CVE-2025-1848
📋 TL;DR
This critical vulnerability in zj1983 zz software allows attackers to perform Server-Side Request Forgery (SSRF) attacks by manipulating the 'url' parameter in the /import_data_check endpoint. Attackers can exploit this remotely to make the server send requests to internal systems, potentially accessing sensitive data or services. All users of zj1983 zz up to version 2024-8 are affected.
💻 Affected Systems
- zj1983 zz
📦 What is this software?
Zz by Zframeworks
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access internal services, exfiltrate sensitive data, perform port scanning of internal networks, or chain with other vulnerabilities to achieve remote code execution.
Likely Case
Unauthorized access to internal HTTP services, data exfiltration from internal APIs, or reconnaissance of internal network infrastructure.
If Mitigated
Limited to accessing only allowed external resources if proper input validation and network segmentation are implemented.
🎯 Exploit Status
Exploit details are publicly available on GitHub. Remote exploitation is confirmed. The vendor has not responded to disclosure attempts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any version after 2024-8 if available, or implement workarounds.
🔧 Temporary Workarounds
Input Validation and URL Whitelisting
allImplement strict validation of URL parameters to only allow specific, trusted domains or IP addresses.
Network Segmentation
allRestrict outbound network access from the affected server to only necessary external services.
🧯 If You Can't Patch
- Disable or block access to the /import_data_check endpoint via web application firewall or network controls.
- Implement rate limiting and monitoring for suspicious requests to the vulnerable endpoint.
🔍 How to Verify
Check if Vulnerable:
Test if the /import_data_check endpoint accepts arbitrary URLs by sending a request with a controlled external URL parameter and observing if the server attempts to connect.Check Version:
Check the software version through its interface or configuration files; specific command unknown.Verify Fix Applied:
Verify that URL parameter validation rejects unauthorized domains and that outbound requests are properly restricted.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from the server to internal IPs or unexpected domains
- Multiple requests to /import_data_check with varying URL parameters
Network Indicators:
- Outbound connections from the server to internal network segments on HTTP/HTTPS ports
- Unusual traffic patterns from the server to external services
SIEM Query:
Example: source_ip=[server_ip] AND (url_path="/import_data_check" OR dest_ip IN [internal_ranges])