A PostgreSQL security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, 21.04, and 21.10.

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Ubuntu Security Notice USN-5145-1
November 11, 2021

postgresql-10, postgresql-12, postgresql-13 vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 21.04
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

PostgreSQL could allow unintended access to network services.

Software Description:
- postgresql-13: Object-relational SQL database
- postgresql-12: Object-relational SQL database
- postgresql-10: Object-relational SQL database

Details:

Jacob Champion discovered that PostgreSQL incorrectly handled SSL
certificate verification and encryption. A remote attacker could possibly
use this issue to inject arbitrary SQL queries when a connection is first
established.

Update instructions:

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

Ubuntu 21.10:
postgresql-13 13.5-0ubuntu0.21.10.1

Ubuntu 21.04:
postgresql-13 13.5-0ubuntu0.21.04.1

Ubuntu 20.04 LTS:
postgresql-12 12.9-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
postgresql-10 10.19-0ubuntu0.18.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart PostgreSQL to
make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-5145-1
CVE-2021-23214, CVE-2021-23222

Package Information:
  https://launchpad.net/ubuntu/+source/postgresql-13/13.5-0ubuntu0.21.10.1
  https://launchpad.net/ubuntu/+source/postgresql-13/13.5-0ubuntu0.21.04.1
  https://launchpad.net/ubuntu/+source/postgresql-12/12.9-0ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/postgresql-10/10.19-0ubuntu0.18.04.1