Debian DSA-3935-1: Critical PostgreSQL Authentication Flaws And Updates

Several vulnerabilities have been found in the PostgreSQL database
system:

CVE-2017-7546

In some authentication methods empty passwords were accepted.

CVE-2017-7547

User mappings could leak data to unprivileged users.

CVE-2017-7548

The lo_put() function ignored ACLs.

For more in-depth descriptions of the security vulnerabilities,
please see https://https://www.postgresql.org/about/news/postgresql-anonymizer-06-pseudonymization-and-improved-anonymous-exports-2017/

For the oldstable distribution (jessie), these problems have been fixed
in version 9.4.13-0+deb8u1.

We recommend that you upgrade your postgresql-9.4 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/