Title

RHEL 9 must prohibit the use of cached authenticators 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If cached authentication information is out-of-date, the validity of the authentication information may be questionable.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 the System Security Services Daemon (SSSD) prohibits the use of cached authentications after one day. Note: Cached authentication settings should be configured even if smart card authentication is not used on the system. Check that SSSD allows cached authentications with the following command: $ sudo grep -ir cache_credentials /etc/sssd/sssd.conf /etc/sssd/conf.d/ cache_credentials = true If "cache_credentials" is set to "false" or missing from the configuration file, this is not a finding and no further checks are required. If "cache_credentials" is set to "true", check that SSSD prohibits the use of cached authentications after one day with the following command: $ sudo grep -ir offline_credentials_expiration /etc/sssd/sssd.conf /etc/sssd/conf.d/ offline_credentials_expiration = 1 If "offline_credentials_expiration" is not set to a value of "1", this is a finding.

Fix Text

Configure the SSSD to prohibit the use of cached authentications after one day. Edit the file "/etc/sssd/sssd.conf" or a configuration file in "/etc/sssd/conf.d" and add or edit the following line just below the line [pam]: offline_credentials_expiration = 1

Additional Identifiers

Rule ID: SV-258133r1045263_rule

Vulnerability ID: V-258133

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

Expert Comments

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