STINNER Victor <vstin...@redhat.com> added the comment:
Python 2.7 doesn't have email.policy module.
For Python 2.7, I wrote this code:
---
import email.header
import email.message
msg = email.message.Message()
msg.set_charset("UTF-8")
msg['Subject'] = email.header.Header(u'\u0105' * 12, maxlinelen=20,
charset="UTF-8")
print(msg.as_string())
---
I get this output:
---
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Subject: =?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
=?utf-8?b?xIU=?=
---
I have no idea if this example says that Python 2.7 is vulnerable or not. I get
a different output on the master branch:
---
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: base64
Subject: =?utf-8?b?xIXEhcSFxIXEhcSFxIXEhcSFxIXEhcSF?=
---
But I don't know if I use the email API properly. "Subject:
=?utf-8?b?xIXEhcSFxIXEhcSFxIXEhcSFxIXEhcSF?=" is longer than 20 characters.
----------
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue33529>
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