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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MODULE TYPES PROVIDED | RETURN VALUES | NOTES | EXAMPLES | SEE ALSO | AUTHOR | COLOPHON |
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PAM_TTY_AUDIT(8) Linux-PAM Manual PAM_TTY_AUDIT(8)
pam_tty_audit - Enable or disable TTY auditing for specified users
pam_tty_audit.so [disable=patterns] [enable=patterns]
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.
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?).
Only the session type is supported.
PAM_SESSION_ERR
Error reading or modifying the TTY audit flag. See the system
log for more details.
PAM_SUCCESS
Success.
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.
Audit all administrative actions.
session required pam_tty_audit.so disable=* enable=root
aureport(8), pam.conf(5), pam.d(5), pam(8)
pam_tty_audit was written by Miloslav Trmač <mitr@redhat.com>. The
log_passwd option was added by Richard Guy Briggs
<rgb@redhat.com>.
This page is part of the linux-pam (Pluggable Authentication
Modules for Linux) project. Information about the project can be
found at ⟨http://www.linux-pam.org/⟩. If you have a bug report
for this manual page, see ⟨//www.linux-pam.org/⟩. This page was
obtained from the project's upstream Git repository
⟨https://github.com/linux-pam/linux-pam.git⟩ on 2023-12-22. (At
that time, the date of the most recent commit that was found in
the repository was 2023-12-18.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
Linux-PAM Manual 12/22/2023 PAM_TTY_AUDIT(8)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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