Title

The audit information produced by the EDB Postgres Advanced Server must be protected from unauthorized read access. (Cat II impact)

Discussion

If audit data were to become compromised, then competent forensic analysis and discovery of the true source of potentially malicious system activity is difficult, if not impossible, to achieve. In addition, access to audit records provides information an attacker could potentially use to his or her advantage. To ensure the veracity of audit data, the information system and/or the application must protect audit information from any and all unauthorized access. This includes read, write, copy, etc. This requirement can be achieved through multiple methods which will depend upon system architecture and design. Some commonly employed methods include ensuring log files enjoy the proper file system permissions utilizing file system protections and limiting log data location. Additionally, applications with user interfaces to audit records should not allow for the unfettered manipulation of or access to those records via the application. If the application provides access to the audit data, the application becomes accountable for ensuring that audit information is protected from unauthorized access. Audit information includes all information (e.g., audit records, audit settings, and audit reports) needed to successfully audit information system activity.

Check Content

Verify User ownership, Group ownership, and permissions on the "edb_audit" directory: > ls -ld <path-to-data-directory>/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 edb_audit directory is /var/lib/edb/as<version>/data (PGDATA), but this will vary according to local circumstances.

Fix Text

Run these commands as the "root" user (or user with sudo privileges) from the EDB Postgres Advanced Server data (PGDATA) directory: > chown enterprisedb edb_audit > chgrp enterprisedb edb_audit > chmod 700 edb_audit The default path for the edb_audit directory is /var/lib/edb/as<version>/data (PGDATA), but this will vary according to local circumstances.

Additional Identifiers

Rule ID: SV-259228r938737_rule

Vulnerability ID: V-259228

Group Title: SRG-APP-000118-DB-000059

Expert Comments

CCIs tied to check.

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