CVE-2018-13850
📋 TL;DR
This vulnerability allows SQL injection attacks through the username parameter in the Firebase Cloud Messaging admin panel login page on iOS. Attackers can execute arbitrary SQL commands to potentially access or manipulate database contents. This affects iOS applications using the vulnerable Firebase Cloud Messaging component with the advance admin panel.
💻 Affected Systems
- Firebase Cloud Messaging (FCM) + Advance Admin Panel
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise allowing data theft, data manipulation, or complete system takeover through SQL injection leading to remote code execution.
Likely Case
Unauthorized access to sensitive user data stored in the Firebase database, potential authentication bypass, or data corruption.
If Mitigated
Limited impact with proper input validation and parameterized queries preventing SQL injection execution.
🎯 Exploit Status
SQL injection via username parameter in login endpoint makes exploitation straightforward for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 2017-10-26
Vendor Advisory: https://firebase.google.com/support/release-notes/ios
Restart Required: Yes
Instructions:
1. Update Firebase iOS SDK to latest version. 2. Update FCM component specifically. 3. Rebuild and redeploy iOS application. 4. Test push notification functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to reject SQL injection patterns in username parameter
Implement regex filter: ^[a-zA-Z0-9_@.-]+$ for username input
WAF Configuration
allConfigure web application firewall to block SQL injection patterns
ModSecurity rule: SecRule ARGS:username "@detectSQLi" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Disable the advance admin panel feature completely
- Implement network segmentation to isolate the vulnerable component from sensitive databases
🔍 How to Verify
Check if Vulnerable:
Test login endpoint with SQL injection payload in username parameter: /advance_push/public/login?username=admin' OR '1'='1Check Version:
Check Firebase SDK version in iOS project: pod outdated or check Podfile.lockVerify Fix Applied:
Attempt SQL injection after update and verify proper error handling or rejection📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in application logs
- Unusual login attempts with special characters
- Multiple failed login attempts from single IP
Network Indicators:
- HTTP requests with SQL keywords in parameters
- Unusual database query patterns from application server
SIEM Query:
source="app_logs" AND (message="*SQL*" OR message="*syntax*error*") AND uri="/advance_push/public/login"