CVE-2019-8149
📋 TL;DR
This vulnerability allows unauthenticated attackers to append arbitrary session IDs that persist after authentication, potentially hijacking user sessions. It affects Magento 2.2 prior to 2.2.10 and Magento 2.3 prior to 2.3.3 or 2.3.2-p1. This enables unauthorized access to user accounts and administrative functions.
💻 Affected Systems
- Magento Commerce
- Magento Open Source
📦 What is this software?
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
Magento by Magento
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to Magento stores, allowing data theft, code injection, complete site takeover, and potential compromise of customer payment information.
Likely Case
Session hijacking leading to unauthorized access to user accounts, privilege escalation, and manipulation of store data or orders.
If Mitigated
Limited impact with proper session management controls, though authentication bypass remains possible.
🎯 Exploit Status
Exploitation requires minimal technical skill and can be automated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Magento 2.2.10, Magento 2.3.3, or Magento 2.3.2-p1
Vendor Advisory: https://magento.com/security/patches/magento-2.3.3-and-2.2.10-security-update
Restart Required: Yes
Instructions:
1. Backup your Magento installation and database. 2. Update to Magento 2.2.10, 2.3.3, or 2.3.2-p1 via Composer or Magento Marketplace. 3. Clear cache and reindex. 4. Test functionality.
🔧 Temporary Workarounds
Session Validation Enhancement
allImplement custom session validation to check and invalidate suspicious session IDs.
Requires custom PHP development - no single command
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to detect and block session manipulation attempts.
- Monitor authentication logs for unusual session activity and implement rate limiting on authentication endpoints.
🔍 How to Verify
Check if Vulnerable:
Check Magento version via admin panel or run: php bin/magento --versionCheck Version:
php bin/magento --versionVerify Fix Applied:
Confirm version is 2.2.10, 2.3.3, or 2.3.2-p1 or higher. Test session management functionality.📡 Detection & Monitoring
Log Indicators:
- Multiple session creation attempts from single IP
- Session IDs with unusual patterns or lengths
- Authentication failures followed by successful logins with different session IDs
Network Indicators:
- HTTP requests with manipulated session cookies
- Unusual authentication request patterns
SIEM Query:
source="magento_access.log" | search "PHPSESSID" AND ("login" OR "authenticate") | stats count by src_ip, PHPSESSID