CVE-2024-27305

SMTP smuggling in aiosmtpd

Published Mar 12, 2024 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-0215 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.
Github GHSA Github GHSA GHSA-pr2m-px7j-xg65 aiosmtpd vulnerable to SMTP smuggling
History
Type Values Removed Values Added
First Time appeared Aio-libs
Aio-libs aiosmtpd
CPEs cpe:2.3:a:aio-libs:aiosmtpd:*:*:*:*:*:*:*:*
Vendors & Products Aio-libs
Aio-libs aiosmtpd
Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 2, 2024, 12:27 AM
Reserved
Feb 22, 2024, 6:08 PM
Status
Analyzed
Published
Mar 12, 2024, 9:15 PM
Modified
Jun 17, 2026, 7:19 AM