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From "Lars Francke (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMBARI-20545) Remove the use of legacy SSL and TLS protocol versions
Date Mon, 22 Jan 2018 18:01:00 GMT

    [ https://issues.apache.org/jira/browse/AMBARI-20545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16334639#comment-16334639
] 

Lars Francke commented on AMBARI-20545:
---------------------------------------

Sorry, yeah that was my assumption as well (without explicitly saying so): I think we should
disable insecure things by default if at all possible. This would be one instance. People
can just change the property if they want to enable older protocols again.

> Remove the use of legacy SSL and TLS protocol versions
> ------------------------------------------------------
>
>                 Key: AMBARI-20545
>                 URL: https://issues.apache.org/jira/browse/AMBARI-20545
>             Project: Ambari
>          Issue Type: Bug
>          Components: ambari-server, security
>    Affects Versions: 2.4.2
>            Reporter: Andy LoPresto
>            Assignee: Robert Levas
>            Priority: Major
>              Labels: security, ssl, tls
>             Fix For: trunk
>
>
> I notice that the explicit enabling of various protocols still includes SSLv2Hello and
SSLv3, which are severely broken protocols with numerous known vulnerabilities and not necessary
for legacy compatibility. Even TLSv1 and TLSv1.1 have been [discouraged since February 2014|https://community.qualys.com/thread/12421],
when all modern browsers supported TLSv1.2. Is there any reason Ambari still needs to enable
support for these legacy protocols, and are there any other mitigating controls put in place
to prevent downgrade, brute force, padding oracle, and weak parameter attacks against these
protocols? Thanks. 



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