CVE-2023-2531
📋 TL;DR
This vulnerability allows attackers to perform unlimited authentication attempts against AzuraCast instances, enabling brute-force attacks to guess valid credentials. It affects all AzuraCast installations running versions prior to 0.18.3, potentially compromising administrative accounts and system security.
💻 Affected Systems
- AzuraCast
📦 What is this software?
Azuracast by Azuracast
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through successful brute-force of administrative credentials, leading to unauthorized access, data theft, and potential ransomware deployment.
Likely Case
Successful credential guessing leading to unauthorized access to the AzuraCast control panel, allowing attackers to modify configurations, upload malicious content, or disrupt broadcasting services.
If Mitigated
Limited impact with proper rate limiting and monitoring in place, though authentication attempts may still consume system resources.
🎯 Exploit Status
Simple brute-force tools can exploit this vulnerability without any authentication required. The exploit is trivial to implement using standard HTTP requests.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.18.3
Vendor Advisory: https://github.com/azuracast/azuracast/commit/bdb23594ad3e0c47c8568ce028a7c244a406cf9d
Restart Required: Yes
Instructions:
1. Backup your current installation. 2. Update to AzuraCast version 0.18.3 or later. 3. For Docker installations: pull latest image and recreate containers. 4. For traditional installations: run the update script. 5. Restart all AzuraCast services.
🔧 Temporary Workarounds
Web Application Firewall Rate Limiting
linuxImplement rate limiting at the web server or WAF level to restrict authentication attempts
# Example nginx rate limiting
limit_req_zone $binary_remote_addr zone=auth:10m rate=5r/m;
location /admin {
limit_req zone=auth burst=10 nodelay;
}
IP-based Access Restrictions
linuxRestrict access to the admin interface to trusted IP addresses only
# Example nginx IP restriction
location /admin {
allow 192.168.1.0/24;
allow 10.0.0.0/8;
deny all;
}
🧯 If You Can't Patch
- Implement network-level rate limiting using a WAF or reverse proxy
- Enable multi-factor authentication if supported, or implement IP whitelisting for admin access
🔍 How to Verify
Check if Vulnerable:
Check your AzuraCast version. If it's below 0.18.3, you are vulnerable. Attempt to send multiple rapid authentication requests to the login endpoint and observe if they are all processed without delay.Check Version:
docker exec azuracast_web php /var/azuracast/www/bin/console azuracast:versionVerify Fix Applied:
After updating to 0.18.3+, attempt multiple rapid authentication requests. The system should now implement rate limiting and return appropriate HTTP 429 responses for excessive attempts.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from same IP address
- Rapid sequence of POST requests to /login endpoint
- Unusual authentication patterns outside normal business hours
Network Indicators:
- High volume of HTTP POST requests to authentication endpoints
- Traffic patterns showing credential stuffing attack signatures
SIEM Query:
source="azuracast" (url="/login" OR url="/admin/login") | stats count by src_ip | where count > 10🔗 References
- https://github.com/azuracast/azuracast/commit/bdb23594ad3e0c47c8568ce028a7c244a406cf9d
- https://huntr.dev/bounties/20463eb2-0f9d-4ea3-a2c8-93f80e7aca02
- https://github.com/azuracast/azuracast/commit/bdb23594ad3e0c47c8568ce028a7c244a406cf9d
- https://huntr.dev/bounties/20463eb2-0f9d-4ea3-a2c8-93f80e7aca02
