The Ubuntu operating system must generate records for successful/unsuccessful uses of delete_module syscall and when unloading dynamic kernel modules.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-219297	UBTU-18-010388	SV-219297r648694_rule		Medium

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). Satisfies: SRG-OS-000064-GPOS-00033, SRG-OS-000471-GPOS-00216

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). Satisfies: SRG-OS-000064-GPOS-00033, SRG-OS-000471-GPOS-00216

STIG	Date
Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide	2021-06-16

Details

Check Text ( C-21022r305219_chk )
Verify if the Ubuntu operating system is configured to audit the "delete_module" syscall, by running the following command: # sudo auditctl -l \| egrep delete_module -a always,exit -F arch=b64 -S delete_module -F key=modules -a always,exit -F arch=b32 -S delete_module -F key=modules If the command does not return lines that match the example or the lines are commented out, this is a finding. Notes: For 32-bit architectures, only the 32-bit specific output lines from the commands are required. The '-k' allows for specifying an arbitrary identifier and the string after it does not need to match the example output above.

Check Text ( C-21022r305219_chk )

Verify if the Ubuntu operating system is configured to audit the "delete_module" syscall, by running the following command:

# sudo auditctl -l | egrep delete_module

-a always,exit -F arch=b64 -S delete_module -F key=modules
-a always,exit -F arch=b32 -S delete_module -F key=modules

If the command does not return lines that match the example or the lines are commented out, this is a finding.

Notes:
For 32-bit architectures, only the 32-bit specific output lines from the commands are required.
The '-k' allows for specifying an arbitrary identifier and the string after it does not need to match the example output above.

Fix Text (F-21021r305220_fix)
Configure the Ubuntu operating system to generate an audit event for any use of the delete_module system call. Add or update the following rule in the "/etc/audit/rules.d/stig.rules" file. -a always,exit -F arch=b32 -S delete_module -F key=modules -a always,exit -F arch=b64 -S delete_module -F key=modules Notes: For 32-bit architectures, only the 32-bit specific entries are required. 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

Fix Text (F-21021r305220_fix)

Configure the Ubuntu operating system to generate an audit event for any use of the delete_module system call.

Add or update the following rule in the "/etc/audit/rules.d/stig.rules" file.

-a always,exit -F arch=b32 -S delete_module -F key=modules
-a always,exit -F arch=b64 -S delete_module -F key=modules

Notes: For 32-bit architectures, only the 32-bit specific entries are required.
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