CVE-2024-40347
📋 TL;DR
This reflected cross-site scripting (XSS) vulnerability in Hyland Alfresco Platform allows attackers to inject malicious scripts via the htmlid parameter. When exploited, it enables arbitrary code execution in users' browsers, potentially compromising their sessions and data. Organizations running affected Alfresco versions are at risk.
💻 Affected Systems
- Hyland Alfresco Platform
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator credentials, hijack user sessions, deface the application, or redirect users to malicious sites, leading to full system compromise.
Likely Case
Attackers steal user session cookies and authentication tokens, enabling unauthorized access to sensitive documents and system functions.
If Mitigated
With proper input validation and output encoding, the attack is prevented, though the vulnerable parameter remains present.
🎯 Exploit Status
Proof-of-concept details are publicly available in GitHub repositories, making exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
Check Hyland's official security advisories for patch availability. If a patch is released, apply it following vendor instructions, typically involving updating to a newer version.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side validation to sanitize the htmlid parameter, rejecting or encoding malicious input.
Configure web application firewall (WAF) rules to block XSS payloads in the htmlid parameter.
Content Security Policy (CSP)
allDeploy a strict CSP to mitigate the impact of XSS by restricting script execution sources.
Add CSP header: Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Restrict access to the Alfresco application using network segmentation or firewall rules to limit exposure.
- Monitor and audit logs for suspicious activity related to the htmlid parameter and XSS attempts.
🔍 How to Verify
Check if Vulnerable:
Test by injecting a simple XSS payload (e.g., <script>alert('test')</script>) into the htmlid parameter and check if it executes in the browser.Check Version:
Check the Alfresco version via the admin console or by inspecting application files for version identifiers.Verify Fix Applied:
After applying mitigations, retest with the same payload to ensure it is blocked or sanitized without execution.📡 Detection & Monitoring
Log Indicators:
- Log entries showing malicious strings in the htmlid parameter, such as script tags or JavaScript code.
Network Indicators:
- HTTP requests containing suspicious payloads in the htmlid parameter, detected by WAF or IDS/IPS.
SIEM Query:
Example: source="alfresco" AND (htmlid CONTAINS "<script>" OR htmlid CONTAINS "javascript:")