CVE-2023-42283
📋 TL;DR
This is a critical SQL injection vulnerability in Tyk Gateway's API endpoint that allows attackers to execute arbitrary SQL queries without authentication. Attackers can extract, modify, or delete database contents, potentially compromising the entire application. All organizations running vulnerable Tyk Gateway versions are affected.
💻 Affected Systems
- Tyk Gateway
📦 What is this software?
Tyk by Tyk
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including sensitive data exfiltration, credential theft, data destruction, and potential lateral movement to other systems.
Likely Case
Data exfiltration from the Tyk database including API keys, user information, and configuration data leading to API abuse and system compromise.
If Mitigated
Limited impact due to network segmentation, database permissions restrictions, and input validation preventing successful exploitation.
🎯 Exploit Status
Public proof-of-concept exists on GitHub. Exploitation requires sending crafted requests to the vulnerable endpoint but doesn't require authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 5.0.4 or later
Vendor Advisory: https://tyk.io/docs/security/
Restart Required: Yes
Instructions:
1. Backup current configuration and data. 2. Stop Tyk Gateway service. 3. Update to Tyk Gateway 5.0.4 or later using package manager or manual installation. 4. Restart Tyk Gateway service. 5. Verify functionality.
🔧 Temporary Workarounds
Input Validation WAF Rule
allImplement Web Application Firewall rules to block SQL injection patterns in api_id parameter
# Example ModSecurity rule: SecRule ARGS:api_id "@detectSQLi" "id:1001,phase:2,deny,status:403"
API Endpoint Restriction
linuxRestrict access to the vulnerable API endpoint using network ACLs or reverse proxy rules
# nginx example: location ~* /api/ { deny all; }
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries at application layer
- Deploy network segmentation to isolate Tyk Gateway from critical databases and systems
🔍 How to Verify
Check if Vulnerable:
Check if running Tyk Gateway version 5.0.3. Attempt to send SQL injection payload to api_id parameter and observe database errors or time delays.Check Version:
tyk --versionVerify Fix Applied:
Verify Tyk Gateway version is 5.0.4 or later. Test SQL injection attempts should return proper error handling without database interaction.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in logs
- Multiple failed API requests with SQL-like patterns
- High volume of requests to specific API endpoints
Network Indicators:
- SQL keywords in HTTP parameters (UNION, SELECT, etc.)
- Unusual database connection patterns from Tyk Gateway
SIEM Query:
source="tyk-gateway" AND (message="*sql*" OR message="*database*" OR message="*injection*")