)) {
      set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
      log_message(port:0, proto:"IT-Grundschutz", data:"Cannot setup a SMB session to the remote Host as Kerberos authentication failed");
      close(soc);
      exit(0);
    }

    krb5_blob = krb5_gss_update_context_out();
  } else {
    set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
    log_message(port:0, proto:"IT-Grundschutz", data:"Cannot setup a SMB session to the remote Host as Kerberos authentication failed");
    close(soc);
    exit(0);
  }

  r = smb_session_setup(soc:soc, login:login, password:pass, domain:domain, prot:prot, kerberos:krb5_blob);
  if(!r) {
    set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
    log_message(port:0, proto:"IT-Grundschutz", data:"Cannot setup a SMB session to the remote Host");
    close(soc);
    exit(0);
  }
}

if(!r){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Cannot setup a SMB session to the remote Host");
  close(soc);
  exit(0);
}

uid = session_extract_uid(reply:r);
if(!uid){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Cannot extract UID from response");
  close(soc);
  exit(0);
}

r = smb_tconx(soc:soc, name:name, uid:uid, share:share);
if(!r){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Cannot extract data from response");
  close(soc);
  exit(0);
}

tid = tconx_extract_tid(reply:r);
if(!tid){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Can't find Tree ID(tid)");
  close(soc);
  exit(0);
}

r = secure_dialect_negotiation( uid:uid, tid:tid, soc:soc );
if(!r) {
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Cannot complete the secure dialect negotiation.");
  close(soc);
  exit(0);
}

fid = OpenAndX(socket:soc, uid:uid, tid:tid, file:file);
if(!fid){
  set_kb_item(name:"GSHB/AspEnableParentPaths", value:"error");
  log_message(port:0, proto:"IT-Grundschutz", data:"Can't find File ID (fid)");
  close(soc);
  exit(0);
}

metabase = ReadAndX(socket:soc, uid:uid, tid:tid, fid:fid,
                    count:size, off:0);
if (!metabase){
  AspEnableParentPaths = "error";
  log_message(port:port, data:"Cannot access/open the IIS Metabase file.");
} else if(egrep(pattern:"AspEnableParentPaths=.TRUE.", string:metabase)){
  AspEnableParentPaths = "on";
} else {
  AspEnableParentPaths = "off";
}
if (!AspEnableParentPaths || AspEnableParentPaths == "")
  AspEnableParentPaths = "none";

set_kb_item(name:"GSHB/AspEnableParentPaths", value:AspEnableParentPaths);
close(soc);
exit(0);