PostgreSQL 10.3, 9.6.8, 9.5.12, 9.4.17, and 9.3.22:
The purpose of this release is to address CVE-2018-1058, which describes how a user can create like-named objects in different schemas that can change the behavior of other users' queries and cause unexpected or malicious behavior, also known as a "trojan-horse" attack. Most of this release centers around added documentation that describes the issue and how to take steps to mitigate the impact on PostgreSQL databases.
The PostgreSQL Global Development Group has released an update to all supported versions of our database system, including 10.1, 9.6.6, 9.5.10, 9.4.15, 9.3.20, and 9.2.24. This release fixes three security issues. This release also fixes issues found in BRIN indexing, logical replication and other bugs reported over the past three months.
All users using the affected versions of PostgreSQL should update as soon as possible. If you use BRIN indexes or contrib/start-scripts, please see the release notes for additional post-upgrade steps.
Security Issues
Three security vulnerabilities have been fixed by this release:
CVE-2017-12172: Start scripts permit database administrator to modify root-owned files
CVE-2017-15098: Memory disclosure in JSON functions
CVE-2017-15099: INSERT ... ON CONFLICT DO UPDATE fails to enforce SELECT privileges
Bug Fixes and Improvements
This update also fixes a number of bugs reported in the last few months. Some of these issues affect only version 10, but many affect all supported versions:
Fix a race condition in BRIN indexing that could cause some rows to not be included in the indexing.
Fix crash when logical decoding is invoked from a PL language function.
Several fixes for logical replication.
Restored behavior for CTEs attached to INSERT/UPDATE/DELETE statements to pre-version 10.
Prevent low-probability crash in processing of nested trigger firings.
Do not evaluate an aggregate function's argument expressions when the conditions in the FILTER clause evaluate to FALSE. This complies with SQL-standard behavior.
Fix incorrect query results when multiple GROUPING SETS columns contain the same simple variable.
Fix memory leak over the lifespan of a query when evaluating a set-returning function from the target list in a SELECT.
Several fixes for parallel query execution, including fixing a crash in the parallel execution of certain queries that contain a certain type of bitmap scan.
Fix json_build_array(), json_build_object(), jsonb_build_array(), and jsonb_build_object() to handle explicit VARIADIC arguments correctly.
Prevent infinite float values from being casted to the numeric type.
Fix autovacuum's “work item” logic to prevent possible crashes and silent loss of work items.
Several fixes for VIEWs around adding columns to the end of a view.
Fix for hashability detection of range data types that are created by a user.
Improvements on using extended statistics on columns for the purposes of query planning.
Prevent idle_in_transaction_session_timeout from being ignored when a statement_timeout occurred earlier.
Fix low-probability loss of NOTIFY messages due more than 2 billion transactions processing before any queries are executed in the session.
Several file system interaction fixes.
Correctly restore the umask setting when file creation fails in COPY or lo_export().
Fix pg_dump to ensure that it emits GRANT commands in a valid order.
Fix pg_basebackup's matching of tablespace paths to canonicalize both paths before comparing to help improve Windows compatibility.
Fix libpq to not require user's home directory to exist when trying to read the "~/.pgpass" file.
Several fixes for ecpg.
Three security vulnerabilities have been closed by this release:
* CVE-2017-7546: Empty password accepted in some authentication methods
* CVE-2017-7547: The "pg_user_mappings" catalog view discloses passwords to users lacking server privileges
* CVE-2017-7548: lo_put() function ignores ACLs
Override INSTALL script to make sure owner/group args do not leak
into the binary packages. Fixes problems with building software
manually against binary postgresql*-client packages built under an
unprivileged setup. Bump respective PKGREVISION.
This release closes security hole CVE-2016-2193, where a query plan might get reused for more than one ROLE in the same session. This could cause the wrong set of Row Level Security (RLS) policies to be used for the query.
The update also fixes CVE-2016-3065, a server crash bug triggered by using pageinspect with BRIN index pages. Since an attacker might be able to expose a few bytes of server memory, this crash is being treated as a security issue.
packages. postgresql95-upgrade is gone, the pg_upgrade tool is shipped
with postgresql95-client now.
Major enhancements in PostgreSQL 9.5 include:
Allow INSERTs that would generate constraint conflicts to be turned into
UPDATEs or ignored
Add GROUP BY analysis features GROUPING SETS, CUBE and ROLLUP
Add row-level security control
Create mechanisms for tracking the progress of replication, including
methods for identifying the origin of individual changes during logical
replication
Add Block Range Indexes (BRIN)
Substantial performance improvements for sorting
Substantial performance improvements for multi-CPU machines
