CVE-2023-49589
📋 TL;DR
This vulnerability allows attackers to reset arbitrary user passwords in WWBN AVideo by exploiting insufficient entropy in password recovery token generation. Attackers can send crafted HTTP requests to the userRecoverPass.php endpoint to take over user accounts. All WWBN AVideo installations using the affected commit are vulnerable.
💻 Affected Systems
- WWBN AVideo
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all user accounts, including administrative accounts, leading to full system takeover, data theft, and potential ransomware deployment.
Likely Case
Attackers reset passwords for high-value accounts (admins, content creators) to gain unauthorized access, modify content, steal sensitive data, or deploy malware.
If Mitigated
With proper network segmentation and monitoring, impact is limited to password resets that can be detected and remediated before account misuse occurs.
🎯 Exploit Status
Exploitation requires sending crafted HTTP requests to the vulnerable endpoint, which is straightforward for attackers with basic web testing tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check WWBN AVideo GitHub repository for updates after commit 15fed957fb
Vendor Advisory: https://github.com/WWBN/AVideo
Restart Required: No
Instructions:
1. Update WWBN AVideo to the latest version from the official GitHub repository. 2. Verify the userRecoverPass.php file has been patched with proper entropy for token generation. 3. Test password recovery functionality.
🔧 Temporary Workarounds
Disable Password Recovery Endpoint
linuxTemporarily disable the vulnerable userRecoverPass.php endpoint to prevent exploitation
mv /path/to/avideo/userRecoverPass.php /path/to/avideo/userRecoverPass.php.disabled
Web Server Blocking
allConfigure web server to block access to userRecoverPass.php
# For Apache: add 'Deny from all' to .htaccess for userRecoverPass.php
# For Nginx: add 'location ~ userRecoverPass\.php { deny all; }' to site config
🧯 If You Can't Patch
- Implement network-level restrictions to limit access to the userRecoverPass.php endpoint to trusted IP addresses only.
- Enable detailed logging for all password recovery attempts and monitor for suspicious patterns.
🔍 How to Verify
Check if Vulnerable:
Check if your WWBN AVideo installation includes commit 15fed957fb in the git history or if userRecoverPass.php lacks proper random token generation.Check Version:
cd /path/to/avideo && git log --oneline | grep 15fed957fbVerify Fix Applied:
Verify the updated userRecoverPass.php uses cryptographically secure random functions for token generation and test password recovery functionality.📡 Detection & Monitoring
Log Indicators:
- Multiple failed password recovery attempts from single IP
- Successful password recovery for multiple users from same source
- Unusual patterns in userRecoverPass.php access logs
Network Indicators:
- HTTP POST requests to /userRecoverPass.php with unusual parameters
- Rapid sequential requests to password recovery endpoint
SIEM Query:
source="web_logs" AND uri="/userRecoverPass.php" AND (status=200 OR method="POST") | stats count by src_ip