pam_tmpdir8
Pam module for creating a secure directory for users' temporary files
Usage
pam_tmpdir.so
Overview
This module can be plugged into the session stack of a given service to provide secure, per-user directories for temporary files.
Options
The directory in which the users' temporary directories are created can be set using an entry in /etc/security/tmpdir.conf:
tmpdir=/path/to/tmpdir
The default is /tmp/user.
Module types provided
Although this is intended to be used with the session module type, it also provides account, auth, and password module types.
Return values
- PAM_SUCCESS
-
The temporary directory was successfully created.
- PAM_ABORT
-
An error occurred when attempting to create the temporary directory.
- PAM_SERVICE_ERR
-
An internal error occurred.
Examples
To allow users to login even if pam_tmpdir fails to create a safe tmpdir:
-
session optional pam_tmpdir.so
To deny login if an error occurs while setting up the safe tmpdir:
-
session required pam_tmpdir.so
NOTE: This could allow for a DoS attack if a malicious user creates /tmp/user before pam_tmpdir does.