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Date: Mon, 5 Dec 2016 09:00:13 +0200
From: Aki Tuomi <>
Subject: Re: Important vulnerability in Dovecot (CVE-2016-8652)

On 02.12.2016 09:02, Aki Tuomi wrote:
> Important vulnerability in Dovecot (CVE-2016-8652)
> CVSS score: 7.4 (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H)
> Affected version(s): up to
> Fixed in:
> Short summary: Dovecot auth component can be crashed by remote user when
> auth-policy component is activated.
> If auth-policy component has been activated in Dovecot, then remote user
> can use SASL authentication to crash auth component.
> Workaround is to disable auth-policy component until fix is in place.
> This can be done by commenting out all auth_policy_* settings.
> Aki Tuomi
> Dovecot oy

The affected versions are from 2.2.25 to

Aki Tuomi
Dovecot oy

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