Remus Rusanu created YARN-2552:
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Summary: 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
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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