The telnet daemon must not be running.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-24386	GEN003850	SV-64021r1_rule		High

Description
The telnet daemon provides a typically unencrypted remote access service which does not provide for the confidentiality and integrity of user passwords or the remote session. If a privileged user were to log on using this service, the privileged user password could be compromised.

STIG	Date
Oracle Linux 5 Security Technical Implementation Guide	2017-05-18

Details

Check Text ( C-52607r1_chk )
The telnet service included in the operating system is a part of krb5-workstation. There are two versions of telnetd server provided. The xinetd.d file ekrb5-telnet allows only connections authenticated through Kerberos. The xinetd.d krb5-telnet allows normal telnet connections as well as kerberized connections. Both are set to "disable = yes" by default. Ensure that neither is running. Procedure: Check if telnetd is running: # ps -ef \|grep telnetd If the telnet daemon is running, this is a finding. Check if telnetd is enabled on startup: # chkconfig --list\|grep telnet If an entry with "on" is found, this is a finding.

Check Text ( C-52607r1_chk )

The telnet service included in the operating system is a part of krb5-workstation. There are two versions of telnetd server provided. The xinetd.d file ekrb5-telnet allows only connections authenticated through Kerberos. The xinetd.d krb5-telnet allows normal telnet connections as well as kerberized connections. Both are set to "disable = yes" by default. Ensure that neither is running.

Procedure:
Check if telnetd is running:

# ps -ef |grep telnetd

If the telnet daemon is running, this is a finding.

Check if telnetd is enabled on startup:

# chkconfig --list|grep telnet

If an entry with "on" is found, this is a finding.

Fix Text (F-54723r2_fix)
Identify the telnet service running and disable it. Procedure: Disable the telnet server. # chkconfig telnet off Verify the telnet daemon is no longer running. # ps -ef \|grep telnet