CVE-2015-5376
📋 TL;DR
This is an unauthenticated SQL injection vulnerability in GSI WiNPAT Portal's login form that allows remote attackers to execute arbitrary SQL commands via the username field. Attackers can potentially gain full control of the database and underlying system. Organizations running affected versions of GSI WiNPAT Portal are vulnerable.
💻 Affected Systems
- GSI WiNPAT Portal
📦 What is this software?
Winpat Portal by Gsi Office
Winpat Portal by Gsi Office
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise including database takeover, credential theft, data exfiltration, and potential lateral movement to other systems
Likely Case
Database compromise leading to data theft, privilege escalation, and potential remote code execution
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation in place
🎯 Exploit Status
Public exploit code is available and exploitation requires no authentication, making this trivial to exploit
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 3.6.1.0
Vendor Advisory: Not publicly documented
Restart Required: Yes
Instructions:
1. Contact GSI for the latest patched version. 2. Backup current configuration and data. 3. Install the updated version. 4. Restart the WiNPAT Portal service. 5. Verify the fix by testing the login form.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block malicious payloads
Network Segmentation
allRestrict access to the WiNPAT Portal to only trusted networks and IP addresses
🧯 If You Can't Patch
- Implement strong network access controls to limit who can reach the WiNPAT Portal
- Deploy an intrusion prevention system (IPS) with SQL injection detection rules
🔍 How to Verify
Check if Vulnerable:
Test the login form with SQL injection payloads like ' OR '1'='1 in the username field and observe if authentication bypass occursCheck Version:
Check the WiNPAT Portal version in the application interface or configuration filesVerify Fix Applied:
Attempt the same SQL injection payloads after patching; they should be rejected or properly escaped📡 Detection & Monitoring
Log Indicators:
- Unusual SQL syntax in login attempts
- Multiple failed login attempts with SQL-like patterns
- Successful logins from unusual IP addresses
Network Indicators:
- SQL keywords in HTTP POST requests to login endpoint
- Unusual database connection patterns
SIEM Query:
source="winpat_logs" AND (message="*' OR*" OR message="*UNION*" OR message="*SELECT*" OR message="*--*" OR message="*;*" OR message="*/*")