IT-Grundschutz: List reject Rule on Cisco Voip Devices over Telnet

# SPDX-FileCopyrightText: 2010 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("1.3.6.1.4.1.25623.1.0.96107");
  script_version("2025-01-22T05:38:11+0000");
  script_tag(name:"last_modification", value:"2025-01-22 05:38:11 +0000 (Wed, 22 Jan 2025)");
  script_tag(name:"creation_date", value:"2010-06-10 15:20:25 +0200 (Thu, 10 Jun 2010)");
  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_app");
  script_name("IT-Grundschutz: List reject Rule on Cisco Voip Devices over Telnet");
  script_add_preference(name:"Telnet Testuser Name", type:"entry", value:"UserName", id:1);
  script_add_preference(name:"Telnet Testuser Password", type:"password", value:"PassWord", id:2);
  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (C) 2010 Greenbone AG");
  script_family("IT-Grundschutz");
  script_mandatory_keys("Compliance/Launch/GSHB");
  script_dependencies("compliance_tests.nasl", "find_service.nasl", "ssh_authorization.nasl");

  script_tag(name:"summary", value:"This plugin list reject Rule on Cisco Voip Devices over Telnet.
  To use this test, you must configure Username and password for this test in the preferences.");

  exit(0);
}

include("telnet_func.inc");
include("default_account.inc");
include("port_service_func.inc");

telnet_port = service_get_port(default:23, proto:"telnet");

login = script_get_preference("Telnet Testuser Name");
password = script_get_preference("Telnet Testuser Password");

if (!login || login == "UserName" || login == "" || !password || password == "PassWord" || password == ""){
  set_kb_item(name: "GSHB/Voice", value:"no credentials set");
  exit(0);
}

soc = open_sock_tcp(telnet_port);
if (!soc) {
  telnet_port = 0;
  set_kb_item(name: "GSHB/Voice", value:"error");
  set_kb_item(name: "GSHB/Voice/log", value:"no Telnet Port");
  exit(0);
}
ret = telnet_negotiate(socket:soc, pattern:"(ogin:|asscode:|assword:)");
if (strlen(ret)){
  if (stridx(ret, "sername:") != -1 || stridx(ret, "ogin:") != -1) {
    send(socket:soc, data:string(login, "\r\n"));
    ret = recv_until(socket:soc, pattern:"(assword:|asscode:)");
  }
  if (stridx(ret, "assword:") == -1 && stridx(ret, "asscode:") == -1) {
    close(soc);
    return(0);
  }
  send(socket:soc, data:string(password, "\r\n"));
  r = recv(socket:soc, length:4096);
  send(socket:soc, data:string("term len 0\r\n"));
  r2 = recv_until(socket:soc, pattern:"(assword:|asscode:|ogin:|% Bad password)");
  if (!r2){
    send(socket:soc, data:string('\r\nshow version  | include Cisco\r\n'));
    cisco = recv(socket:soc, length:16384);
    send(socket:soc, data:string('\r\nshow version  | include oice\r\n'));
    voice = recv(socket:soc, length:16384);
    send(socket:soc, data:string('\r\nshow running-config | include (R|r)ule .* (R|r)eject\r\n'));
    transla = recv(socket:soc, length:16384);
#    send(socket:soc, data:string('\r\nshow running-config  | include acl\r\n'));
#    acl = recv(socket:soc, length:16384);
  }else{
    set_kb_item(name: "GSHB/Voice", value:"Login Failed");
    close(soc);
    exit(0);
  }
  close(soc);
}

val = split(cisco, sep:'\r\n', keep:0);
for(i=0; i<max_index(val); i++){
  if (val[i] == "" || val[i] =~ ".*#$" || val[i] == "show version" || val[i] =~ ".*#show version") continue;
  retcisco += val[i] + '\n';
}

val = split(voice, sep:'\r\n', keep:0);
for(i=0; i<max_index(val); i++){
  if (val[i] == "" || val[i] =~ ".*#$" || val[i] == "show version  | include oice" || val[i] =~ ".*#show version  | include oice") continue;
  retvoice += val[i] + '\n';
}

val = split(transla, sep:'\r\n', keep:0);
for(i=0; i<max_index(val); i++){
  if (val[i] == "" || val[i] =~ ".*#$" || val[i] == "show running-config | include (R|r)ule .* (R|r)eject" || val[i] =~ ".*#show running-config | include (R|r)ule .* (R|r)eject") continue;
  rettransla += val[i] + '\n';
}

#val = split(acl, sep:'\r\n', keep:0);
#for(i=0; i<max_index(val); i++){
#  if (val[i] == "" || val[i] =~ ".*#$" || val[i] == "show running-config  | include acl" || val[i] =~ ".*#show running-config  | include acl") continue;
#  retacl += val[i] + '\n';
#}

if (!retvoice){
  set_kb_item(name: "GSHB/Voice", value:"novoice");
exit(0);
}else if("show: command not found" >< voice){
  set_kb_item(name: "GSHB/Voice", value:"nocisco");
exit(0);
}else if(!retcisco){
  set_kb_item(name: "GSHB/Voice", value:"nocisco");
exit(0);
}else{
  if (!rettransla) rettransla = "noconfig";
  if (!retacl) retacl = "noconfig";
}

set_kb_item(name: "GSHB/Voice", value:"Cisco-Voice");
set_kb_item(name: "GSHB/Voice/translation", value:rettransla);
#set_kb_item(name: "GSHB/Voice/acl", value:retacl);
exit(0);