[New-bugs-announce] [issue22638] ssl module: the SSLv3 protocol is vulnerable ("POODLE" attack)

STINNER Victor report at bugs.python.org
Wed Oct 15 01:11:15 CEST 2014

New submission from STINNER Victor:

Copy of Donald Stuff email sent to python-dev:

A big security breach of SSL 3.0 just dropped a little while ago (named POODLE).
With this there is now no ability to securely connect via SSL 3.0. I believe
that we should disable SSL 3.0 in Python similarly to how SSL 2.0 is disabled,
where it is disabled by default unless the user has explicitly re-enabled it.

The new attack essentially allows reading the sensitive data from within a SSL
3.0 connection stream. It takes roughly 256 requests to break a single byte so
the attack is very practical. You can read more about the attack here at the
google announcement [1] or the whitepaper [2].

[1] http://googleonlinesecurity.blogspot.com/2014/10/this-poodle-bites-exploiting-ssl-30.html
[2] https://www.openssl.org/~bodo/ssl-poodle.pdf

messages: 229368
nosy: haypo
priority: normal
severity: normal
status: open
title: ssl module: the SSLv3 protocol is vulnerable ("POODLE" attack)
type: security
versions: Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4, Python 3.5

Python tracker <report at bugs.python.org>

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