Access to external executables must be disabled or restricted.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-68943	PPS9-00-004000	SV-83547r1_rule		Medium

Description
Information systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). It is detrimental for applications to provide, or install by default, functionality exceeding requirements or mission objectives. Applications must adhere to the principles of least functionality by providing only essential capabilities. DBMSs may spawn additional external processes to execute procedures that are defined in the DBMS but stored in external host files (external procedures). The spawned process used to execute the external procedure may operate within a different OS security context than the DBMS and provide unauthorized access to the host system.

Description

Information systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions). It is detrimental for applications to provide, or install by default, functionality exceeding requirements or mission objectives. Applications must adhere to the principles of least functionality by providing only essential capabilities. DBMSs may spawn additional external processes to execute procedures that are defined in the DBMS but stored in external host files (external procedures). The spawned process used to execute the external procedure may operate within a different OS security context than the DBMS and provide unauthorized access to the host system.

STIG	Date
EDB Postgres Advanced Server Security Technical Implementation Guide	2017-02-28

Details

Check Text ( C-69415r1_chk )
Run the following command as root: yum list installed \| grep ppas If any packages are installed that are not needed, this is a finding.

Fix Text (F-75127r1_fix)
Review the EDB PPAS packages available in the installation guide here: http://www.enterprisedb.com/docs/en/9.5/instguide/Postgres_Plus_Advanced_Server_Installation_Guide.1.14.html# Uninstall any unneeded packages by running the following as root: #> yum erase -y At a minimum, the ppas94-server-* packages are required, but other packages such as jdbc, postgis, pgpool and others may be required by applications that need the functionality provided in these additional packages

Fix Text (F-75127r1_fix)

Review the EDB PPAS packages available in the installation guide here:

http://www.enterprisedb.com/docs/en/9.5/instguide/Postgres_Plus_Advanced_Server_Installation_Guide.1.14.html#

Uninstall any unneeded packages by running the following as root:

#> yum erase -y

At a minimum, the ppas94-server-* packages are required, but other packages such as jdbc, postgis, pgpool and others may be required by applications that need the functionality provided in these additional packages