Title

RHEL 9 must encrypt via the gtls driver the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog. (Cat II impact)

Discussion

Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. RHEL 9 installation media provides "rsyslogd", a system utility providing support for message logging. Support for both internet and Unix domain sockets enables this utility to support both local and remote logging. Coupling this utility with "gnutls" (a secure communications library implementing the SSL, TLS and DTLS protocols) creates a method to securely encrypt and offload auditing. Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224

Check Content

Verify RHEL 9 uses the gtls driver to encrypt audit records offloaded onto a different system or media from the system being audited with the following command: $ grep -Ei 'DefaultNetStreamDriver\b|StreamDriver.Name' /etc/rsyslog.conf /etc/rsyslog.d/*.conf /etc/rsyslog.conf:$DefaultNetstreamDriver gtls If the value of the "$DefaultNetstreamDriver or StreamDriver" option is not set to "gtls" or the line is commented out, this is a finding. If the variable name "StreamDriver" is present in an omfwd statement block, this is not a finding. However, if the "StreamDriver" variable is in a module block, this is a finding.

Fix Text

Configure RHEL 9 to use the gtls driver to encrypt offloaded audit records by setting the following options in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf": $DefaultNetstreamDriver gtls

Additional Identifiers

Rule ID: SV-258148r1045292_rule

Vulnerability ID: V-258148

Group Title: SRG-OS-000342-GPOS-00133

Expert Comments

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