CVE-2024-7740
📋 TL;DR
This critical vulnerability in wanglongcn ltcms 1.0.20 allows attackers to perform server-side request forgery (SSRF) through the /api/test/download endpoint. Attackers can manipulate the 'url' parameter to make the server send requests to internal systems, potentially accessing sensitive data or services. Organizations using ltcms 1.0.20 are affected.
💻 Affected Systems
- wanglongcn ltcms
📦 What is this software?
Ltcms by Ltcms
⚠️ 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
Attackers will use SSRF to access internal APIs, cloud metadata services, or internal administrative interfaces to steal credentials and sensitive data.
If Mitigated
With proper network segmentation and egress filtering, impact is limited to information disclosure from accessible internal services.
🎯 Exploit Status
Exploit code is publicly available on GitHub, making this easy to weaponize. The vulnerability requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: unknown
Vendor Advisory: none
Restart Required: No
Instructions:
No official patch available. Vendor was contacted but did not respond. Consider upgrading to a different CMS if available.
🔧 Temporary Workarounds
Block vulnerable endpoint
allUse web server configuration to block access to /api/test/download endpoint
# For Apache: RewriteRule ^/api/test/download - [F]
# For Nginx: location /api/test/download { deny all; }
Input validation filter
allImplement input validation to restrict URL parameter to allowed domains only
🧯 If You Can't Patch
- Implement strict network egress filtering to limit what internal services the server can access
- Deploy a web application firewall (WAF) with SSRF protection rules
🔍 How to Verify
Check if Vulnerable:
Check if /api/test/download endpoint exists and accepts 'url' parameter. Test with controlled external service to confirm SSRF.Check Version:
Check CMS version in admin panel or configuration filesVerify Fix Applied:
Verify /api/test/download endpoint is blocked or returns error when accessed. Test SSRF attempts fail.📡 Detection & Monitoring
Log Indicators:
- Unusual requests to /api/test/download with external URLs
- Outbound requests from server to unexpected internal IPs
Network Indicators:
- Server making requests to internal services not normally accessed
- Port scanning patterns from server IP
SIEM Query:
source_ip=webserver AND (uri_path="/api/test/download" OR dest_ip IN internal_subnets)