man > pam_tty_audit(8)

PAM_TTY_AUDIT(8)                          Linux-PAM Manual                          PAM_TTY_AUDIT(8)

NAME
       pam_tty_audit - Enable or disable TTY auditing for specified users

SYNOPSIS


       pam_tty_audit.so [disable=patterns] [enable=patterns]

DESCRIPTION
       The pam_tty_audit PAM module is used to enable or disable TTY auditing. By default, the
       kernel does not audit input on any TTY.

OPTIONS
       disable=patterns
           For each user matching patterns, disable TTY auditing. This overrides any previous enable
           option matching the same user name on the command line. See NOTES for further description
           of patterns.

       enable=patterns
           For each user matching patterns, enable TTY auditing. This overrides any previous disable
           option matching the same user name on the command line. See NOTES for further description
           of patterns.

       open_only
           Set the TTY audit flag when opening the session, but do not restore it when closing the
           session. Using this option is necessary for some services that don't fork() to run the
           authenticated session, such as sudo.

       log_passwd
           Log keystrokes when ECHO mode is off but ICANON mode is active. This is the mode in which
           the tty is placed during password entry. By default, passwords are not logged. This
           option may not be available on older kernels (3.9?).

MODULE TYPES PROVIDED
       Only the session type is supported.

RETURN VALUES
       PAM_SESSION_ERR
           Error reading or modifying the TTY audit flag. See the system log for more details.

       PAM_SUCCESS
           Success.

NOTES
       When TTY auditing is enabled, it is inherited by all processes started by that user. In
       particular, daemons restarted by a user will still have TTY auditing enabled, and audit TTY
       input even by other users unless auditing for these users is explicitly disabled. Therefore,
       it is recommended to use disable=* as the first option for most daemons using PAM.

       To view the data that was logged by the kernel to audit use the command aureport --tty.

       The patterns are comma separated lists of glob patterns or ranges of uids. A range is
       specified as min_uid:max_uid where one of these values can be empty. If min_uid is empty only
       user with the uid max_uid will be matched. If max_uid is empty users with the uid greater
       than or equal to min_uid will be matched.

       Please note that passwords in some circumstances may be logged by TTY auditing even if the
       log_passwd is not used. For example, all input to an ssh session will be logged - even if
       there is a password being typed into some software running at the remote host because only
       the local TTY state affects the local TTY auditing.

EXAMPLES
       Audit all administrative actions.

           session   required pam_tty_audit.so disable=* enable=root



SEE ALSO
       aureport(8), pam.conf(5), pam.d(5), pam(7)

AUTHOR
       pam_tty_audit was written by Miloslav Trmač <mitr AT redhat.com>. The log_passwd option was
       added by Richard Guy Briggs <rgb AT redhat.com>.

Linux-PAM                                    05/07/2023                             PAM_TTY_AUDIT(8)