## E.256. Release 8.1.3

Release date: 2006-02-14

This release contains a variety of fixes from 8.1.2, including one very serious security issue. For information about new features in the 8.1 major release, see Section E.259.

### E.256.1. Migration to Version 8.1.3

A dump/restore is not required for those running 8.1.X. However, if you are upgrading from a version earlier than 8.1.2, see Section E.257.

### E.256.2. Changes

- Fix bug that allowed any logged-in user to `SET ROLE` to any other database user id (CVE-2006-0553)

  Due to inadequate validity checking, a user could exploit the special case that `SET ROLE` normally uses to restore the previous role setting after an error. This allowed ordinary users to acquire superuser status, for example. The escalation-of-privilege risk exists only in 8.1.0-8.1.2. However, in all releases back to 7.3 there is a related bug in `SET SESSION AUTHORIZATION` that allows unprivileged users to crash the server, if it has been compiled with Asserts enabled (which is not the default). Thanks to Akio Ishida for reporting this problem.

- Fix bug with row visibility logic in self-inserted rows (Tom)

  Under rare circumstances a row inserted by the current command could be seen as already valid, when it should not be. Repairs bug created in 8.0.4, 7.4.9, and 7.3.11 releases.

- Fix race condition that could lead to “file already exists” errors during pg_clog and pg_subtrans file creation (Tom)

- Fix cases that could lead to crashes if a cache-invalidation message arrives at just the wrong time (Tom)

- Properly check `DOMAIN` constraints for `UNKNOWN` parameters in prepared statements (Neil)

- Ensure `ALTER COLUMN TYPE` will process `FOREIGN KEY`, `UNIQUE`, and `PRIMARY KEY` constraints in the proper order (Nakano Yoshihisa)

- Fixes to allow restoring dumps that have cross-schema references to custom operators or operator classes (Tom)

- Allow pg_restore to continue properly after a `COPY` failure; formerly it tried to treat the remaining `COPY` data as SQL commands (Stephen Frost)

- Fix pg_ctl `unregister` crash when the data directory is not specified (Magnus)

- Fix libpq `PQprint` HTML tags (Christoph Zwerschke)

- Fix ecpg crash on AMD64 and PPC (Neil)

- Allow `SETOF` and `%TYPE` to be used together in function result type declarations

- Recover properly if error occurs during argument passing in PL/Python (Neil)

- Fix memory leak in `plperl_return_next` (Neil)

- Fix PL/Perl's handling of locales on Win32 to match the backend (Andrew)

- Various optimizer fixes (Tom)

- Fix crash when `log_min_messages` is set to `DEBUG3` or above in `postgresql.conf` on Win32 (Bruce)

- Fix pgxs `-L` library path specification for Win32, Cygwin, macOS, AIX (Bruce)

- Check that SID is enabled while checking for Win32 admin privileges (Magnus)

- Properly reject out-of-range date inputs (Kris Jurka)

- Portability fix for testing presence of `finite` and `isinf` during configure (Tom)

- Improve speed of `COPY IN` via libpq, by avoiding a kernel call per data line (Alon Goldshuv)

- Improve speed of `/contrib/tsearch2` index creation (Tom)