CVE-2024-0642: Cires21 Live Encoder Auth Bypass Flaw

CVE-2024-0642 Overview

CVE-2024-0642 is a critical broken access control vulnerability affecting the C21 Live Encoder and Live Mosaic product, version 5.3. This vulnerability allows a remote attacker to access the application as an administrator user through the application endpoint, due to lack of proper credential management. The flaw represents a severe security gap in authentication mechanisms that could lead to complete system compromise.

Critical Impact

Remote attackers can gain full administrative access to the Live Encoder and Live Mosaic systems without proper authentication, potentially compromising broadcast infrastructure and media encoding operations.

Affected Products

• Cires21 Live Encoder version 5.3
• Cires21 Live Mosaic version 5.3

Discovery Timeline

• 2024-01-17 - CVE-2024-0642 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2024-0642

Vulnerability Analysis

This vulnerability is classified under CWE-284 (Improper Access Control), which occurs when the software does not properly restrict access to resources or functionality. In the case of Cires21 Live Encoder and Live Mosaic, the application fails to implement adequate credential management, allowing unauthenticated remote attackers to bypass authentication mechanisms entirely.

The vulnerability enables network-based attacks with low complexity, requiring no privileges or user interaction to exploit. An attacker can leverage this flaw to gain administrative access to the application, which could result in complete compromise of confidentiality, integrity, and availability of the affected system.

Root Cause

The root cause of CVE-2024-0642 stems from inadequate access control implementation within the application's authentication layer. The credential management system lacks proper validation checks, allowing unauthorized access to administrative endpoints. This design flaw enables attackers to interact with the application as privileged users without providing valid credentials.

Attack Vector

The attack vector for CVE-2024-0642 is network-based, meaning an attacker can exploit this vulnerability remotely without requiring local system access. The exploitation process involves:

1. Identifying an exposed C21 Live Encoder or Live Mosaic instance on the network
2. Accessing the application's administrative endpoint directly
3. Bypassing authentication due to improper credential validation
4. Gaining full administrative privileges over the broadcast/encoding system

Due to the sensitive nature of this vulnerability and to avoid enabling malicious exploitation, specific exploitation details are not provided. For technical details, refer to the INCIBE Security Notice.

Detection Methods for CVE-2024-0642

Indicators of Compromise

• Unusual administrative login activity from unknown or external IP addresses
• Access logs showing successful authentication without corresponding credential submission
• Unauthorized configuration changes to encoding or mosaic settings
• Multiple administrative sessions from different geographic locations simultaneously

Detection Strategies

• Monitor authentication logs for successful admin access that bypasses normal credential workflows
• Implement network-level monitoring for connections to administrative endpoints from untrusted sources
• Deploy web application firewall (WAF) rules to detect anomalous access patterns to management interfaces
• Utilize SentinelOne's behavioral detection capabilities to identify unauthorized administrative actions

Monitoring Recommendations

• Enable detailed logging on all Cires21 Live Encoder and Live Mosaic administrative interfaces
• Configure alerts for administrative access from non-whitelisted IP addresses
• Review access logs regularly for authentication anomalies
• Monitor for any unexpected changes to system configurations or user accounts

How to Mitigate CVE-2024-0642

Immediate Actions Required

• Restrict network access to administrative interfaces using firewall rules or network segmentation
• Implement VPN or IP whitelisting for administrative access to affected systems
• Review and audit current administrative accounts and access logs for signs of compromise
• Consider taking affected systems offline until patches or workarounds can be applied

Patch Information

At the time of publication, refer to the INCIBE Security Notice for the latest vendor guidance and available patches. Contact Cires21 directly for updated firmware or software versions that address this vulnerability.

Workarounds

• Implement network segmentation to isolate Live Encoder and Live Mosaic systems from untrusted networks
• Deploy a reverse proxy with authentication in front of the application to add an additional security layer
• Use firewall rules to restrict access to management interfaces to trusted IP addresses only
• Enable multi-factor authentication at the network perimeter level if available

# Example firewall rule to restrict admin interface access
# Allow only trusted management network to access admin interface
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP