Not able to "su - user" from the host system.

Solution Unverified - Updated -

Issue

  • Can ssh directly to the user, but cannot su to the user from inside the host. Root can change to any user, so the su command is working. The su binary is setuid.
  • Using a correct password for root and the binary reports permission denied.

Environment

  • Red Hat Enterprise Linux 5.8 - All architectures
  • Red Hat Enterprise Linux 6 - All architectures

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