CVE-2024-22889
📋 TL;DR
CVE-2024-22889 is an access control vulnerability in Plone v6.0.9 that allows remote attackers to view and list all files hosted on the website via crafted requests. This affects all Plone v6.0.9 installations with default configurations, potentially exposing sensitive files to unauthorized users.
💻 Affected Systems
- Plone
📦 What is this software?
Plone by Plone
⚠️ Risk & Real-World Impact
Worst Case
Complete exposure of all website files including sensitive configuration files, user data, and private content, leading to data breaches and potential credential theft.
Likely Case
Unauthorized access to file listings and content, enabling reconnaissance and data exfiltration of publicly accessible files.
If Mitigated
Limited exposure of non-sensitive files if proper access controls and file permissions are already configured.
🎯 Exploit Status
Public proof-of-concept available on GitHub; exploitation requires only crafted HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v6.0.10 or later
Vendor Advisory: https://plone.org/security/advisories
Restart Required: Yes
Instructions:
1. Backup your Plone instance. 2. Update Plone to v6.0.10 or later using pip: 'pip install --upgrade Plone'. 3. Restart the Plone service. 4. Verify the update with 'bin/instance debug' and check version.
🔧 Temporary Workarounds
Access Control Configuration
allImplement strict access control rules to restrict file listing and viewing permissions.
Configure via Plone control panel: Security -> Sharing -> Set appropriate permissions
Web Application Firewall Rules
allBlock requests attempting to list or access files via suspicious patterns.
Add WAF rule: Block requests containing '/@@file-listing' or similar patterns
🧯 If You Can't Patch
- Implement network segmentation to isolate Plone instances from untrusted networks.
- Deploy a reverse proxy with strict URL filtering to block file listing endpoints.
🔍 How to Verify
Check if Vulnerable:
Test by sending a crafted request to the file listing endpoint (e.g., GET /@@file-listing) and check if unauthorized file listings are returned.Check Version:
bin/instance debug then check Plone version in outputVerify Fix Applied:
After patching, attempt the same crafted request; it should return an access denied error or no file listings.📡 Detection & Monitoring
Log Indicators:
- HTTP 200 responses to file listing endpoints from unauthorized IPs
- Unusual GET requests to '/@@file-listing' or similar paths
Network Indicators:
- Spike in requests to file listing endpoints
- Outbound data transfers of file contents
SIEM Query:
source="plone.log" AND (uri_path="/@@file-listing" OR uri_path="/@@view") AND http_status=200