CVE-2024-34083 STARTTLS unencrypted commands injection
Attackers can inject unencrypted commands after STARTTLS in aiosmtpd, bypassing encryption protections via man-in-the-middle attacks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-34083?
CVE-2024-34083 is a medium-severity vulnerability in aio-libs aiosmtpd, published on 18 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-349
Which versions are affected by CVE-2024-34083?
3 open source packages ship an affected version, including aiosmtpd.
| Package | Affected | Fixed in |
|---|---|---|
aiosmtpd PyPI | All versions | 1.4.6 |
aiosmtpd PyPI | All versions | 1.4.6 |
aiosmtpd PyPI | All versions | 1.4.6 |
How do I fix CVE-2024-34083?
Upgrade aiosmtpd to 1.4.6 or later.
Is CVE-2024-34083 being exploited?
There is no known exploitation of CVE-2024-34083 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2024-34083, GHSA-wgjv-9j3q-jhg8, OESA-2024-1695, OESA-2024-1696, PYSEC-2026-1111, UBUNTU-CVE-2024-34083 and 1 more.