CVE-2024-27305

aiosmtpd is a reimplementation of the Python stdlib smtpd.py based on
asyncio. 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 is also existed in other SMTP software like
Postfix. With the right SMTP server constellation, an attacker can send
spoofed e-mails to inbound/receiving aiosmtpd instances. This issue has
been addressed in version 1.4.5. Users are advised to upgrade. There are no
known workarounds for this vulnerability.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1066820&gt;