Title

The operating system must protect the audit records resulting from non-local accesses to privileged accounts and the execution of privileged functions. (Cat II impact)

Discussion

Protection of audit records and audit data is of critical importance. Care must be taken to ensure privileged users cannot circumvent audit protections put in place. Auditing might not be reliable when performed by an operating system which the user being audited has privileged access to. The privileged user could inhibit auditing or directly modify audit records. To prevent this from occurring, privileged access shall be further defined between audit-related privileges and other privileges, thus limiting the users with audit-related privileges.

Check Content

The audit configuration profile is required. This check applies to the global zone only. Determine the zone that you are currently securing. # zonename If the command output is "global", this check applies. Determine the location of the local audit trail files. # auditconfig -getplugin audit_binfile Plugin: audit_binfile (active) Attributes: p_dir=/var/audit;p_fsize=4M;p_minfree=1;" In this example, the audit files can be found in /var/audit. Check that the permissions on the audit files are 640 (rw- r-- --) or less permissive. # ls -al /var/audit # ls -l /var/audit/* If the permissions are more permissive than 640, this is a finding. Note: The default Solaris 11 location for /var/audit is a link to /var/share/audit.

Fix Text

The root role is required. Determine the location of the local audit trail files. # pfexec auditconfig -getplugin audit_binfile Plugin: audit_binfile (active) Attributes: p_dir=/var/audit;p_fsize=4M;p_minfree=1 In this example, the audit files can be found in /var/audit. Change the permissions on the audit trail files and the audit directory. # chmod 640 /var/share/audit/* # chmod 750 /var/share/audit Note: The default Solaris 11 location for /var/audit is a link to /var/share/audit.

Additional Identifiers

Rule ID: SV-220013r854571_rule

Vulnerability ID: V-220013

Group Title: SRG-OS-000327

Expert Comments

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