Consecutive login attempts for SSH must be limited to 3.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-48099	SOL-11.1-040340	SV-60971r1_rule		Low

Description
Setting the authentication login limit to a low value will disconnect the attacker and force a reconnect, which severely limits the speed of such brute-force attacks.

STIG	Date
Solaris 11 X86 Security Technical Implementation Guide	2018-04-10

Details

Check Text ( C-50531r1_chk )
Determine if consecutive login attempts are limited to 3. # grep "^MaxAuthTries" /etc/ssh/sshd_config If the output of this command is not: MaxAuthTries 6 MaxAuthTriesLog 6 this is a finding. Note: Solaris SSH MaxAuthTries of 6 maps to 3 actual failed attempts.

Fix Text (F-51707r1_fix)
The root role is required. Modify the sshd_config file. # pfedit /etc/ssh/sshd_config Locate the line containing: MaxAuthTries Change it to: MaxAuthTries 6 Restart the SSH service. # svcadm restart svc:/network/ssh Note: Solaris SSH MaxAuthTries of 6 maps to 3 actual failed attempts.