Title

System audit tool executables must not have extended ACLs. (Cat III impact)

Discussion

To prevent unauthorized access or manipulation of system audit logs, the tools for manipulating those logs must be protected.

Check Content

Verify the audit tools file permissions. The list of files should minimally include the following: audevent - Change/display event/system call status. audfilter - Load/clear/display the audit filtering policy. auditdp - Selectively read/write and convert/format the audit data. audisp - Display audit records. audomon - Audit file monitoring and size parameter setpoints. audsys - Start/stop auditing; set/display the audit file or directory information. userdbset - Select user to be audited. # ls -lL /usr/sbin/aud* /usr/sbin/userdb* If any audit tool file permissions include a “+”, this is a finding.

Fix Text

As root, change the file permissions. # chacl -z <audit_tool_filename>

Additional Identifiers

Rule ID: SV-26516r2_rule

Vulnerability ID: V-22373

Group Title: GEN002718

Expert Comments

CCIs tied to check.

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