postgresql-10, postgresql-12, postgresql-9.5 vulnerabilities

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

* Ubuntu 20.04 LTS
* Ubuntu 18.04 LTS
* Ubuntu 16.04 LTS

Summary

Several security issues were fixed in PostgreSQL.

Software Description

* postgresql-12 - Object-relational SQL database
* postgresql-10 - Object-relational SQL database
* postgresql-9.5 - Object-relational SQL database

Details

Noah Misch discovered that PostgreSQL incorrectly handled the
search_path setting when used with logical replication. A remote
attacker could possibly use this issue to execute arbitrary SQL
code. This issue only affected Ubuntu 18.04 LTS and Ubuntu 20.04
LTS. (CVE-2020-14349)

Andres Freund discovered that PostgreSQL incorrectly handled
search path elements in CREATE EXTENSION. A remote attacker could
possibly use this issue to execute arbitrary SQL code.
(CVE-2020-14350)

Update instructions

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

Ubuntu 20.04 LTS
postgresql-12 - 12.4-0ubuntu0.20.04.1

Ubuntu 18.04 LTS
postgresql-10 - 10.14-0ubuntu0.18.04.1

Ubuntu 16.04 LTS
postgresql-9.5 - 9.5.23-0ubuntu0.16.04.1

To update your system, please follow these instructions:
https://wiki.ubuntu.com/Security/Upgrades.

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

* CVE-2020-14349
* CVE-2020-14350

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