The system must disable accounts after three consecutive unsuccessful login attempts.

From SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide

Associated with: CCI-000044

SV-44834r1_rule The system must disable accounts after three consecutive unsuccessful login attempts.

Vulnerability discussion

Disabling accounts after a limited number of unsuccessful login attempts improves protection against password guessing attacks.

Check content

Check the pam_tally configuration. # more /etc/pam.d/login Confirm the following line is configured, before the "common-auth” file is included: auth required pam_tally.so deny=3 onerr=fail # more /etc/pam.d/sshd Confirm the following line is configured, before the "common-auth” file is included: auth required pam_tally.so deny=3 onerr=fail If no such line is found, this is a finding.

Fix text

Edit /etc/pam.d/login and/or /etc/pam.d/sshd and add the following line, before the "common-auth" file is included: auth required pam_tally.so deny=3 onerr=fail

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