Ensure the correct messages are written to the server log

MediumLevel 1Automatedpostgres

Description

The log_min_messages setting specifies the message levels that are written to the server log. Each level includes all the levels that follow it. The lower the level (vertically, below), the fewer messages are logged. Passes when log_min_messages is warning or a more verbose level. Runs psql as ${PGUSER:-postgres} against ${PGDATABASE:-postgres}; set PGHOST/PGPORT and use ~/.pgpass (not PGPASSWORD, see 1.6/1.7) when peer authentication is not available.

How it is checked

Audit method: SQL query

sql_query

out=$(psql -X -U "${PGUSER:-postgres}" -d "${PGDATABASE:-postgres}" -tAc "SELECT CASE WHEN lower(current_setting('log_min_messages')) IN ('debug5','debug4','debug3','debug2','debug1','info','notice','warning') THEN 'compliant' ELSE 'noncompliant' END" 2>/dev/null) || exit 1; printf '%s\n' "$out"

Expected output: compliant

How it is fixed

Fix method: SQL statement

shell

psql -X -U "${PGUSER:-postgres}" -c "ALTER SYSTEM SET log_min_messages = 'warning'" -c "SELECT pg_reload_conf()"

Properties

Operating systems: Any
Tags: postgresdatabaselogging
Reference: CIS PostgreSQL 18 Benchmark v1.0.0 - 3.1.14 Ensure the correct messages are written to the server log

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target postgres