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The Ubuntu operating system must implement smart card logins for multifactor authentication for access to accounts.


Finding ID Version Rule ID IA Controls Severity
V-219317 UBTU-18-010427 SV-219317r853385_rule Medium
Without the use of multifactor authentication, the ease of access to privileged functions is greatly increased. Multifactor authentication requires using two or more factors to achieve authentication. Factors include: 1) something a user knows (e.g., password/PIN); 2) something a user has (e.g., cryptographic identification device, token); and 3) something a user is (e.g., biometric). A privileged account is defined as an information system account with authorizations of a privileged user. Network access is defined as access to an information system by a user (or a process acting on behalf of a user) communicating through a network (e.g., local area network, wide area network, or the Internet). The DoD CAC with DoD-approved PKI is an example of multifactor authentication. Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000377-GPOS-00162
Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide 2022-12-06


Check Text ( C-21042r305279_chk )
Verify the Ubuntu operating system uses multifactor authentication for local access to accounts.

Check that the "pam_pkcs11.so" option is configured in the "/etc/pam.d/common-auth" file with the following command:

# grep pam_pkcs11.so /etc/pam.d/common-auth
auth [success=2 default=ignore] pam_pkcs11.so

If "pam_pkcs11.so" is not set in "/etc/pam.d/common-auth", this is a finding.
Fix Text (F-21041r305280_fix)
Configure the Ubuntu operating system to use multifactor authentication for local access to accounts.

Add or update "pam_pkcs11.so" in "/etc/pam.d/common-auth" to match the following line:

auth [success=2 default=ignore] pam_pkcs11.so