CVE-2024-57451
📋 TL;DR
ChestnutCMS versions 1.5.0 and earlier contain a directory traversal vulnerability in the FileController component that allows attackers to access arbitrary directories on the server. This affects all deployments of vulnerable ChestnutCMS versions. Attackers can potentially view sensitive files and directory contents.
💻 Affected Systems
- ChestnutCMS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain access to sensitive configuration files, credentials, or source code, leading to complete system compromise or data exfiltration.
Likely Case
Attackers enumerate directory structures and access files containing sensitive information like configuration files, logs, or backup files.
If Mitigated
Limited exposure of non-critical directory contents with proper file permissions and web server restrictions in place.
🎯 Exploit Status
Exploitation requires understanding of directory traversal techniques but no authentication is needed to access the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: > 1.5.0
Vendor Advisory: https://locrian-lightning-dc7.notion.site/Directory-traversal-1628e5e2b1a280fdb463c2235acc7f75
Restart Required: No
Instructions:
1. Upgrade ChestnutCMS to version newer than 1.5.0. 2. Verify the patch has been applied by checking the FileController component. 3. Test directory traversal attempts are properly blocked.
🔧 Temporary Workarounds
Web Server Path Restriction
allConfigure web server to restrict access to parent directories and implement input validation for file paths.
🧯 If You Can't Patch
- Implement strict input validation to reject directory traversal sequences in file path parameters
- Configure web application firewall (WAF) rules to block directory traversal patterns
🔍 How to Verify
Check if Vulnerable:
Attempt to access the vulnerable endpoint with directory traversal payloads like '../../etc/passwd' and check if restricted files are returned.Check Version:
Check ChestnutCMS version in admin panel or configuration filesVerify Fix Applied:
Test the same directory traversal attempts after patching to confirm they are properly blocked or return error messages.📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing '../' sequences to FileController endpoints
- Unusual file access patterns from single IP addresses
Network Indicators:
- HTTP requests with path traversal payloads in URL parameters
SIEM Query:
source="web_logs" AND (uri="*../*" OR params="*../*") AND uri="*FileController*"