CVE-2024-29224: Mayuresh82 Gocast RCE Vulnerability

CVE-2024-29224 Overview

CVE-2024-29224 is an OS command injection vulnerability affecting the NAT parameter in GoCast version 1.1.3. This vulnerability allows remote attackers to execute arbitrary commands on the target system by sending specially crafted HTTP requests. The attack requires no authentication, making it particularly dangerous for exposed instances of the affected software.

Critical Impact

Unauthenticated remote attackers can achieve arbitrary command execution on affected GoCast instances, potentially leading to complete system compromise.

Affected Products

• GoCast version 1.1.3
• mayuresh82 GoCast package

Discovery Timeline

• 2024-11-21 - CVE-2024-29224 published to NVD
• 2024-12-17 - Last updated in NVD database

Technical Details for CVE-2024-29224

Vulnerability Analysis

This vulnerability exists due to improper input validation in the NAT parameter handling within GoCast. When processing HTTP requests containing the NAT parameter, GoCast fails to properly sanitize user-supplied input before passing it to OS-level command execution functions. This allows an attacker to inject arbitrary shell commands that will be executed with the privileges of the GoCast process.

The vulnerability is classified under CWE-78 (Improper Neutralization of Special Elements used in an OS Command), commonly referred to as OS Command Injection. Since the attack can be performed remotely over the network without any authentication requirements and without user interaction, exposed instances are at significant risk.

Root Cause

The root cause of this vulnerability is insufficient input validation and sanitization of the NAT parameter before it is used in system command execution. The application fails to implement proper escaping or validation of special characters that could be interpreted as command separators or shell metacharacters, allowing attackers to break out of the intended command context and inject malicious commands.

Attack Vector

An attacker can exploit this vulnerability by sending a specially crafted HTTP request to a GoCast instance. The malicious payload is embedded within the NAT parameter, using shell metacharacters such as semicolons (;), pipes (|), or command substitution syntax to append or inject additional commands.

The attack is network-based and requires no prior authentication or user interaction. Once exploited, the attacker gains the ability to execute arbitrary commands with the same privileges as the GoCast service, potentially leading to full system compromise, data exfiltration, or lateral movement within the network.

For detailed technical information about this vulnerability, refer to the Talos Intelligence Vulnerability Report.

Detection Methods for CVE-2024-29224

Indicators of Compromise

• Unusual HTTP requests to GoCast endpoints containing shell metacharacters (;, |, $(), backticks) in the NAT parameter
• Unexpected child processes spawned by the GoCast service
• Anomalous outbound network connections originating from the GoCast process
• Suspicious command history or audit logs showing commands not typically associated with GoCast operations

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block requests containing command injection patterns in the NAT parameter
• Monitor HTTP request logs for suspicious characters and patterns indicative of command injection attempts
• Deploy endpoint detection and response (EDR) solutions to identify unauthorized command execution from the GoCast process
• Create custom SIEM rules to correlate GoCast HTTP access logs with system command execution events

Monitoring Recommendations

• Enable detailed logging for all HTTP requests received by GoCast instances
• Configure process monitoring to alert on child processes spawned by the GoCast service
• Implement network segmentation and monitor traffic patterns to and from GoCast servers
• Regularly audit system logs for signs of unauthorized access or command execution

How to Mitigate CVE-2024-29224

Immediate Actions Required

• Identify all GoCast 1.1.3 instances in your environment
• Restrict network access to GoCast instances using firewall rules to limit exposure
• Place GoCast behind a reverse proxy with input validation capabilities
• Monitor affected systems for signs of exploitation while remediation is in progress
• Consider temporarily disabling GoCast if it is not critical to operations

Patch Information

Organizations should check the official GoCast repository and security advisories for updated versions that address this vulnerability. Monitor the Talos Intelligence Vulnerability Report for additional remediation guidance and updates.

Workarounds

• Implement strict network access controls to limit which hosts can communicate with GoCast instances
• Deploy a web application firewall (WAF) configured to filter command injection patterns in the NAT parameter
• Run GoCast with minimal privileges using a dedicated service account with restricted permissions
• Use container isolation or sandboxing to limit the impact of potential exploitation

# Example: Restrict network access to GoCast using iptables
# Only allow trusted management hosts to access GoCast
iptables -A INPUT -p tcp --dport 8080 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 8080 -j DROP