CVE-2026-34588 OpenEXR内存破坏漏洞

import struct # Proof of Concept for CVE-2026-34588 # This script demonstrates the integer overflow logic triggering the vulnerability. def simulate_overflow(nx, ny, wcount): # Simulate the vulnerable logic in internal_exr_undo_piz product = nx * ny * wcount # Simulate 32-bit signed integer overflow wrap-around # If product exceeds 2^31 - 1, it wraps to negative max_int32 = 2**31 - 1 if product > max_int32: wrapped = product - 2**32 print(f"[+] Integer Overflow Detected!") print(f" Calculated Product: {product}") print(f" Wrapped Value (32-bit signed): {wrapped}") return True return False # Input values that would trigger the overflow in a crafted EXR file # For example, large width (nx) and height (ny) nx = 70000 ny = 70000 wcount = 1 if simulate_overflow(nx, ny, wcount): print("[*] Vulnerability condition confirmed: Integer overflow leads to invalid pointer.") print("[*] Opening a crafted EXR file with these dimensions would crash the application.")