CVE-2024-3566: Golang Go RCE Vulnerability

CVE-2024-3566 Overview

A command injection vulnerability (CWE-77) affects Windows applications that indirectly depend on the CreateProcess function when specific conditions are satisfied. This vulnerability, also known as "BatBadBut," allows attackers to perform command injection attacks on Windows systems through multiple programming language runtimes and libraries that improperly handle command-line argument escaping when invoking batch files or command-line programs.

Critical Impact

This vulnerability enables remote command injection on Windows systems across multiple programming languages including Go, Node.js, PHP, Rust, and Haskell, potentially allowing complete system compromise without authentication.

Affected Products

• Golang Go (multiple versions)
• Node.js (multiple versions)
• PHP (multiple versions)
• Rust-lang Rust 1.77.2
• Haskell process_library 1.6.19.0
• yt-dlp (multiple versions)
• Microsoft Windows

Discovery Timeline

• 2024-04-10 - CVE-2024-3566 published to NVD
• 2025-11-18 - Last updated in NVD database

Technical Details for CVE-2024-3566

Vulnerability Analysis

The vulnerability stems from inconsistent handling of command-line argument quoting and escaping between programming language runtimes and the Windows CreateProcess API. When applications written in affected languages execute external commands, particularly batch files (.bat, .cmd), the argument escaping mechanisms fail to properly sanitize special characters that have meaning to the Windows command interpreter (cmd.exe).

The Windows CreateProcess function has unique requirements for command-line argument quoting that differ significantly from POSIX systems. While many programming languages implement argument escaping to prevent shell injection on Linux/Unix systems, these same languages historically failed to account for Windows-specific escape sequences and the way cmd.exe interprets certain characters like %, ^, !, &, |, and others.

This vulnerability is particularly dangerous because it affects the core command execution functionality across multiple major programming ecosystems simultaneously, creating a widespread attack surface across Windows deployments.

Root Cause

The root cause lies in the fundamental mismatch between how programming language standard libraries escape command-line arguments and how the Windows command interpreter (cmd.exe) processes them. When a program uses these language runtimes to execute batch files or commands that invoke cmd.exe, specially crafted arguments containing Windows-specific metacharacters can break out of the intended argument context and inject arbitrary commands.

The Microsoft documentation on command-line argument handling highlights the complexity of proper argument escaping on Windows, which many language implementations failed to handle correctly.

Attack Vector

The attack vector is network-based, requiring no privileges or user interaction. An attacker can exploit this vulnerability by:

1. Providing malicious input to an application that eventually passes it as arguments to command execution functions
2. Using special characters that escape the argument quoting context
3. Injecting arbitrary commands that execute with the privileges of the vulnerable application

The vulnerability is triggered when the target application executes batch files or programs through cmd.exe while passing user-controlled input as command-line arguments. The malicious payload breaks out of the quoted argument context and executes attacker-controlled commands.

For detailed technical analysis and proof-of-concept information, refer to the Flatt Security research article and the CERT Vulnerability Advisory.

Detection Methods for CVE-2024-3566

Indicators of Compromise

• Unusual process trees with cmd.exe spawning unexpected child processes
• Command-line arguments containing suspicious character sequences such as &, |, %, ^, or ! in batch file invocations
• Unexpected network connections or file system modifications following batch script execution
• Application logs showing malformed or unusually long command-line arguments

Detection Strategies

• Monitor process creation events for cmd.exe processes with suspicious argument patterns
• Implement application-level logging for all external command executions
• Use endpoint detection and response (EDR) solutions to detect command injection patterns
• Deploy SentinelOne agents to leverage behavioral AI for detecting anomalous command execution chains

Monitoring Recommendations

• Enable command-line auditing via Windows Security Event Log (Event ID 4688) with process command-line logging
• Monitor for batch file executions from application directories that typically don't invoke batch scripts
• Implement SIEM rules to correlate unusual cmd.exe activity with inbound network connections
• Review application logs for error messages indicating command-line parsing failures

How to Mitigate CVE-2024-3566

Immediate Actions Required

• Update all affected programming language runtimes to the latest patched versions
• Review application code for instances where user input is passed to command execution functions
• Avoid executing batch files with user-controlled arguments where possible
• Implement strict input validation to reject special characters before command execution
• Consider using direct API calls instead of shell command execution where feasible

Patch Information

Security patches have been released for the affected programming language runtimes. Organizations should prioritize updating to patched versions:

• Rust: Update to versions released after 1.77.2 that include the security fix
• PHP: Apply patches addressing CVE-2024-1874
• Node.js: Update to the latest security release
• Go: Update to patched versions from the Golang project
• Haskell process_library: Update beyond version 1.6.19.0
• yt-dlp: Update to versions with the CVE-2024-22423 fix applied

Consult the CERT Vulnerability Advisory #123335 for comprehensive vendor-specific patch information.

Workarounds

• Avoid passing untrusted input as arguments to batch file executions
• Use direct executable invocation instead of batch files where possible
• Implement application-level argument sanitization that specifically handles Windows metacharacters
• Run vulnerable applications in sandboxed or containerized environments to limit impact
• Deploy network segmentation to limit the attack surface of affected applications

# Example: Input validation pattern for batch file arguments
# Reject arguments containing Windows shell metacharacters
# Characters to block: & | % ^ ! < > ( )
# Implement validation before passing to command execution functions

# Windows-specific: Use PowerShell with proper escaping instead of cmd.exe
# Or invoke executables directly without shell interpretation