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https://issues.apache.org/jira/browse/HADOOP-12691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15103219#comment-15103219
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Kengo Seki commented on HADOOP-12691:
-------------------------------------
Directory hadoop-common at the top level seems to be newly created by mistake.
https://github.com/apache/hadoop/tree/trunk/hadoop-common
> Add CSRF Filter for REST APIs to Hadoop Common
> ----------------------------------------------
>
> Key: HADOOP-12691
> URL: https://issues.apache.org/jira/browse/HADOOP-12691
> Project: Hadoop Common
> Issue Type: New Feature
> Components: security
> Reporter: Larry McCay
> Assignee: Larry McCay
> Fix For: 2.9.0
>
> Attachments: CSRFProtectionforRESTAPIs.pdf, HADOOP-12691-001.patch,
> HADOOP-12691-002.patch, HADOOP-12691-003.patch
>
>
> CSRF prevention for REST APIs can be provided through a common servlet
> filter. This filter would check for the existence of an expected
> (configurable) HTTP header - such as X-XSRF-Header.
> The fact that CSRF attacks are entirely browser based means that the above
> approach can ensure that requests are coming from either: applications served
> by the same origin as the REST API or that there is explicit policy
> configuration that allows the setting of a header on XmlHttpRequest from
> another origin.
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