pam_tty_audit(8) — Linux manual page
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(8)
AUTHOR
pam_tty_audit was written by Miloslav Trmač <mitr@redhat.com>.
The log_passwd option was added by Richard Guy Briggs
<rgb@redhat.com>.
COLOPHON
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
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