CVE-2026-3779 Foxit PDF释放后重用漏洞

import fpdf # Proof of Concept Generator for CVE-2026-3779 # This script generates a PDF structure intended to trigger the list box calculation logic. # Note: Actual exploitation requires precise memory layout control and heap grooming. def generate_malicious_pdf(filename): pdf = fpdf.FPDF() pdf.add_page() pdf.set_font("Arial", size=12) pdf.cell(200, 10, txt="CVE-2026-3779 PoC Trigger", ln=1, align='C') # In a real exploit, specific JavaScript or Form objects would be crafted here # to force the deletion and recreation of the list box object. # Simulating the trigger condition conceptually malicious_js = """ // Conceptual trigger for UAF in list box calculation var f = this.getField("listbox"); // Logic to force object deletion/recreation and stale reference access """ # Embed JavaScript (Simplified representation) # In a real scenario, this would involve low-level PDF stream manipulation pdf.output(filename) print(f"[+] PoC PDF generated: {filename}") if __name__ == "__main__": generate_malicious_pdf("cve_2026_3779_poc.pdf")