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Category:   Application (Database)  >   PostgreSQL Vendors:   postgresql.org
(Red Hat Issues Fix) PostgreSQL Bugs Let Remote Users Deny Service and Let Remote Authenticated Users Gain Elevated Privileges
SecurityTracker Alert ID:  1035877
SecurityTracker URL:  http://securitytracker.com/id/1035877
CVE Reference:   CVE-2016-0773   (Links to External Site)
Date:  May 12 2016
Impact:   Denial of service via network, Modification of user information, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.1, 9.2, 9.3, 9.4, 9.5
Description:   Two vulnerabilities were reported in PostgreSQL. A remote user can cause the target service to crash. A remote authenticated user can gain elevated privileges.

A remote user can supply a specially data containing regular expressions with out-of-range Unicode characters to cause the target backend service to enter an infinite loop or crash [CVE-2016-0773].

A remote authenticated user without database superuser privileges can modify certain custom configuration settings (GUCS) for PL/Java [CVE-2016-0766].

Impact:   A remote user can cause the target service to enter an infinite loop or crash.

A remote authenticated user can gain elevated privileges on the target system.

Solution:   Red Hat has issued a fix for CVE-2016-0773 for postgresql92.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2016-1060.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2016-1060.html (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Feb 11 2016 PostgreSQL Bugs Let Remote Users Deny Service and Let Remote Authenticated Users Gain Elevated Privileges



 Source Message Contents

Subject:  [RHSA-2016:1060-01] Important: postgresql92-postgresql security update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: postgresql92-postgresql security update
Advisory ID:       RHSA-2016:1060-01
Product:           Red Hat Satellite
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-1060.html
Issue date:        2016-05-12
CVE Names:         CVE-2016-0773 
=====================================================================

1. Summary:

An update for postgresql92-postgresql is now available for Red Hat
Satellite 5.7.

Red Hat Product Security has rated this update as having a security impact
of Important. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available for each vulnerability
from the CVE link(s) in the References section.

2. Relevant releases/architectures:

Red Hat Satellite 5.7 (RHEL v.6) - s390x, x86_64
Red Hat Satellite Managed DB 5.7 (RHEL v.6) - s390x, x86_64

3. Description:

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

Security Fix(es):

* An integer overflow flaw, leading to a heap-based buffer overflow, was
found in the PostgreSQL handling code for regular expressions. A remote
attacker could use a specially crafted regular expression to cause
PostgreSQL to crash or possibly execute arbitrary code. (CVE-2016-0773)

Red Hat would like to thank PostgreSQL upstream for reporting this issue.
Upstream acknowledges Tom Lane and Greg Stark as the original reporters.

4. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

For this update to take effect, Red Hat Satellite must be restarted
("/usr/sbin/rhn-satellite restart"). If the postgresql service is running,
it will be automatically restarted after installing this update.

5. Bugs fixed (https://bugzilla.redhat.com/):

1303832 - CVE-2016-0773 postgresql: case insensitive range handling integer overflow leading to buffer overflow

6. Package List:

Red Hat Satellite Managed DB 5.7 (RHEL v.6):

Source:
postgresql92-postgresql-9.2.15-2.el6.src.rpm

s390x:
postgresql92-postgresql-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-contrib-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-debuginfo-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-libs-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-pltcl-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-server-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-upgrade-9.2.15-2.el6.s390x.rpm

x86_64:
postgresql92-postgresql-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-contrib-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-debuginfo-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-libs-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-pltcl-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-server-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-upgrade-9.2.15-2.el6.x86_64.rpm

Red Hat Satellite 5.7 (RHEL v.6):

Source:
postgresql92-postgresql-9.2.15-2.el6.src.rpm

s390x:
postgresql92-postgresql-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-contrib-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-debuginfo-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-libs-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-pltcl-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-server-9.2.15-2.el6.s390x.rpm
postgresql92-postgresql-upgrade-9.2.15-2.el6.s390x.rpm

x86_64:
postgresql92-postgresql-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-contrib-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-debuginfo-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-libs-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-pltcl-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-server-9.2.15-2.el6.x86_64.rpm
postgresql92-postgresql-upgrade-9.2.15-2.el6.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2016-0773
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2016 Red Hat, Inc.
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