CVE-2024-27305

5.3 · MEDIUM

Published Mar 12, 2024 aio-libs CWE-345 EPSS 0.37% (30th pctl) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Overview

CVE-2024-27305 is a medium-severity vulnerability affecting aio-libs aiosmtpd. It was published on March 12, 2024 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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

Check the references section for vendor advisories and patches from aio-libs. Update aiosmtpd to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status
aio-libs	aiosmtpd	>= 0, < 1.4.5	Affected

References

GitHub github.com/aio-libs/aiosmtpd/commit/24b6c79c8921cf1800e27ca144f4f37023982bbb GitHub github.com/aio-libs/aiosmtpd/security/advisories/GHSA-pr2m-px7j-xg65 Ref www.postfix.org/smtp-smuggling.html GitHub github.com/aio-libs/aiosmtpd/commit/24b6c79c8921cf1800e27ca144f4f37023982bbb GitHub github.com/aio-libs/aiosmtpd/security/advisories/GHSA-pr2m-px7j-xg65 Ref www.postfix.org/smtp-smuggling.html

Frequently Asked Questions

What is CVE-2024-27305?

CVE-2024-27305 is a medium-severity vulnerability affecting aio-libs aiosmtpd. It was published on March 12, 2024 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2024-27305?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-27305?

How can CyberStrike help with CVE-2024-27305?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-27305 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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