rh-postgresql95-postgresql-9.5.9-1.AXS4

PostgreSQL is an advanced object-relational database management system (DBMS).

The following packages have been upgraded to a later upstream version: rh-
postgresql95-postgresql (9.5.9). (BZ#1484637, BZ#1484642, BZ#1484648)

Security Fix(es):

* It was found that authenticating to a PostgreSQL database account with an
empty password was possible despite libpq's refusal to send an empty password. A
remote attacker could potentially use this flaw to gain access to database
accounts with empty passwords. (CVE-2017-7546)

* An authorization flaw was found in the way PostgreSQL handled access to the
pg_user_mappings view on foreign servers. A remote, authenticated attacker could
potentially use this flaw to retrieve passwords from the user mappings defined
by the foreign server owners without actually having the privileges to do so.
(CVE-2017-7547)

* An authorization flaw was found in the way PostgreSQL handled large objects.
A remote, authenticated attacker with no privileges on a large object could
potentially use this flaw to overwrite the entire content of the object, thus
resulting in denial of service. (CVE-2017-7548)

Asianux would like to thank the PostgreSQL project for reporting these issues.
Upstream acknowledges Ben de Graaff, Jelte Fennema, and Jeroen van der Ham as
the original reporters of CVE-2017-7546; Jeff Janes as the original reporter
of CVE-2017-7547; and Chapman Flack as the original reporter of CVE-2017-7548.

CVE-2017-7546
PostgreSQL versions before 9.2.22, 9.3.18, 9.4.13, 9.5.8 and 9.6.4 are
vulnerable to incorrect authentication flaw allowing remote attackers
to gain access to database accounts with an empty password.
CVE-2017-7547
PostgreSQL versions before 9.2.22, 9.3.18, 9.4.13, 9.5.8 and 9.6.4 are
vulnerable to authorization flaw allowing remote authenticated
attackers to retrieve passwords from the user mappings defined by the
foreign server owners without actually having the privileges to do so.
CVE-2017-7548
PostgreSQL versions before 9.4.13, 9.5.8 and 9.6.4 are vulnerable to
authorization flaw allowing remote authenticated attackers with no
privileges on a large object to overwrite the entire contents of the
object, resulting in a denial of service.