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Date: Fri, 14 Apr 2017 12:37:50 +0200
From: Pali Rohár <>
Subject: Re: CVE-2017-3305 - The Riddle vulnerability in MySQL client (public disclosure)

On Friday 17 March 2017 11:54:35 Pali Rohár wrote:
> Hi!
> There is a new vulnerability in MySQL client versions 5.5 and 5.6
> which is related to SSL/TLS encryption and to older BACKRONYM
> vulnerability.
> As it is common, new vulnerability should have a name, logo and
> website. So enjoy the *Riddle* at
> Affected are only Oracle's MySQL clients in all versions 5.5 and 5.6
> when SSL/TLS encryption is used. Verification of encryption
> parameters and existence of SSL/TLS layer by MySQL client is done
> *after* client successfully finish authentication.
> For more details including mitigation, look at Technical section on
> vulnerability website:

Just to note that also last version 6.0.2 of MySQL Connector/C 6.0 
series (which is still supported) is affected by this vulnerability.

Pali Rohár

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