# CVE-2024-34083: python-aiosmtpd: aiosmptd is  a reimplementation of the Python stdlib smtpd.py based on asyncio

CVE-2024-34083 is fixed in python-aiosmtpd on 1 platform, first by DEBIAN-CVE-2024-34083, released May 18, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-34083
- Priority: Routine
- CVSS: 5.4 (medium)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 18, 2024

## Description

aiosmptd is  a reimplementation of the Python stdlib smtpd.py based on asyncio. Prior to version 1.4.6, servers based on aiosmtpd accept extra unencrypted commands after STARTTLS, treating them as if they came from inside the encrypted connection. This could be exploited by a man-in-the-middle attack. Version 1.4.6 contains a patch for the issue.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | python-aiosmtpd Debian 12.15 (bookworm) | 1.4.3-1.1+deb12u1 | [DEBIAN-CVE-2024-34083](https://patchblox.com/security/data/fix/linux/debian-cve-2024-34083.md) | May 18, 2024 |
| Linux | python-aiosmtpd Debian 13.5 (trixie) | 1.4.6-1 | [DEBIAN-CVE-2024-34083](https://patchblox.com/security/data/fix/linux/debian-cve-2024-34083.md) | May 18, 2024 |
| Linux | python-aiosmtpd Debian 14 | 1.4.6-1 | [DEBIAN-CVE-2024-34083](https://patchblox.com/security/data/fix/linux/debian-cve-2024-34083.md) | May 18, 2024 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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