CVE-2024-27305
aiosmtpd vulnerable to SMTP smuggling
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.
How to fix CVE-2024-27305
To remediate CVE-2024-27305, upgrade the affected package to a fixed version below.
- —upgrade to 1.2.2-1+deb11u1 or later
- —upgrade to 1.4.5 or later
- —upgrade to 24b6c79c8921cf1800e27ca144f4f37023982bbb or later
Is CVE-2024-27305 being exploited?
Low — EPSS is 0.7%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 1.2.2-1+deb11u1
- from 0, < 1.4.5
- from 0, < 24b6c79c8921cf1800e27ca144f4f37023982bbb, < 24b6c79c8921cf1800e27ca144f4f37023982bbb | from 0, < 1.4.5
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |