CVE-2022-47872
📋 TL;DR
This Server-Side Request Forgery (SSRF) vulnerability in maccms10 allows attackers to make the application send arbitrary HTTP requests to internal or external systems by injecting malicious payloads into the Name parameter. Attackers can potentially access internal services, perform port scanning, or interact with cloud metadata services. All users running vulnerable versions of maccms10 are affected.
💻 Affected Systems
- maccms10
📦 What is this software?
Maccms by Maccms
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive internal services, interact with cloud metadata APIs to obtain credentials, perform lateral movement within the network, or use the vulnerable server as a proxy for attacks against other systems.
Likely Case
Attackers would typically scan internal networks, access internal web applications, or interact with cloud metadata services to gather information about the infrastructure.
If Mitigated
With proper network segmentation and egress filtering, the impact would be limited to the local server environment with minimal data exposure.
🎯 Exploit Status
Public proof-of-concept code is available on GitHub, making exploitation straightforward for attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch is available. Consider upgrading to a newer version if available, or implement workarounds and monitoring.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement strict input validation for the Name parameter to reject URLs and special characters
Modify application code to validate Name parameter input
Network Egress Filtering
linuxRestrict outbound connections from the application server to only necessary destinations
iptables -A OUTPUT -p tcp --dport 80 -j DROP
iptables -A OUTPUT -p tcp --dport 443 -j DROP
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block SSRF patterns in requests
- Isolate the vulnerable system in a restricted network segment with limited outbound access
🔍 How to Verify
Check if Vulnerable:
Test by sending a crafted payload to the Interface address module's Name parameter and observing if the server makes external requestsCheck Version:
Check maccms10 version in admin panel or configuration filesVerify Fix Applied:
Test the same payload after implementing fixes to confirm no external requests are made📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from the application server
- Requests to internal IP addresses or cloud metadata endpoints
Network Indicators:
- HTTP traffic from application server to unexpected destinations
- Port scanning patterns originating from the server
SIEM Query:
source_ip="application_server_ip" AND (dest_ip="169.254.169.254" OR dest_port IN (80, 443, 8080))