For Debian 9 stretch, this problem has been fixed in version
9.6.19-0+deb9u1.
We recommend that you upgrade your posgresql-9.6 packages.
For the detailed security status of posgresql-9.6 please refer to
its security tracker page at:
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
Get the latest Linux and open source security news straight to your inbox.