Comment 2 for bug 2019214

This bug was fixed in the package postgresql-12 - 12.15-0ubuntu0.20.04.1

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postgresql-12 (12.15-0ubuntu0.20.04.1) focal-security; urgency=medium

  * New upstream version (LP: #2019214).

    + A dump/restore is not required for those running 12.X.

    + Also, if you are upgrading from a version earlier than 12.10, see
      those release notes as well please.

    + Prevent CREATE SCHEMA from defeating changes in search_path
      (Alexander Lakhin)

      Within a CREATE SCHEMA command, objects in the prevailing
      search_path, as well as those in the newly-created schema, would be
      visible even within a called function or script that attempted to set
      a secure search_path. This could allow any user having permission to
      create a schema to hijack the privileges of a security definer
      function or extension script.
      (CVE-2023-2454)

    + Enforce row-level security policies correctly after inlining a
      set-returning function (Stephen Frost, Tom Lane)

      If a set-returning SQL-language function refers to a table having
      row-level security policies, and it can be inlined into a calling
      query, those RLS policies would not get enforced properly in some
      cases involving re-using a cached plan under a different role. This
      could allow a user to see or modify rows that should have been
      invisible.
      (CVE-2023-2455)

    + Details about these and many further changes can be found at:
      https://www.postgresql.org/docs/12/release-12-15.html.

 -- Sergio Durigan Junior <email address hidden> Thu, 11 May 2023 15:58:10 -0400