USN-4090-1: PostgreSQL vulnerabilities

Publication date

9 August 2019

Overview

Several security issues were fixed in PostgreSQL.


Packages

Details

Tom Lane discovered that PostgreSQL did not properly restrict
functions declared as “SECURITY DEFINER”. An attacker could use this
to execute arbitrary SQL with the permissions of the function owner.
(CVE-2019-10208)

Andreas Seltenreich discovered that PostgreSQL did not properly handle
user-defined hash equality operators. An attacker could use this to
expose sensitive information (arbitrary PostgreSQL server memory). This
issue only affected Ubuntu 19.04. (CVE-2019-10209)

Tom Lane discovered that PostgreSQL did not properly restrict
functions declared as “SECURITY DEFINER”. An attacker could use this
to execute arbitrary SQL with the permissions of the function owner.
(CVE-2019-10208)

Andreas Seltenreich discovered that PostgreSQL did not properly handle
user-defined hash equality operators. An attacker could use this to
expose sensitive information (arbitrary PostgreSQL server memory). This
issue only affected Ubuntu 19.04. (CVE-2019-10209)

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
19.04 disco postgresql-11 –  11.5-0ubuntu0.19.04.1
18.04 bionic postgresql-10 –  10.10-0ubuntu0.18.04.1
16.04 xenial postgresql-9.5 –  9.5.19-0ubuntu0.16.04.1

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