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https://issues.apache.org/jira/browse/YARN-2552?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14170907#comment-14170907
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Remus Rusanu commented on YARN-2552:
------------------------------------
Copying here the patch' apt.vm update:
> 'yarn.nodemanager.windows-secure-container-executor.local-dirs' should
> contain the nodemanager local dirs. hadoopwinutilsvc will allow only file
> operations under these directories. This should contain the same values as
> '${yarn.nodemanager.local-dirs}, ${yarn.nodemanager.log-dirs}' but note that
> hadoopwinutilsvc XML configuration processing does not do substitutions so
> the value must be the final value. All paths must be absolute and no
> environment variable substitution will be performed. The paths are compared
> LOCAL_INVARIANT case insensitive string comparison, the file path validated
> must start with one of the paths listed in local-dirs configuration. Use
> comma as path separator.
> Windows Secure Container Executor: the privileged file operations of
> hadoopwinutilsvc should be constrained to localdirs only
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: YARN-2552
> URL: https://issues.apache.org/jira/browse/YARN-2552
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: nodemanager
> Reporter: Remus Rusanu
> Assignee: Remus Rusanu
> Labels: security, windows, wsce
> Attachments: YARN-2552.1.patch
>
>
> YARN-2458 added file manipulation operations executed in an elevated context
> by hadoopwinutilsvc. W/o any constraint, the NM (or a hijacker that takes
> over the NM) can manipulate arbitrary OS files under highest possible
> privileges, an easy elevation attack vector. The service should only allow
> operations on files/directories that are under the configured NM localdirs.
> It should read this value from wsce-site.xml, as the yarn-site.xml cannot be
> trusted, being writable by Hadoop admins (YARN-2551 ensures wsce-site.xml is
> only writable by system Administrators, not Hadoop admins).
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