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  1. RHEL
  2. RHEL-24946

Cannot execute "tlog-rec" as a confined user [rhel-9]

    • selinux-policy-38.1.32-1.el9
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    • Medium
    • sst_security_selinux
    • ssg_security
    • 25
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    • QE ack
    • False
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    • Red Hat Enterprise Linux
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      When a confined user executes the tlog-rec command, it does not produce any failed messages.

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      When a confined user executes the tlog-rec command, it does not produce any failed messages.
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      What were you trying to do that didn't work?

      Trying to execute tlog-rec as a confined user, there is no AVC but the command is failing to spawn the command being recorded:

      [staff@vm-rhel8 ~]$ id -Z
      staff_u:staff_r:staff_t:s0-s0:c0.c1023
      
      [staff@vm-rhel8 ~]$ tlog-rec -o log.out echo hello
      Locale charset is ANSI_X3.4-1968 (ASCII)
      Assuming locale environment is lost and charset is UTF-8
      Failed adding a utmp record
      Success
      Failed removing utmp record
      Failed setting up the I/O tap
      

      There is no AVC because of a dontaudit rule:

      term_dontaudit_use_ptmx(utempter_t)
      

      This rule has to be removed from the policy and the proper rule be added, since it's required to let utempter_t write/read/getattr on the ptmx, by design:

      term_use_ptmx(utempter_t)
      

      Please provide the package NVR for which bug is seen:

      RHEL8, RHEL9 and Upstream policy.

      How reproducible:

      Always, see above.

            rhn-support-zpytela Zdenek Pytela
            rhn-support-rmetrich Renaud Métrich
            Zdenek Pytela Zdenek Pytela
            Milos Malik Milos Malik
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              Created:
              Updated:
              Resolved: