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https://issues.apache.org/jira/browse/MAPREDUCE-1991?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12903248#action_12903248
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Ravi Gummadi commented on MAPREDUCE-1991:
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I meant the following for the following 8 linux task controller based tests:
TestLocalizationWithLinuxTaskController
TestTrackerDistributedCacheManagerWithLinuxTaskController
TestJobExecutionAsDifferentUser
TestStreamingAsDifferentUser
TestPipesAsDifferentUser
TestDebugSciptWithLinuxTaskController
TestKillSubProcessesWithLinuxTaskController
TestLinuxTaskController
Sample test run as tasktracker_user(Jobs in the test are run as same user as
the user who started the tasktracker):
user1$ ant test
-Dtaskcontroller-path=<Path_Of_Directory_In_which_taskController_Is_setup>
-Dtaskcontroller-ugi=user1,group_of_user1 -Dtest.output=yes
-Dtestcase=TestLocalizationWithLinuxTaskController
Sample test run as other_user(Jobs in the test are run as different user than
the user who started the tasktracker):
user1$ ant test
-Dtaskcontroller-path=<Path_Of_Directory_In_which_taskController_Is_setup>
-Dtaskcontroller-ugi=other_user,group_of_other_user -Dtest.output=yes
-Dtestcase=TestLocalizationWithLinuxTaskController
<Path_Of_Directory_In_which_taskController_Is_setup> is the directory under
which task-controller executable exists and its owner and group are set to
root:tt_special_group and permissions are set to rwsr-s---. Here,
tt_special_group is the group in which task tracker user is the only member(The
user who is running the above ant commands is task tracker user).
other_user,group_of_other_user can be nobody,nobody(which mostly exist on all
linux machines).
> taskcontroller allows stealing permissions on any local file
> ------------------------------------------------------------
>
> Key: MAPREDUCE-1991
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1991
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: task-controller
> Affects Versions: 0.22.0
> Reporter: Todd Lipcon
> Assignee: Todd Lipcon
> Priority: Blocker
> Attachments: mapreduce-1991-v2.txt, mapreduce-1991.txt
>
>
> The linux task-controller setuid binary allows a malicious user to chmod any
> file on the system to 644 (and as a side effect appends some junk to the end)
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