CVE-2024-28892: Mayuresh82 Gocast RCE Vulnerability

CVE-2024-28892 Overview

An OS command injection vulnerability exists in the name parameter of GoCast version 1.1.3. This vulnerability allows remote attackers to execute arbitrary commands on the underlying operating system through specially crafted HTTP requests. The flaw is particularly dangerous as it requires no authentication, enabling any network-accessible attacker to potentially gain full control of the affected system.

Critical Impact

Unauthenticated remote attackers can execute arbitrary OS commands with the privileges of the GoCast application, potentially leading to complete system compromise, data exfiltration, or lateral movement within the network.

Affected Products

• Mayuresh82 GoCast version 1.1.3

Discovery Timeline

• 2024-11-21 - CVE-2024-28892 published to NVD
• 2024-12-20 - Last updated in NVD database

Technical Details for CVE-2024-28892

Vulnerability Analysis

This command injection vulnerability (CWE-78) exists within the HTTP request handling functionality of GoCast, specifically affecting the name parameter. The application fails to properly sanitize user-supplied input before passing it to system-level command execution functions. When a malicious payload is submitted through the name parameter via an HTTP request, the untrusted data is directly incorporated into OS commands, allowing arbitrary command execution.

The vulnerability is accessible over the network without any authentication requirements, making it trivially exploitable by any attacker who can reach the GoCast service. Successful exploitation grants the attacker the ability to execute commands with the same privileges as the GoCast process, which could lead to complete system compromise depending on the deployment configuration.

Root Cause

The root cause of this vulnerability is improper input validation and sanitization in the handling of the name parameter. The application directly interpolates user-controlled input into shell commands or system calls without adequate escaping or filtering of shell metacharacters. This allows attackers to break out of the intended command context and inject additional commands using shell operators such as semicolons, pipes, backticks, or command substitution syntax.

Attack Vector

The attack vector involves sending a specially crafted HTTP request to the GoCast application with a malicious payload in the name parameter. Since no authentication is required, an attacker only needs network access to the GoCast service to exploit this vulnerability.

A typical attack scenario involves injecting shell metacharacters followed by arbitrary commands into the name parameter. The vulnerability allows attackers to chain commands, redirect output, or spawn reverse shells. For detailed technical analysis and exploitation techniques, refer to the Talos Intelligence Vulnerability Report.

Detection Methods for CVE-2024-28892

Indicators of Compromise

• Unusual HTTP requests to GoCast endpoints containing shell metacharacters (;, |, $(), backticks) in the name parameter
• Unexpected child processes spawned by the GoCast application
• Abnormal outbound network connections originating from the GoCast process
• System command execution logs showing commands not typically associated with GoCast operations

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block HTTP requests containing OS command injection patterns in parameters
• Monitor application logs for requests with suspicious characters or encoded payloads in the name parameter
• Deploy endpoint detection and response (EDR) solutions to identify anomalous process execution chains originating from web application processes
• Configure intrusion detection systems (IDS) with signatures for common command injection payloads

Monitoring Recommendations

• Enable verbose logging for the GoCast application to capture all incoming HTTP requests and parameters
• Monitor process creation events on systems running GoCast, alerting on unexpected shell or interpreter processes
• Implement network traffic analysis to detect command-and-control communications or data exfiltration attempts
• Review system audit logs regularly for signs of unauthorized access or privilege escalation

How to Mitigate CVE-2024-28892

Immediate Actions Required

• If possible, restrict network access to the GoCast service to trusted IP addresses only using firewall rules
• Consider temporarily disabling the GoCast service until a patched version is available
• Implement a reverse proxy or WAF in front of GoCast to filter malicious input patterns
• Run GoCast with minimal system privileges to limit the impact of successful exploitation

Patch Information

As of the last update on 2024-12-20, users should check the official GoCast repository for updated versions that address this vulnerability. Consult the Talos Intelligence Vulnerability Report for the latest remediation guidance and any available patches.

Workarounds

• Deploy network segmentation to isolate systems running GoCast from critical infrastructure
• Implement strict input validation at the network perimeter using a WAF configured to reject requests containing shell metacharacters
• Use containerization to run GoCast in an isolated environment with restricted system access
• Monitor and alert on any attempts to access the vulnerable endpoint with suspicious parameters