E.35. Release 7.4.16

E.35.1. Migration to version 7.4.16

A dump/restore is not required for those running 7.4.X. However, if you are upgrading from a version earlier than 7.4.11, see the release notes for 7.4.11.

E.35.2. Changes

• Remove security vulnerability that allowed connected users to read backend memory (Tom)

  The vulnerability involves suppressing the normal check that a SQL function returns the data type it's declared to, or changing the data type of a table column used in a SQL function (CVE-2007-0555). This error can easily be exploited to cause a backend crash, and in principle might be used to read database content that the user should not be able to access.

• Fix rare bug wherein btree index page splits could fail due to choosing an infeasible split point (Heikki Linnakangas)

• Fix for rare Assert() crash triggered by UNION (Tom)

• Tighten security of multi-byte character processing for UTF8 sequences over three bytes long (Tom)