CVE-2017-15962
📋 TL;DR
CVE-2017-15962 is an arbitrary file upload vulnerability in iStock Management System 1.0 that allows attackers to upload malicious files via the user/profile endpoint. This affects all organizations using iStock Management System 1.0, potentially leading to complete system compromise.
💻 Affected Systems
- iStock Management System
📦 What is this software?
Istock Management System by Istock Management System Project
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with remote code execution, data theft, and lateral movement across the network.
Likely Case
Webshell deployment leading to server compromise, data exfiltration, and potential ransomware deployment.
If Mitigated
File upload blocked or properly validated, preventing malicious file execution.
🎯 Exploit Status
Multiple public exploits available; trivial to exploit with basic web knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: None
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch exists. Upgrade to a newer version if available, or implement workarounds.
🔧 Temporary Workarounds
File Upload Restriction
allImplement strict file type validation and whitelist allowed extensions
Modify PHP code to validate file extensions and MIME types before upload
Web Application Firewall Rules
allBlock file uploads to /user/profile endpoint or restrict to specific file types
WAF configuration depends on specific product (ModSecurity, Cloudflare, etc.)
🧯 If You Can't Patch
- Disable file upload functionality entirely in the user/profile module
- Implement network segmentation to isolate the vulnerable system from critical assets
🔍 How to Verify
Check if Vulnerable:
Attempt to upload a file with malicious extension (e.g., .php, .jsp) to /user/profile endpointCheck Version:
Check system version in admin panel or configuration filesVerify Fix Applied:
Test that only allowed file types can be uploaded and malicious files are rejected📡 Detection & Monitoring
Log Indicators:
- File upload attempts to /user/profile with unusual extensions
- Successful uploads of executable files
Network Indicators:
- POST requests to /user/profile with file uploads
- Subsequent requests to uploaded malicious files
SIEM Query:
web.url:*user/profile* AND (web.method:POST OR web.file_extension:php)