CVE-2017-17579
📋 TL;DR
CVE-2017-17579 is a critical SQL injection vulnerability in FS Freelancer Clone 1.0 that allows attackers to execute arbitrary SQL commands via the 'u' parameter in profile.php. This affects all installations of FS Freelancer Clone 1.0, potentially compromising the entire database and application.
💻 Affected Systems
- FS Freelancer Clone
📦 What is this software?
Freelancer Clone by Freelancer Clone Project
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data manipulation, authentication bypass, and potential remote code execution via database functions.
Likely Case
Unauthorized data extraction from the database including user credentials, personal information, and business data.
If Mitigated
No impact if proper input validation and parameterized queries are implemented.
🎯 Exploit Status
Multiple public exploit scripts available. Exploitation requires minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
1. Review and modify profile.php to implement parameterized queries
2. Add input validation for the 'u' parameter
3. Consider upgrading to a maintained version if available
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block exploitation attempts.
Input Validation Filter
allAdd server-side validation to restrict the 'u' parameter to expected values only.
// PHP example: if(!is_numeric($_GET['u'])) { die('Invalid input'); }
🧯 If You Can't Patch
- Isolate the application in a segmented network with strict access controls
- Implement database-level protections: use least privilege accounts, enable database auditing
🔍 How to Verify
Check if Vulnerable:
Test profile.php with SQL injection payloads in the 'u' parameter: profile.php?u=1' OR '1'='1Check Version:
Check application files for version information or review installation documentation.Verify Fix Applied:
Attempt SQL injection tests and verify they are blocked or produce expected error handling.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in application logs
- Multiple failed login attempts from single IP
- Requests to profile.php with SQL keywords in parameters
Network Indicators:
- HTTP requests containing SQL injection patterns in URL parameters
- Unusual database query patterns from application server
SIEM Query:
source="web_logs" AND (url="*profile.php*" AND (param="*u=*' OR*" OR param="*u=*' UNION*" OR param="*u=*' SELECT*"))