Bug 2281505 (CVE-2024-34083)

Summary:	CVE-2024-34083 aiosmtpd: servers based on aiosmtpd accept extra unencrypted commands
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:	2281506, 2281507
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Description ybuenos 2024-05-19 15:05:43 UTC

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.

https://github.com/aio-libs/aiosmtpd/commit/b3a4a2c6ecfd228856a20d637dc383541fcdbfda
https://github.com/aio-libs/aiosmtpd/security/advisories/GHSA-wgjv-9j3q-jhg8
https://nostarttls.secvuln.info

Comment 1 ybuenos 2024-05-19 15:06:02 UTC

Created python-aiosmtpd tracking bugs for this issue:

Affects: epel-7 [bug 2281506]
Affects: fedora-all [bug 2281507]