CVE-2024-36190
📋 TL;DR
This DOM-based Cross-Site Scripting vulnerability in Adobe Experience Manager allows attackers to execute malicious JavaScript in victims' browsers when they interact with specially crafted content. It affects AEM versions 6.5.20 and earlier. Attackers could potentially steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals administrator session cookies, gains full control of AEM instance, and potentially accesses sensitive content or deploys additional malware.
Likely Case
Attacker steals user session cookies to impersonate legitimate users, potentially accessing unauthorized content or performing limited administrative actions.
If Mitigated
With proper input validation and output encoding, the attack fails to execute, resulting in no impact beyond failed exploitation attempts.
🎯 Exploit Status
Requires user interaction (clicking malicious link or submitting form). No public exploit code available as of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.21 or later
Vendor Advisory: https://helpx.adobe.com/security/products/experience-manager/apsb24-28.html
Restart Required: Yes
Instructions:
1. Download AEM 6.5.21 or later from Adobe distribution portal. 2. Backup current instance. 3. Apply the update following Adobe's upgrade documentation. 4. Restart AEM services. 5. Verify successful update.
🔧 Temporary Workarounds
Content Security Policy Implementation
allImplement strict CSP headers to restrict script execution from untrusted sources
Add 'Content-Security-Policy: script-src 'self'' to web server configuration
Input Validation Filter
allDeploy custom servlet filter to sanitize user inputs before processing
Implement javax.servlet.Filter to validate and sanitize all user inputs
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) with XSS protection rules
- Disable or restrict user-submitted content features in AEM
🔍 How to Verify
Check if Vulnerable:
Check AEM version via AEM Web Console (/system/console/bundles) or CRXDE Lite. If version is 6.5.20 or earlier, system is vulnerable.Check Version:
curl -s http://localhost:4502/system/console/bundles | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify AEM version is 6.5.21 or later. Test XSS payloads in user input fields to confirm they are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in request logs
- Multiple failed XSS attempts in access logs
- Suspicious user agent strings containing script tags
Network Indicators:
- HTTP requests containing script tags or JavaScript events in parameters
- Unusual redirect patterns from AEM instance
SIEM Query:
source="aem_access.log" AND ("<script>" OR "javascript:" OR "onclick=" OR "onload=")