Successful/unsuccessful uses of the "unix_update" in TOSS must generate an audit record.
An XCCDF Rule
Description
Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). "unix_update" is a helper program for the "pam_unix" module that updates the password for a given user. It is not intended to be run directly from the command line and logs a security violation if done so.
- ID
- SV-253046r991579_rule
- Version
- TOSS-04-031200
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "unix_update" by adding or updating the following rule in the "/etc/audit/rules.d/audit.rules" file:
-a always,exit -F path=/usr/sbin/unix_update -F perm=x -F auid>=1000 -F auid!=unset -k privileged
The audit daemon must be restarted for the changes to take effect.