Title

The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the chsh command. (Cat II impact)

Discussion

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).

Check Content

Verify the Ubuntu operating system generates an audit record when successful/unsuccessful attempts to use the "chsh" command. Check the configured audit rules with the following commands: # sudo auditctl -l | grep chsh -a always,exit -F path=/usr/bin/chsh -F perm=x -F auid>=1000 -F auid!=-1 -k priv_cmd If the command does not return a line that matches the example or the line is commented out, this is a finding. Notes: The '-k' allows for specifying an arbitrary identifier and the string after it does not need to match the example output above.

Fix Text

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "chsh" command. Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F path=/usr/bin/chsh -F perm=x -F auid>=1000 -F auid!=4294967295 -k priv_cmd Note: The "root" account must be used to view/edit any files in the /etc/audit/rules.d/ directory. In order to reload the rules file, issue the following command: # sudo augenrules --load

Additional Identifiers

Rule ID: SV-219265r610963_rule

Vulnerability ID: V-219265

Group Title: SRG-OS-000064-GPOS-00033

Expert Comments

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