CVE-2017-15379
📋 TL;DR
This vulnerability allows attackers to bypass authentication in E-Sic 1.0 by using SQL injection in the login form. Attackers can gain unauthorized access to the system by submitting specially crafted username and password values containing SQL injection payloads. Organizations using E-Sic 1.0 software are affected.
💻 Affected Systems
- E-Sic
📦 What is this software?
E Sic by Softwarepublico
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to access all data, modify records, and potentially execute arbitrary code on the server.
Likely Case
Unauthorized access to sensitive citizen data and government records, data manipulation, and privilege escalation.
If Mitigated
Limited impact with proper input validation, parameterized queries, and network segmentation in place.
🎯 Exploit Status
Exploit code is publicly available and requires no authentication. Simple SQL injection payloads like '=''or' can bypass authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: No official vendor advisory found
Restart Required: No
Instructions:
1. Upgrade to a newer version of E-Sic if available. 2. If upgrade not possible, implement input validation and parameterized queries in the login handler. 3. Review and fix SQL injection vulnerabilities in the authentication code.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF to block SQL injection attempts on the login endpoint
Input Validation
allImplement server-side input validation to reject SQL injection patterns in username and password fields
🧯 If You Can't Patch
- Implement network segmentation to isolate the E-Sic system from other critical infrastructure
- Enable detailed logging and monitoring of authentication attempts and implement alerting for failed/suspicious login patterns
🔍 How to Verify
Check if Vulnerable:
Attempt to login with username: '=''or' and password: '=''or' or similar SQL injection payloads. If login succeeds, system is vulnerable.Check Version:
Check E-Sic version through web interface or configuration files. Typically found in about page or admin panel.Verify Fix Applied:
Attempt the same SQL injection payloads after remediation. Login should fail with proper error handling.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts with SQL injection patterns
- Successful logins from unusual IP addresses
- Login attempts containing 'or', '=', ''' characters
Network Indicators:
- HTTP POST requests to /index with SQL injection payloads in parameters
- Unusual traffic patterns to login endpoint
SIEM Query:
source="web_logs" AND (uri_path="/index" OR uri_path="/login") AND (request_body CONTAINS "'=''or'" OR request_body CONTAINS "'or'" OR request_body CONTAINS "'='")