1. Ubuntu Security Notices
  2. USN-3390-1

USN-3390-1: PostgreSQL vulnerabilities

Publication date

15 August 2017

Overview

Several security issues were fixed in PostgreSQL.

Releases

Packages

Details

Ben de Graaff, Jelte Fennema, and Jeroen van der Ham discovered that
PostgreSQL allowed the use of empty passwords in some authentication
methods, contrary to expected behaviour. A remote attacker could use an
empty password to authenticate to servers that were believed to have
password login disabled. (CVE-2017-7546)

Jeff Janes discovered that PostgreSQL incorrectly handled the
pg_user_mappings catalog view. A remote attacker without server privileges
could possibly use this issue to obtain certain passwords. (CVE-2017-7547)

Chapman Flack discovered that PostgreSQL incorrectly handled lo_put()
permissions. A remote attacker could possibly use this issue to change the
data in a large object. (CVE-2017-7548)

Ben de Graaff, Jelte Fennema, and Jeroen van der Ham discovered that
PostgreSQL allowed the use of empty passwords in some authentication
methods, contrary to expected behaviour. A remote attacker could use an
empty password to authenticate to servers that were believed to have
password login disabled. (CVE-2017-7546)

Jeff Janes discovered that PostgreSQL incorrectly handled the
pg_user_mappings catalog view. A remote attacker without server privileges
could possibly use this issue to obtain certain passwords. (CVE-2017-7547)

Chapman Flack discovered that PostgreSQL incorrectly handled lo_put()
permissions. A remote attacker could possibly use this issue to change the
data in a large object. (CVE-2017-7548)

Update instructions

This update uses a new upstream release, which includes additional bug fixes. After a standard system update you need to restart PostgreSQL to make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
17.04 zesty postgresql-9.6 –  9.6.4-0ubuntu0.17.04.1
16.04 xenial postgresql-9.5 –  9.5.8-0ubuntu0.16.04.1
14.04 trusty postgresql-9.3 –  9.3.18-0ubuntu0.14.04.1

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References

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