[ubuntu/groovy-updates] postgresql-12 12.6-0ubuntu0.20.10.1 (Accepted)

[Ubuntu Archive Robot]

postgresql-12 (12.6-0ubuntu0.20.10.1) groovy-security; urgency=medium

  * New upstream version (LP: #1915254)
    + Fix incorrect detection of concurrent page splits while inserting
      into a GiST index (Heikki Linnakangas)

      Concurrent insertions could lead to a corrupt index with entries
      placed in the wrong pages.  It's recommended to reindex any GiST
      index that's been subject to concurrent insertions.

    + Fix CREATE INDEX CONCURRENTLY to wait for concurrent prepared
      transactions (Andrey Borodin)

      At the point where CREATE INDEX CONCURRENTLY waits for all concurrent
      transactions to complete so that it can see rows they inserted, it
      must also wait for all prepared transactions to complete, for the
      same reason.  Its failure to do so meant that rows inserted by
      prepared transactions might be omitted from the new index, causing
      queries relying on the index to miss such rows. In installations that
      have enabled prepared transactions (max_prepared_transactions > 0),
      it's recommended to reindex any concurrently-built indexes in case
      this problem occurred when they were built.

    + Fix information leakage in constraint-violation error messages
      (Heikki Linnakangas)

      If an UPDATE command attempts to move a row to a different partition
      but finds that it violates some constraint on the new partition, and
      the columns in that partition are in different physical positions
      than in the parent table, the error message could reveal the contents
      of columns that the user does not have SELECT privilege on.
      (CVE-2021-3393)

    + Details about these and many further changes can be found at:
      https://www.postgresql.org/docs/10/static/release-12-6.html

Date: 2021-02-11 12:49:14.418052+00:00
Changed-By: Christian Ehrhardt  <christian.ehrhardt at canonical.com>
Signed-By: Ubuntu Archive Robot <cjwatson+ubuntu-archive-robot at chiark.greenend.org.uk>
https://launchpad.net/ubuntu/+source/postgresql-12/12.6-0ubuntu0.20.10.1
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