Title

AIX audit tools must be group-owned by audit. (Cat II impact)

Discussion

Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. Operating systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing the tools and the corresponding rights the user enjoys in order to make access decisions regarding the access to audit tools. Audit tools include, but are not limited to, vendor-provided and open source audit tools needed to successfully view and manipulate audit information system activity and records. Audit tools include custom queries and report generators. Satisfies: SRG-OS-000256-GPOS-00097, SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099

Check Content

Check the following audit tools are group-owned by "audit": /usr/sbin/audit /usr/sbin/auditbin /usr/sbin/auditcat /usr/sbin/auditconv /usr/sbin/auditmerge /usr/sbin/auditpr /usr/sbin/auditselect /usr/sbin/auditstream # ls -l /usr/sbin/audit*|grep -v ldap -r-sr-x--- 1 root audit 64926 Mar 30 2016 /usr/sbin/audit -r-sr-x--- 1 root audit 41240 Mar 30 2016 /usr/sbin/auditbin -r-sr-x--- 1 root audit 40700 Mar 30 2016 /usr/sbin/auditcat -r-sr-x--- 1 root audit 13072 Mar 30 2016 /usr/sbin/auditconv -r-sr-x--- 1 root audit 11328 Mar 30 2016 /usr/sbin/auditmerge -r-sr-x--- 1 root audit 53466 Mar 30 2016 /usr/sbin/auditpr -r-sr-x--- 1 root audit 33128 Mar 30 2016 /usr/sbin/auditselect -r-sr-x--- 1 root audit 29952 Mar 30 2016 /usr/sbin/auditstream If any above file's are not group-owned by "audit", this is a finding. Verify that "/usr/sbin/auditldap" group-owned by "security": # ls -l /usr/sbin/auditldap -r-x------ 1 root security 12204 Mar 30 2016 /usr/sbin/auditldap If the group-owner of "/usr/sbin/auditldap" is not "security", this is a finding.

Fix Text

For each audit tool in: /usr/sbin/audit /usr/sbin/auditbin /usr/sbin/auditcat /usr/sbin/auditconv /usr/sbin/auditmerge /usr/sbin/auditpr /usr/sbin/auditselect /usr/sbin/auditstream Set the group to "audit". # chgrp audit <audit tool> For /usr/sbin/auditldap: Set the group to "security". # chgrp security /usr/sbin/auditldap

Additional Identifiers

Rule ID: SV-215249r991557_rule

Vulnerability ID: V-215249

Group Title: SRG-OS-000256-GPOS-00097

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.