CVE-2024-13237
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in Drupal's File Entity module that allows attackers to inject malicious scripts into web pages. It affects Drupal 7 sites using the File Entity module, potentially compromising user sessions and data. The vulnerability occurs when user input isn't properly sanitized during web page generation.
💻 Affected Systems
- Drupal File Entity (fieldable files) module
📦 What is this software?
File Entity by File Entity Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, take over administrative accounts, deface websites, or redirect users to malicious sites, potentially leading to complete site compromise.
Likely Case
Attackers steal user session cookies or credentials, perform actions on behalf of authenticated users, or deface portions of the website accessible through the vulnerable component.
If Mitigated
With proper input validation and output encoding, the attack surface is minimized, though the vulnerability still exists in the codebase.
🎯 Exploit Status
XSS vulnerabilities typically have low exploitation complexity. The advisory doesn't specify authentication requirements, but XSS often requires some user interaction.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.X-2.38
Vendor Advisory: https://www.drupal.org/sa-contrib-2024-001
Restart Required: No
Instructions:
1. Update the File Entity module to version 7.X-2.38 or later. 2. Navigate to Drupal admin panel. 3. Go to Extend > Update. 4. Follow update instructions or manually download and replace the module files.
🔧 Temporary Workarounds
Input Validation Filter
allImplement custom input validation for file entity fields to sanitize user input
Implement custom validation in Drupal hook_form_alter() or custom module
Content Security Policy
allImplement CSP headers to restrict script execution sources
Add 'Content-Security-Policy' header via .htaccess or web server config
🧯 If You Can't Patch
- Disable the File Entity module if not essential for site functionality
- Implement web application firewall (WAF) rules to detect and block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check Drupal admin panel at Reports > Available updates or check the module version in /modules/file_entity/file_entity.infoCheck Version:
grep 'version' /path/to/drupal/modules/file_entity/file_entity.infoVerify Fix Applied:
Verify module version is 7.X-2.38 or later in the module information file📡 Detection & Monitoring
Log Indicators:
- Unusual file upload patterns
- Suspicious script tags in file metadata or content
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Requests containing script tags or JavaScript in file-related parameters
- Unusual outbound connections from user browsers after visiting file pages
SIEM Query:
web_requests WHERE (url CONTAINS '/file/' OR url CONTAINS '/files/') AND (params CONTAINS '<script' OR params CONTAINS 'javascript:' OR params CONTAINS 'onload=' OR params CONTAINS 'onerror=')