The EDB Postgres Advanced Server must protect its audit features from unauthorized access.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-68919	PPS9-00-002900	SV-83523r1_rule		Medium

Description
Protecting audit data also includes identifying and protecting the tools used to view and manipulate log data. Depending upon the log format and application, system and application log tools may provide the only means to manipulate and manage application and system log data. It is, therefore, imperative that access to audit tools be controlled and protected from unauthorized access. Applications providing tools to interface with audit data will leverage user permissions and roles identifying the user accessing the tools and the corresponding rights the user enjoys in order make access decisions regarding the access to audit tools. Audit tools include, but are not limited to, OS-provided audit tools, vendor-provided audit tools, and open source audit tools needed to successfully view and manipulate audit information system activity and records. If an attacker were to gain access to audit tools, he could analyze audit logs for system weaknesses or weaknesses in the auditing itself. An attacker could also manipulate logs to hide evidence of malicious activity.

Description

Protecting audit data also includes identifying and protecting the tools used to view and manipulate log data. Depending upon the log format and application, system and application log tools may provide the only means to manipulate and manage application and system log data. It is, therefore, imperative that access to audit tools be controlled and protected from unauthorized access. Applications providing tools to interface with audit data will leverage user permissions and roles identifying the user accessing the tools and the corresponding rights the user enjoys in order make access decisions regarding the access to audit tools. Audit tools include, but are not limited to, OS-provided audit tools, vendor-provided audit tools, and open source audit tools needed to successfully view and manipulate audit information system activity and records. If an attacker were to gain access to audit tools, he could analyze audit logs for system weaknesses or weaknesses in the auditing itself. An attacker could also manipulate logs to hide evidence of malicious activity.

STIG	Date
EDB Postgres Advanced Server Security Technical Implementation Guide	2020-03-06

Details

Check Text ( C-69389r1_chk )
Verify User ownership, Group ownership, and permissions on the “edb_audit” directory: > ls –ald /edb_audit If the User owner is not “enterprisedb”, this is a finding If the Group owner is not “enterprisedb”, this is a finding. If the directory is more permissive than 700, this is a finding. (The default path for the postgresql data directory is /var/lib/ppas/9.5/data, but this will vary according to local circumstances.)

Check Text ( C-69389r1_chk )

Verify User ownership, Group ownership, and permissions on the “edb_audit” directory:
> ls –ald /edb_audit
If the User owner is not “enterprisedb”, this is a finding
If the Group owner is not “enterprisedb”, this is a finding.
If the directory is more permissive than 700, this is a finding.

(The default path for the postgresql data directory is /var/lib/ppas/9.5/data, but this will vary according to local circumstances.)

Fix Text (F-75101r1_fix)
Run these commands: 1) "chown enterprisedb /edb_audit" 2) "chgrp enterprisedb /edb_audit" 3) "chmod 700 /edb_audit" (The default path for the postgresql data directory is /var/lib/ppas/9.5/data, but this will vary according to local circumstances.)