AIX must configure the ttys value for all interactive users.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-215186 | AIX7-00-001025 | SV-215186r958498_rule | CCI-000778 | medium |
| Description | ||||
| A user's "ttys" attribute controls from which device(s) the user can authenticate and log in. If the "ttys" attribute is not specified, all terminals can access the user account. | ||||
| STIG | Date | |||
| IBM AIX 7.x Security Technical Implementation Guide | 2024-08-16 | |||
Details
Check Text (C-215186r958498_chk)
Verify that the default "ttys" value is set for all users:
# lssec -f /etc/security/user -s default -a ttys
default ttys=ALL
If the value returned is not "ttys=ALL", this is a finding.
From the command prompt, run the following command to check "ttys" attribute value for all accounts:
# lsuser -a ttys ALL
The above command should yield the following output:
root ttys=ALL
user1 ttys=ALL
user2 ttys=ALL
user3 ttys=ALL
If any interactive user account does not have "ttys=ALL", this is a finding.
Fix Text (F-16382r569436_fix)
From the command prompt, run the following command to set "ttys=ALL" for the default stanza in "/etc/security/user":
# chsec -f /etc/security/user -s default -a ttys=ALL
Run the following command to recheck "ttys" values for all users:
# lsuser -a ttys ALL
For each interactive user who does not have "ttys=ALL", set the value of "ttys" to "ALL" by running the following command from command prompt:
# chsec -f /etc/security/user -s [user_name] -a ttys=ALL