[USN-6656-2] PostgreSQL vulnerability

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==========================================================================
Ubuntu Security Notice USN-6656-2
March 12, 2024

postgresql-9.5 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 16.04 LTS (Available with Ubuntu Pro)

Summary:

PostgreSQL could be made to run arbitrary SQL.

Software Description:
- postgresql-9.5: Object-relational SQL database

Details:

USN-6656-1 fixed several vulnerabilities in PostgreSQL. This update provides
the corresponding updates for Ubuntu 16.04 LTS

Original advisory details:

It was discovered that PostgreSQL incorrectly handled dropping privileges
when handling REFRESH MATERIALIZED VIEW CONCURRENTLY commands. If a user or
automatic system were tricked into running a specially crafted command, a
remote attacker could possibly use this issue to execute arbitrary SQL
functions.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
postgresql-9.5 9.5.25-0ubuntu0.16.04.1+esm7
postgresql-client-9.5 9.5.25-0ubuntu0.16.04.1+esm7

After a standard system update you need to restart PostgreSQL to make all
the necessary changes.

References:
https://ubuntu.com/security/notices/USN-6656-2
https://ubuntu.com/security/notices/USN-6656-1
CVE-2024-0985