=========================================================================Ubuntu Security Notice USN-4194-1
November 14, 2019

postgresql-common vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 19.10
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

postgresql-common could be made to create arbitrary directories.

Software Description:
- postgresql-common: PostgreSQL database-cluster manager

Details:

Rich Mirch discovered that the postgresql-common pg_ctlcluster script
incorrectly handled directory creation. A local attacker could possibly use
this issue to escalate privileges.

Update instructions:

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

Ubuntu 19.10:
  postgresql-common               204ubuntu0.1

Ubuntu 19.04:
  postgresql-common               199ubuntu0.1

Ubuntu 18.04 LTS:
  postgresql-common               190ubuntu0.1

Ubuntu 16.04 LTS:
  postgresql-common               173ubuntu0.3

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-4194-1
  CVE-2019-3466

Package Information:
  https://launchpad.net/ubuntu/+source/postgresql-common/204ubuntu0.1
  https://launchpad.net/ubuntu/+source/postgresql-common/199ubuntu0.1
  https://launchpad.net/ubuntu/+source/postgresql-common/190ubuntu0.1
  https://launchpad.net/ubuntu/+source/postgresql-common/173ubuntu0.3