CVE-2023-50692
📋 TL;DR
This vulnerability allows remote attackers to upload malicious files to JIZHICMS v2.5 through the download_url parameter, potentially leading to arbitrary code execution. Any organization running the affected version of JIZHICMS is vulnerable to this attack.
💻 Affected Systems
- JIZHICMS
📦 What is this software?
Jizhicms by Jizhicms
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the web server, data exfiltration, and lateral movement to other systems.
Likely Case
Webshell deployment leading to data theft, defacement, or use as a foothold for further attacks.
If Mitigated
File upload blocked or sanitized, preventing malicious file execution while maintaining normal functionality.
🎯 Exploit Status
The GitHub issue shows exploitation details and the vulnerability is straightforward to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
Check GitHub repository for updates or community patches. Consider upgrading to a newer version if available.
🔧 Temporary Workarounds
Restrict file uploads in download_url parameter
allImplement input validation to block file uploads through the vulnerable parameter
Modify app/admin/exts/ controller to validate file types and extensions
Disable vulnerable endpoint
allTemporarily disable or restrict access to the affected download_url functionality
Add access control or disable the specific route in routing configuration
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block file uploads to the vulnerable endpoint
- Restrict network access to JIZHICMS admin interface and monitor for suspicious file uploads
🔍 How to Verify
Check if Vulnerable:
Check if running JIZHICMS v2.5 and test file upload via download_url parameter in app/admin/exts/Check Version:
Check JIZHICMS version in configuration files or admin panelVerify Fix Applied:
Test file upload attempts are blocked or properly validated after implementing controls📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to app/admin/exts/ directory
- Execution of unexpected files from upload directory
Network Indicators:
- HTTP POST requests to download_url parameter with file uploads
- Subsequent connections to uploaded malicious files
SIEM Query:
source="web_logs" AND (uri="/app/admin/exts/" AND method="POST" AND file_upload="true")