aiosmtpd is vulnerable to inbound SMTP smuggling. SMTP smuggling is a novel vulnerability based on not so novel interpretation differences of the SMTP protocol. By exploiting SMTP smuggling, an attacker may send smuggle/spoof e-mails with fake sender addresses, allowing advanced phishing attacks. This issue also existed in other SMTP software like Postfix (https://www.postfix.org/smtp-smuggling.html).
Detailed information on SMTP smuggling can be found in the full blog post (https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/) or on the Postfix homepage (https://www.postfix.org/smtp-smuggling.html). (and soon on the official website https://smtpsmuggling.com/)
With the right SMTP server constellation, an attacker can send spoofed e-mails to inbound/receiving aiosmtpd instances.
{ "nvd_published_at": "2024-03-12T21:15:58Z", "cwe_ids": [ "CWE-345" ], "severity": "MODERATE", "github_reviewed": true, "github_reviewed_at": "2024-03-13T15:33:14Z" }