The klogin daemon must be disabled on AIX.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-215383	SRG-OS-000095-GPOS-00049	AIX7-00-003078	SV-215383r958478_rule	2024-08-16	3

Description
The klogin service offers a higher degree of security than traditional rlogin or telnet by eliminating most clear-text password exchanges on the network. However, it is still not as secure as SSH, which encrypts all traffic. If using klogin to log in to a system, the password is not sent in clear text; however, if using "su" to another user, that password exchange is open to detection from network-sniffing programs. The recommendation is to use SSH wherever possible instead of klogin. If the klogin service is used, use the latest Kerberos version available and make sure that all the latest patches are installed.

Description

The klogin service offers a higher degree of security than traditional rlogin or telnet by eliminating most clear-text password exchanges on the network. However, it is still not as secure as SSH, which encrypts all traffic. If using klogin to log in to a system, the password is not sent in clear text; however, if using "su" to another user, that password exchange is open to detection from network-sniffing programs. The recommendation is to use SSH wherever possible instead of klogin. If the klogin service is used, use the latest Kerberos version available and make sure that all the latest patches are installed.

ℹ️ Check
From the command prompt, execute the following command: # grep "^klogin[[:blank:]]" /etc/inetd.conf If there is any output from the command, this is a finding.

✔️ Fix
In "/etc/inetd.conf", comment out the "klogin" entry by running command: # chsubserver -r inetd -C /etc/inetd.conf -d -v 'klogin' -p 'tcp' Restart inetd: # refresh -s inetd