Title

SLEM 5 must configure the Linux Pluggable Authentication Modules (PAM) to prohibit the use of cached offline authentications after one day. (Cat II impact)

Discussion

If cached authentication information is out of date, the validity of the authentication information may be questionable.

Check Content

Verify that SLEM 5 PAM prohibits the use of cached off line authentications after one day with the following command: Note: If SSSD is not being used on the operating system, this is not applicable. > sudo grep "offline_credentials_expiration" /etc/sssd/sssd.conf offline_credentials_expiration = 1 If "offline_credentials_expiration" is not set to a value of "1", the line is commented out, or the line is missing, this is a finding.

Fix Text

Configure SLEM 5 PAM to prohibit the use of cached authentications after one day. Add or modify the following line in the "/etc/sssd/sssd.conf" file, below the line "[pam]": offline_credentials_expiration = 1

Additional Identifiers

Rule ID: SV-261400r996619_rule

Vulnerability ID: V-261400

Group Title: SRG-OS-000383-GPOS-00166

Expert Comments

CCIs tied to check.

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