CVE-2022-25838
📋 TL;DR
Laravel Fortify before version 1.11.1 has a TOTP (Time-based One-Time Password) vulnerability where one-time codes can be reused within a short time window. This breaks the fundamental security property of TOTP authentication, potentially allowing attackers to bypass two-factor authentication. Any Laravel application using Fortify for 2FA with affected versions is vulnerable.
💻 Affected Systems
- Laravel Fortify
📦 What is this software?
Fortify by Laravel
⚠️ Risk & Real-World Impact
Worst Case
Attackers can bypass two-factor authentication entirely, gaining unauthorized access to user accounts even with correct passwords, potentially leading to complete account takeover and data compromise.
Likely Case
Attackers who intercept or guess a valid TOTP code can reuse it to bypass 2FA for targeted accounts, compromising user sessions and potentially accessing sensitive application data.
If Mitigated
With proper network segmentation and monitoring, impact is limited to specific user accounts rather than system-wide compromise, but authentication integrity remains weakened.
🎯 Exploit Status
Exploitation requires valid user credentials first, then reuse of a recently used TOTP code. The vulnerability is well-documented in public GitHub issues.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.11.1
Vendor Advisory: https://github.com/laravel/fortify/issues/201
Restart Required: No
Instructions:
1. Update Laravel Fortify to version 1.11.1 or later using Composer: composer require laravel/fortify:^1.11.1
2. Run composer update
3. Clear Laravel cache: php artisan cache:clear
4. Test TOTP authentication functionality
🔧 Temporary Workarounds
Disable TOTP 2FA temporarily
allTemporarily disable TOTP-based two-factor authentication until patching is complete
Modify Fortify configuration to disable 2FA features
🧯 If You Can't Patch
- Implement additional authentication layers such as IP whitelisting or device fingerprinting
- Increase monitoring of authentication logs for suspicious TOTP reuse patterns
🔍 How to Verify
Check if Vulnerable:
Check composer.json or run: composer show laravel/fortify | grep versionCheck Version:
composer show laravel/fortify | grep versionVerify Fix Applied:
Confirm version is 1.11.1 or higher: composer show laravel/fortify📡 Detection & Monitoring
Log Indicators:
- Multiple successful authentications with same TOTP code within short time window
- Unusual authentication patterns from same user
Network Indicators:
- Repeated authentication attempts with same credentials+TOTP combination
SIEM Query:
source="laravel.log" AND "authenticated" AND "two_factor" AND time_diff < 30s