Consecutive login attempts for SSH must be limited to 3.

From Solaris 11 SPARC Security Technical Implementation Guide

Associated with: CCI-000366

SV-60971r1_rule Consecutive login attempts for SSH must be limited to 3.

Vulnerability discussion

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.

Check content

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

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.

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