Puppet controls are Puppet defined types that ensure a certain security control is implemented. Puppet changes the system in order to make the system compliant.

Description of the control

A communication exit library is a dynamically loaded library that vendor applications use to examine communication buffers. The comm_exit_list parameter specifies the list of communication buffer exist libraries. The permissions on the libraries should be secured so that users other than the instance owner do not have write privileges.


If a malicious user has write access to a communication exit library, they can overwrite it with their own thereby receiving all of the communication buffers that Db2 receives over the network. Securing the libraries will prevent a loss of confidentiality of data.


To deliberately skip this control (e.g. meaning don’t use Puppet to enforce this setting), we provide you with two ways:

1) Add db2_secured::controls::secure_the_communication_buffer_exit_library: skip to your hiera data. This will skip this control for ALL systems.
3) Add an entry with the content secure_the_communication_buffer_exit_library to the array value db2_secured::skip_list in your hiera data.


This control is used in the following benchmarks:


Attribute Name Short Description
title The database identifier to apply the control to.


The database identifier to apply the control to.

All controls need an database identifier to apply the control to. Here is a simple example:

db2_secured::controls::control_name { 'db2inst1/MYDB':}

In this example, the string dbinst1 is the instance, the string MYDB is the database to apply the control to.

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