CVE-2024-32641
📋 TL;DR
CVE-2024-32641 is a critical remote code execution vulnerability in Masa CMS that allows unauthenticated attackers to execute arbitrary code on affected systems. The vulnerability exists in the addParam function where user-controlled input is improperly evaluated, enabling complete system compromise. All Masa CMS installations running vulnerable versions are affected.
💻 Affected Systems
- Masa CMS
📦 What is this software?
Masacms by Masacms
Masacms by Masacms
Masacms by Masacms
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining full control over the web server, allowing data theft, malware deployment, lateral movement, and persistent backdoor installation.
Likely Case
Attackers deploy web shells, cryptocurrency miners, or ransomware, leading to data breach, service disruption, and potential compliance violations.
If Mitigated
If proper network segmentation and web application firewalls are in place, exploitation attempts may be blocked, limiting impact to the specific application instance.
🎯 Exploit Status
The vulnerability is in a core function and exploitation appears straightforward based on the advisory description.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.2.8, 7.3.13, or 7.4.6
Vendor Advisory: https://github.com/MasaCMS/MasaCMS/security/advisories/GHSA-cj9g-v5mq-qrjm
Restart Required: Yes
Instructions:
1. Backup your Masa CMS installation and database. 2. Download the patched version (7.2.8, 7.3.13, or 7.4.6) from the official repository. 3. Replace the vulnerable files with patched versions. 4. Restart the web server. 5. Verify the patch is applied by checking the version.
🔧 Temporary Workarounds
Web Application Firewall Rule
allBlock requests containing suspicious m tag parameters or criteria parameter patterns
Network Access Control
allRestrict access to Masa CMS administration interfaces to trusted IP addresses only
🧯 If You Can't Patch
- Immediately take the vulnerable system offline until patching is possible
- Implement strict network segmentation and monitor for exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check your Masa CMS version against affected versions (prior to 7.2.8, 7.3.13, and 7.4.6)Check Version:
Check the Masa CMS admin panel or examine the version files in the installation directoryVerify Fix Applied:
Verify the version is 7.2.8, 7.3.13, or 7.4.6 or higher, and test that the addParam function no longer accepts malicious input📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Masa CMS endpoints with criteria parameter
- Suspicious m tag usage in request parameters
- Unexpected process execution from web server context
Network Indicators:
- Outbound connections from web server to unknown IPs
- Unusual traffic patterns to/from Masa CMS instances
SIEM Query:
source="web_server_logs" AND (uri="*masa*" OR uri="*cms*") AND (param="*criteria*" OR param="*m*" OR method="POST") AND status="200"