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https://issues.apache.org/jira/browse/AMBARI-20018?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15981850#comment-15981850
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Robert Levas commented on AMBARI-20018:
---------------------------------------
[~bmartin], This is merely a documentation change. The actual fix was in
Ambari 2.4.0, but someone requested that the docs be updated to discourage
users from turning the feature off.
> Document security issue related to setting security.agent.hostname.validate
> to false
> ------------------------------------------------------------------------------------
>
> Key: AMBARI-20018
> URL: https://issues.apache.org/jira/browse/AMBARI-20018
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.4.0
> Reporter: Robert Levas
> Assignee: Robert Levas
> Fix For: 2.5.0
>
> Attachments: AMBARI-20018_branch-2.5_01.patch,
> AMBARI-20018_branch-2.5_02.patch, AMBARI-20018_trunk_01.patch,
> AMBARI-20018_trunk_02.patch
>
>
> Document security issue related to setting security.agent.hostname.validate
> to "false".
> If set to "false", invalid hostnames may be used in OpenSSL commands used to
> create the agent-side certificates when 2-way SSL is enabled. This could lead
> to issues when executing OpenSSL as described in CVE-2014-3582. See
> https://cwiki.apache.org/confluence/display/AMBARI/Ambari+Vulnerabilities.
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