CVE-2024-27305

Name	CVE-2024-27305
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	ELA-1147-1
Debian Bugs	1066820

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-aiosmtpd (PTS)	buster, buster (lts)	1.2-3+deb10u1	fixed
	bullseye	1.2.2-1+deb11u1	fixed
	bookworm	1.4.3-1.1+deb12u1	fixed
	trixie	1.4.6-1	fixed
	sid	1.4.6-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
python-aiosmtpd	source	buster	1.2-3+deb10u1	ELA-1147-1
python-aiosmtpd	source	bullseye	1.2.2-1+deb11u1
python-aiosmtpd	source	bookworm	1.4.3-1.1+deb12u1
python-aiosmtpd	source	(unstable)	1.4.6-1		1066820

Notes

[buster] - python-aiosmtpd <postponed> (Minor issue)
https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-pr2m-px7j-xg65
https://github.com/aio-libs/aiosmtpd/commit/24b6c79c8921cf1800e27ca144f4f37023982bbb (1.4.5)