A postgresql-common security update has been released for Debian GNU/Linux 8 LTS to address a security issue with the pg_ctlcluster script

Package : postgresql-common
Version : 165+deb8u4
CVE ID : CVE-2019-3466

Rich Mirch discovered that the pg_ctlcluster script didn't drop
privileges when creating socket/statistics temporary directories, which
could result in local privilege escalation.

For the oldoldstable distribution (jessie), this problem has been fixed
in version 165+deb8u4.

We recommend that you upgrade your postgresql-common packages.

For the detailed security status of postgresql-common please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/postgresql-common