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
The product, when processing trusted data, accepts any untrusted data that is also included with the trusted data, treating the untrusted data as if it were trusted.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Python-aiosmtpd | Ubuntu | focal | * |
| Python-aiosmtpd | Ubuntu | mantic | * |
| Python-aiosmtpd | Ubuntu | oracular | * |
| Python-aiosmtpd | Ubuntu | plucky | * |
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/141.html
- https://cwe.mitre.org/data/definitions/142.html
- https://cwe.mitre.org/data/definitions/75.html
References
- https://github.com/aio-libs/aiosmtpd/commit/b3a4a2c6ecfd228856a20d637dc383541fcdbfda
- https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-wgjv-9j3q-jhg8
- https://nostarttls.secvuln.info
- https://github.com/aio-libs/aiosmtpd/commit/b3a4a2c6ecfd228856a20d637dc383541fcdbfda
- https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-wgjv-9j3q-jhg8
- https://nostarttls.secvuln.info