The SLES for vRealize must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period.

From VMware vRealize Operations Manager 6.x SLES Security Technical Implementation Guide

Associated with: CCI-000044

SV-99011r1_rule The SLES for vRealize must enforce the limit of three consecutive invalid logon attempts by a user during a 15-minute time period.

Vulnerability discussion

By limiting the number of failed logon attempts, the risk of unauthorized system access via user password guessing, otherwise known as brute-force attacks, is reduced. Limits are imposed by locking the account.

Check content

Run the following command to ensure that the SLES for vRealize enforces the limit of "3" consecutive invalid logon attempts by a user: # grep pam_tally2.so /etc/pam.d/common-auth The output should contain "deny=3" in the returned line. If the output does not contain "deny=3", this is a finding. Expected Result: auth required pam_tally2.so deny=3 onerr=fail even_deny_root unlock_time=86400 root_unlock_time=300

Fix text

To configure the SLES for vRealize to enforce the limit of "3" consecutive invalid attempts using "pam_tally2.so", modify the content of the /etc/pam.d/common-auth-vmware.local by running the following command: # sed -i "/^[^#]*pam_tally2.so/ c\auth required pam_tally2.so deny=3 onerr=fail even_deny_root unlock_time=86400 root_unlock_time=300" /etc/pam.d/common-auth-vmware.local

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