Disable Telnet Service

HighLevel 1Automatedsolaris

Description

The telnet daemon, which accepts connections from users from other systems via the telnet protocol and can be used for remote shell access. The telnet protocol is insecure and unencrypted. The use of an unencrypted transmission medium could allow a user with access to sniff network traffic the ability to steal credentials. The ssh protocol provides an encrypted session and stronger security. Audit: `svcs -Ho state` must report disabled; a service that is not installed is compliant.

How it is checked

Audit method: Shell command

shell

command -v svcs >/dev/null 2>&1 || exit 1; r=compliant; for f in svc:/network/telnet; do st=$(svcs -Ho state "$f" 2>/dev/null); case "$st" in ''|disabled) ;; *) r="$f: $st";; esac; done; echo "$r"

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

svcadm disable svc:/network/telnet

Properties

Operating systems: Any
Tags: solarisnetwork
Reference: CIS Oracle Solaris 11.4 Benchmark v1.1.0 - 2.12 Disable Telnet Service

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target solaris