su: cannot set groups operation not permitted on rhel 7

By mistake we did chmod 777 on all directories of our rhel 7 server. Now we are trying to do su root from a different user but we are getting the following error su: cannot set groups: Operation not permitted.

Please let me know what steps i can follow to rectify the same.

1 Answer

chmod 4755 /bin/su 

After executing above command i was able to do login as su from normal user (after chmod 777 for all directories).

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