Title

Access to external executables must be disabled or restricted. (Cat II impact)

Discussion

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.

Check Content

Run the following command as the "root" user: > yum list installed | grep edb- If any packages are installed that are not required, this is a finding.

Fix Text

Review the EDB Postgres Advanced Server packages available in the installation guide here: https://www.enterprisedb.com/docs/epas/<version number>/ Uninstall all packages that are not required by running the following as the "root" user: > yum erase -y <package-name> At a minimum, the edb-as<version>-server-* packages are required. Additionally, other packages such as pem, jdbc, postgis, pgpool, and others may be required by applications that need the functionality provided in these additional packages.

Additional Identifiers

Rule ID: SV-259243r938782_rule

Vulnerability ID: V-259243

Group Title: SRG-APP-000141-DB-000093

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.